You're standing in a home that almost works. The kitchen feels crowded when family gathers, a parent needs more privacy, your office has taken over the dining table, or guests keep sharing the only bathroom. Moving may solve the problem, but it also means leaving a neighborhood, yard, school district, or location you already value.
The right room addition idea usually isn't the one that adds the most square footage. It's the one that solves the clearest problem with the least unnecessary structural complexity. A detached ADU may make sense for rental flexibility, while a second-story suite could preserve a small yard. A bathroom addition may deliver more daily value than a larger but rarely used sitting room.
The options below compare ten additions by use case and project scale, including property context, layout choices, permitting questions, cost and timeline considerations, trade-offs, marketability, visual direction, and a practical next step. Any preliminary cost or schedule discussion is a planning conversation, not a bid. California and Arizona requirements vary by municipality, site conditions, utilities, zoning, HOA rules, structural needs, and project scope.
1. Accessory Dwelling Unit Addition
An accessory dwelling unit, or ADU, is one of the most flexible ways to add usable housing to a California or Arizona property. It can be attached to the main house, built as a detached cottage, or created by converting an existing garage or other space. A well-planned unit typically includes its own sleeping area, bathroom, kitchen, and living space, allowing it to function as a rental, guest residence, or home for family members.
California's ADU market shows how strongly homeowners have adopted this format. State housing data report that annual ADU permits rose from 1,336 in 2016 to 30,354 in 2024, described as a 20-fold increase, and ADUs represented more than 26.6% of all homes permitted statewide in 2024. The National Association of Home Builders' permit data places that growth within the broader housing market.
Where an ADU works best
A deep backyard may support a detached cottage, while a side-yard connection can make an attached unit more efficient. Garage conversions often reduce exterior construction, but they still require careful review of ceiling height, insulation, moisture protection, windows, fire separation, plumbing, and electrical service.
Practical rule: Treat the ADU as a small house, not as a large bedroom with a kitchenette.
Before choosing a layout, verify the city's ADU ordinance, setbacks, height limits, parking rules, utility requirements, owner-occupancy provisions where applicable, and HOA restrictions. Plan sewer, water, electrical, gas, and maintenance access early. A separate entrance and thoughtful site circulation can protect privacy and reduce friction with neighbors.
The main advantage is flexibility. The main risk is assuming that a statewide policy makes every lot automatically buildable. An architect and contractor familiar with the specific jurisdiction can test feasibility before you commit to a design. For a Bay Area homeowner converting a detached garage, the most important decision may be utility routing and fire separation rather than finishes. For an Arizona family creating a casita for an aging parent, shade, cooling, and accessible circulation may matter more than maximizing interior area.
Use the attached comparison image to distinguish the three common formats.
Your next step is a site and code review that maps property lines, existing utilities, access, parking, and the likely unit location before design development begins.
2. Multigenerational Living Suite Addition
A multigenerational suite needs to balance connection and independence. Families often want an aging parent nearby without making that person feel as if they're living in a hallway, basement, or temporary guest room. Adult children may need a private base while contributing to the household. The best design creates a clear boundary between shared family life and personal space.
A suite can be inside the existing house, attached to one side, or arranged as a casita. A private exterior entrance helps preserve independence, while an interior connection can support caregiving and everyday family interaction. The layout might include a bedroom, accessible bathroom, compact sitting area, storage, and a small food-preparation zone. Whether that zone qualifies as a kitchen or accessory unit can affect zoning and permitting, so define the intended use before drawings are finalized.
Design for changing needs
Accessibility should be built into the plan rather than added after a mobility change. A curbless shower, blocking for grab bars, lever handles, clear floor areas, non-slip flooring, strong lighting, and reduced thresholds can make the suite safer without giving it an institutional appearance. The guidance on bathroom renovations for elderly homeowners can help families think through these details before selecting fixtures.
California and Arizona homeowners should confirm occupancy rules, setbacks, fire separation, egress, parking, and utility requirements with the local building department. If the space may become a rental later, ask about separate meters, entrances, and taxation before construction. A design that works for family use may need different approvals if the intended use changes.
Money and caregiving expectations also need a direct conversation. Decide who pays for construction, utilities, maintenance, and future modifications. Clarify whether the suite is intended for one household member, multiple adults, or eventual rental use.
The strongest next step is a joint planning meeting with the occupants, designer, and contractor. Map daily routines, privacy needs, emergency access, storage, and future mobility before choosing the footprint.
3. Primary Suite Addition
A primary suite addition can transform the most private part of the home. It may combine a larger bedroom with a bathroom, walk-in closet, reading chair, exercise corner, or small sitting area. The best versions feel calm and deliberate, not like an oversized bedroom attached to a collection of disconnected fixtures.
Start with the site. A rear addition may create a quiet retreat, while a second-story addition can preserve outdoor space on a compact lot. Coastal California homes may orient the sitting area toward a view, but that choice must be balanced against privacy, glare, wind, and window maintenance. In Arizona, exterior shading, insulated glazing, efficient cooling, and careful solar orientation deserve early attention.
Make the suite useful beyond appearance
The bathroom should support both comfort and long-term usability. Include generous clearances, a shower layout that can accommodate future grab bars, durable flooring, and ventilation that exhausts moisture properly. Separate HVAC zoning can improve comfort when the bedroom and bathroom have different temperature needs. Insulation and air sealing matter too, especially where the addition joins an older structure.
A primary suite can support marketability because many buyers look for a private bedroom and bathroom arrangement. That doesn't mean every luxury feature will return its cost. Oversized closets, specialized fixtures, or highly personal finishes may narrow buyer appeal. A restrained material palette, strong storage, good lighting, and reliable mechanical systems usually serve more households than an elaborate spa concept.
Use the open interior image as inspiration for how circulation, light, and connected living areas can feel more generous.
Permitting questions include setbacks, lot coverage, structural framing, egress, plumbing, electrical capacity, and any HOA design review. A second-story option may require structural evaluation of the existing foundation and walls. A ground-floor addition may simplify access but consume yard area.
Ask NorCal Construction for two preliminary schemes, one that builds out and one that builds up. Comparing privacy, structural work, yard impact, and future resale is more useful than choosing a style from a photo alone.
4. Guest Suite or Bedroom Addition
A guest suite is a practical choice when visitors stay often but shouldn't disrupt the household. The defining feature isn't just an extra bedroom. It's independent comfort, usually created with a nearby or private bathroom, separate entrance, sound control, storage, and reasonable access to parking.
A rear corner of the house may work well for a connected suite. A detached guest cottage can provide stronger separation, but it brings additional foundation, utility, site-access, and permitting questions. In Arizona, a casita-style design can match the main home while providing shaded outdoor space. In California, a guest suite may later be considered for rental use, but owners should confirm local rules before designing around that possibility.
Plan for guests, not just occupants
A guest room should have enough outlets for chargers and personal devices, usable bedside lighting, luggage space, and a comfortable path to the bathroom. Solid-core doors, insulation, and careful duct placement can reduce sound transmission. Independent temperature control helps when visitors prefer different conditions from the rest of the household.
Exterior access is useful, but it affects security, lighting, drainage, and circulation. If the suite is intended for older guests, avoid steps where possible and use a bathroom layout that supports changing mobility needs. If frequent visitors will bring vehicles, review parking and driveway movement before locating the addition.
The marketability of a guest suite depends on proportion and flexibility. A room that can serve as a bedroom, office, or hobby space may appeal to more buyers than a highly specialized entertainment suite. Conversely, adding a bathroom can create meaningful daily convenience even if the bedroom is used only occasionally.
Before design begins, decide whether the room is strictly for guests, a future family member, or possible income. That answer affects entrances, kitchen facilities, privacy, and code review. Request a feasibility sketch that compares an attached suite with a detached option, then evaluate the disruption each would cause during construction.
5. Open-Concept Kitchen and Dining Room Addition
An open kitchen and dining addition works when the existing home has the right bones but not enough room for cooking, eating, and gathering together. The project may involve removing walls, extending the rear of the house, enlarging a kitchen, or connecting the kitchen directly to a patio through large sliding doors.
The first question is structural. A wall that looks ordinary may carry roof, floor, or upper-level loads. Have a qualified professional evaluate it before you assume that demolition will be simple. Beam size, post locations, foundation support, plumbing routes, electrical service, and HVAC distribution can determine whether the desired openness is practical.
Keep the room open without making it undefined
An island can separate work and social zones without rebuilding a wall. Its size and placement should protect circulation, appliance access, seating, and door swings. Continuous flooring can visually connect the new and existing areas, but the transition must account for changes in floor height and material availability.
Ventilation becomes more important when cooking smells and noise travel through the entire living area. Select a range hood that exhausts properly, not merely a recirculating appliance chosen for appearance. Layer ambient, task, and accent lighting so the room works for food preparation, homework, dining, and evening entertaining.
For a smaller home, disciplined storage may create more usable capacity than a large footprint. This guide to remodeling a small kitchen on a budget offers a useful reminder that layout efficiency should come before decorative upgrades.
California and Arizona projects may require review of structural, electrical, plumbing, mechanical, energy, and exterior-opening changes. Indoor-outdoor connections also bring questions about drainage, weather sealing, shade, and threshold transitions.
Watch the video for a visual reference on open kitchen planning.
A concrete next step is to mark the existing kitchen and dining circulation during a normal family meal. Record where people stop, cross, store groceries, and serve food. Those observations should shape the preliminary plan more than a staged photograph.
6. Bathroom Addition or Second Bath Installation
A second bathroom can solve a problem that homeowners feel every day. Morning congestion, guests sharing a family bathroom, children crossing private areas, or an aging relative needing a closer facility can all justify this type of addition. The project may be a powder room, a compact three-quarter bath, a full bathroom beside bedrooms, or a Jack-and-Jill arrangement.
The most cost-conscious location is often near existing plumbing, but that doesn't mean the nearest wall is automatically the best choice. Confirm drain paths, venting, water pressure, electrical capacity, ceiling conditions, and access for future repairs. A bathroom below or adjacent to existing wet areas may reduce routing complexity, while a remote addition may require more invasive work inside finished spaces.
Plan the small room carefully
A powder room needs less area than a full bath, but door swings, fixture clearances, ventilation, and privacy still control the layout. A full bathroom needs a more deliberate relationship between toilet, vanity, shower or tub, storage, and drying space. Pocket doors can save clearance, but they require compatible wall construction and hardware.
Waterproofing is not a decorative detail. Shower walls, corners, niches, curbs, floors, and transitions need a coordinated system installed according to the manufacturer's requirements. Ventilation should exhaust outdoors, and the duct route should avoid creating condensation problems in attics or wall cavities.
For aging-in-place planning, include blocking for future grab bars, a low-threshold shower, strong lighting, slip-resistant surfaces, and adequate maneuvering space. Fixture quality matters more than trend-driven finishes when the room will receive heavy daily use.
Read this overview of average bathroom remodel cost for broader planning context, but treat any online range as a starting point rather than a project quote. Site access, framing, plumbing distance, finish selections, and permit requirements can change the scope substantially.
Confirm local requirements in California or Arizona before construction. Then ask NorCal Construction to compare a powder room, a compact full bath, and a more accessible layout if the household's needs may change.
7. Home Office or Studio Addition
A dedicated office or studio earns its space by making work possible without taking over the rest of the home. A remote employee may need video-call privacy, a designer may need a controlled creative workspace, and a professional consultant may need a separate entrance for occasional clients. The addition should support the actual work, not just contain a desk.
Place it away from the kitchen, television, laundry, and the main circulation path when the site allows. A solid-core door and acoustic insulation can make a greater difference than decorative wall panels. Windows should provide daylight without placing glare directly across monitors. In Arizona, exterior shade and heat control are especially important for rooms with significant glazing.
Build the infrastructure before the finishes
Plan dedicated electrical capacity for computers, monitors, printers, lighting, and equipment. Hardwired internet can provide more reliable connectivity than depending on a distant wireless router, particularly in detached studios. Provide outlets where furniture may move, and leave access for future equipment instead of burying every connection behind built-ins.
An exterior door can separate professional traffic from family life, but it brings security, lighting, weather protection, and accessibility considerations. If the space may later become a bedroom, confirm egress, insulation, heating, cooling, and ceiling requirements before reducing window size or choosing a highly specialized layout.
A converted garage may be efficient, but garages often need substantial work to become comfortable conditioned rooms. Review slab height, moisture, insulation, fire separation, garage-door openings, and utility routes. A new backyard studio may offer better daylight and independence, but it can consume yard space and raise site-work costs.
The marketability of an office improves when the room can serve another purpose. Built-in storage should be attractive but adaptable. A wide desk niche can later become a homework area, library, or sewing station.
Begin with a furniture and equipment plan. Draw the desk, chair, shelves, camera position, storage, and door swing at full scale. That simple exercise will reveal whether you need a compact office, a larger studio, or a separate structure.
8. Sunroom or Three-Season Room Addition
A sunroom creates an intermediate zone between the house and the outdoors. It can serve as a reading room, breakfast area, plant room, lounge, or protected entertaining space. The attraction is natural light and a stronger connection to the yard, but the design must control heat, glare, moisture, and privacy.
California and Arizona properties often have excellent outdoor-living potential, yet extensive glazing can turn a poorly oriented room into an uncomfortable heat pocket. Use high-performance, UV-blocking glass, exterior shade where appropriate, operable windows, and ceiling fans. Retractable screens can improve ventilation while preserving the connection to the garden.
Decide whether it needs full conditioning
A three-season room may have limited heating and cooling, while a fully conditioned sunroom becomes part of the home's year-round interior area. That distinction affects insulation, windows, HVAC sizing, energy compliance, electrical planning, and how the room can be marketed or used. Don't describe an unconditioned enclosure as equivalent to a standard bedroom or living room.
The foundation and drainage deserve as much attention as the windows. Direct water away from the structure, coordinate roof runoff, and protect the connection between old and new foundations. Floor materials should tolerate temperature changes and the traffic associated with garden access. Window treatments can manage afternoon glare and protect furniture.
The visual goal should be continuity. Match roof forms, trim proportions, exterior materials, and interior flooring where practical. A glass box that ignores the original home may look like an afterthought, even when the room itself is attractive.
Permits can involve setbacks, foundation work, structural connections, glazing, electrical service, HVAC, and energy requirements. HOA review may also control exterior appearance. Ask for a sun study and a seasonal comfort discussion before approving the window package.
A useful next step is to visit the proposed location at different times of day and note sun, wind, glare, privacy, and views. Those observations will determine whether the best answer is a glazed room, a shaded porch, or a more solid addition with selected windows.
9. Outdoor Living Space Addition
A deck, patio, pergola, or integrated outdoor kitchen can add function without extending the conditioned footprint of the house. In California and Arizona, outdoor living may support dining, entertaining, exercise, relaxation, and family gatherings for much of the year. The addition works best when it connects naturally to the rooms people already use.
Start with grading and drainage. Water must move away from the foundation, and the finished surface should meet the home without creating a trip point or directing runoff toward doors. Deck footings, retaining conditions, stairs, guardrails, lighting, and privacy screens all need to align with local requirements. In colder Arizona locations, footing depth and freeze-thaw conditions deserve special attention.
Design for climate and daily use
A Prescott homeowner may need shade, wind protection, and durable finishes that handle seasonal exposure. These custom outdoor living spaces for Prescott homeowners illustrate why regional conditions should shape the plan. Coastal California projects may need different responses to moisture, salt air, sun, and wind.
A pergola provides visual structure, but it may not offer enough heat protection on its own. Consider a solid roof, shade sails, retractable coverings, trees, or layered screening. Outdoor kitchens need water, drainage, gas or electrical planning, ventilation, appliance clearances, and weather-resistant storage. Built-in seating can make a space feel finished, but movable furniture preserves flexibility.
Lighting should support safety and atmosphere. Place fixtures at stairs, changes in level, cooking areas, and circulation routes without creating glare into the house or neighboring properties. Outdoor receptacles make fans, lighting, and appliances easier to use, but they must be planned with electrical protection and weather exposure in mind.
Before choosing materials, draw the furniture, grill, dining table, walking paths, doors, and shade areas. Then request a permit and site-feasibility review that accounts for property lines, drainage, utilities, and the relationship between the outdoor area and the existing home.
10. Second-Story Addition
Building upward can add bedrooms, bathrooms, an office, or a primary suite while preserving the backyard. It's often the strongest option for a constrained lot, but it can also be the most structurally demanding. The existing foundation, walls, roof, and lateral systems must be evaluated before the design is treated as feasible.
A second story may work well over a portion of a ranch-style home, above an existing garage, or as a focused suite rather than a full additional floor. The layout should account for stair placement, headroom, circulation, plumbing alignment, emergency egress, privacy, and the impact on rooms below. Stacking bathrooms and mechanical spaces can simplify routing, but it may limit the ideal arrangement.
Compare vertical growth with a ground-floor addition
Building up preserves yard area and may create better views. It can also affect neighbors, privacy, sunlight, roof geometry, construction access, and the experience of living in the home during work. Building out may simplify everyday access and avoid stairs, but it consumes open space and may trigger setback or lot-coverage limits.
California and Arizona homeowners should investigate zoning height limits, setbacks, structural requirements, fire safety, energy compliance, HOA review, and any local design standards. A structural engineer may need to assess whether the existing foundation and framing can support the added load. Temporary protection, weatherproofing, and construction sequencing become major planning issues because the contractor must open the existing roof and connect new work to occupied rooms.
A second story can improve resale when it creates a coherent bedroom and bathroom arrangement, but awkward stairs, low headroom, poor cooling, or disconnected circulation can reduce its usefulness. The design should look intentional from the street and feel integrated inside.
Ask NorCal Construction to prepare a build-up versus build-out comparison. Review structural assumptions, yard impact, stair location, construction disruption, and likely permitting complexity before selecting the direction.
9 Room Addition Ideas Compared
| Addition Type | 🔄 Implementation Complexity | ⚡ Resource Requirements (cost & timeline) | 📊 Expected Outcomes | 💡 Ideal Use Cases | ⭐ Key Advantages |
|---|---|---|---|---|---|
| Accessory Dwelling Unit (ADU) Addition | High, full design, zoning, utility separations, multiple inspections | High materials & labor; separate utilities possible; $150k–$400k+; 6–12 months | Strong rental income potential; substantial property value increase | Rental income, multigenerational housing, long‑term equity | ⭐ Maximizes land use; independent living; high ROI |
| Multigenerational Living Suite Addition | Medium, accessibility upgrades, interior rework, possible zoning considerations | Moderate–high; accessibility fixtures, plumbing; $60k–$150k+; 4–8 months | Enables aging‑in‑place, reduced long‑term care costs, modest value gain | Elder care, in‑laws, adult children needing proximity | ⭐ Supports caregiving; more affordable than ADU; family cohesion |
| Primary Suite Addition | Medium, structural, plumbing/electrical work for luxury finish | Moderate–high; high‑end finishes common; $50k–$150k+; 3–6 months | Luxury retreat; significant resale appeal and perceived value | Homeowners seeking personal luxury and resale boost | ⭐ High ROI; highly customizable comfort features |
| Guest Suite or Bedroom Addition | Low–Medium, straightforward room build or conversion | Moderate; basic furnishings & possible ensuite plumbing; $25k–$60k+; 2–3 months | Flexible hosting space; potential short‑term rental income | Frequent visitors, VRBO/Airbnb (where allowed), flexible extra room | ⭐ Versatile use; relatively affordable addition |
| Open‑Concept Kitchen & Dining Addition | Medium, may require structural beams and MEP rework | Moderate–high; cabinetry, ventilation, structural work; $40k–$120k+; 2–4 months | Improved flow, natural light, entertaining appeal | Families who entertain; indoor‑outdoor living upgrades | ⭐ Enhances function and modern appeal; boosts marketability |
| Bathroom Addition / Second Bath | Medium, significant plumbing work and possible structural adjustments | Moderate; plumbing, fixtures, waterproofing; $20k–$80k+; 2–4 months | Major convenience, higher resale value, better bath‑to‑bed ratio | Growing families, multigenerational homes, resale preparation | ⭐ High ROI; strong impact on daily convenience |
| Home Office or Studio Addition | Low, interior finish, electrical and soundproofing upgrades | Low–moderate; wiring, insulation, tech setup; $20k–$60k+; 1–3 months | Improved productivity; tax/remote‑work benefits; modest value gain | Remote workers, creatives, small professional practices | ⭐ Affordable; flexible conversion potential |
| Sunroom / Three‑Season Room Addition | Low–Medium, glazing, foundation, and seasonal HVAC choices | Moderate; high‑performance glass, framing; $25k–$80k+; 2–3 months | More daylight, indoor‑outdoor connection, moderate value add | Plant rooms, casual entertaining, view capture spaces | ⭐ Light‑filled space; relatively straightforward build |
| Outdoor Living Space (Deck/Patio/Pergola) | Low, site work and carpentry; complexity rises with multi‑level designs | Low–moderate to high; decking/pavers, shade structures; $15k–$100k+; 1–3 months | Expanded usable outdoor area, strong perceived value | Entertaining, backyard retreats, climate‑adapted outdoor living | ⭐ Fast install; high perceived value; excellent ROI |
Turn the Best-Fit Idea Into a Buildable Plan
The strongest choice usually becomes clear after you define the unmet need in plain language. If the problem is rental flexibility or a private household for relatives, compare an ADU with a multigenerational suite. If the household needs everyday comfort, a second bathroom, primary suite, or kitchen expansion may deliver more practical value than a larger addition used occasionally. If the property has limited yard area, compare a second-story plan with a compact interior reconfiguration before committing to a ground-floor footprint.
Review five decisions first:
- Unmet need: Identify whether you need privacy, income flexibility, accessibility, entertaining space, work separation, storage, or outdoor comfort.
- Available footprint: Confirm setbacks, easements, property lines, mature trees, drainage paths, parking, and utility locations.
- Independence: Decide whether the space should connect directly to the home, have its own entrance, include cooking facilities, or remain part of the primary residence.
- Disruption tolerance: Consider whether your family can live through demolition, roof work, plumbing shutdowns, dust, noise, and reduced access.
- Resale priorities: Favor flexible bedrooms, bathrooms, efficient storage, durable materials, and layouts that future owners can understand and use.
California ADUs demonstrate why permitting and feasibility deserve attention early. The state reported 41,831 ADU permits in 2025, a new statewide record and a 5.5% increase over 2024, according to the reported ADU permitting data. That growth doesn't mean every property can accommodate the same format. Local ordinances, lot conditions, utilities, parking, setbacks, fire access, and neighborhood rules still control the project.
The wider remodeling market also supports a serious planning approach. The Harvard Joint Center for Housing Studies' 2025 remodeling report reports that U.S. remodeling activity expanded from $404 billion in 2019 to $609 billion in 2023, a 51% increase. That figure describes the scale of the remodeling market, not the price of your addition. Your actual project will depend on structural conditions, access, labor, finishes, permits, utilities, and the scope you approve.
Use this sequence to move from inspiration to a responsible decision:
- Document the existing property. Gather a survey if available, photographs, floor plans, utility information, HOA documents, and notes about drainage, access, and neighboring structures.
- Write the use case. Describe who will use the space, how often, what privacy is required, and whether the function could change later.
- Confirm feasibility. Ask about zoning, setbacks, height, lot coverage, parking, egress, fire separation, energy requirements, structural capacity, and utility connections.
- Compare preliminary layouts. Review build-out, build-up, conversion, attached, detached, and outdoor alternatives where relevant.
- Establish a planning budget and schedule. Include design, engineering, permits, site work, utility upgrades, materials, construction, contingencies, and temporary living arrangements. Preliminary ranges are not bids, and schedules can change when approvals or concealed conditions change.
- Review financing options carefully. Homeowners comparing funding approaches can compare renovation loan programs while also discussing the project with a qualified financial professional.
- Request coordinated construction support. NorCal Construction works with homeowners on additions, ADUs, kitchens, bathrooms, full renovations, and outdoor installations. A consultation can connect design coordination, permitting support, material selection, and construction management to the specific California or Arizona property.
A good room addition should look as though it belongs to the original home, but visual continuity is only one measure of success. The addition should also perform well, remain maintainable, meet applicable codes, support the household's real routines, and avoid spending heavily on square footage that doesn't solve the underlying problem. Choose the smallest scope that delivers the needed function, then invest in the structural, mechanical, waterproofing, storage, and circulation details that make the space dependable.
If you're deciding between one or two concepts, prepare a short brief with your address, property type, household needs, desired use, preferred location, and major concerns. Send that information to NorCal Construction before selecting finishes. A focused feasibility conversation can reveal whether the right move is a new room, a converted space, a second story, an ADU, or a more efficient remodel of what you already have.
NorCal Construction can help California and Arizona homeowners evaluate room additions, ADUs, second-story projects, kitchens, bathrooms, sunrooms, decks, patios, pergolas, and outdoor living spaces. Visit NorCal Construction to request a consultation for design coordination, permitting questions, material planning, and construction management for your property.