Concept project · 90272
01SOLANA Estate
Spanish Colonial Revival
A courtyard estate shaped by shade, ceremony and the enduring character of hand-finished materials.
Illustrative target · Q4 2027
Explore the concept
RSA Development
Beverly Hills · Los Angeles
Design, permits and construction for Los Angeles homes.
Residential design, permitting and construction organized around the property, the approval path and the work that can actually be built.
ADUs, custom homes, additions, remodeling and complex sites across Greater Los Angeles. Background image: concept study, not a completed RSA project.
How a project starts
Choose the city and project
ADU, custom home, addition or remodel — the city decides which office reviews it.
Add the address if you have it
Optional. It sharpens the agency list; it never replaces your city choice.
Talk with the office
Review your brief, then send it to RSA in Beverly Hills. Nothing is sent without your confirmation.
The California Collection
Distinct architecture. Exceptional ways to live.
Four original architectural languages: the traditional courtyard, the urban workshop, the Art Deco facade and the crafted coastal estate.
Architectural concepts with illustrative schedules; ZIP codes indicate design context. Not property listings.
Concept project · 90291
02ATELIER Townhouse
Venice artist loft
An urban home with the vertical energy of a workshop and the intimacy of a planted threshold.
Illustrative target · Q2 2028
Explore the concept
Concept project · 90212
03PALOMA Residences
Art Deco
A sculpted residential facade where vertical order and stepped terraces carry the identity.
Illustrative target · Q1 2029
Explore the concept
Concept project · 90265
04COVE House
California coastal Shingle Style
A broad coastal estate with a complex roofscape, sheltered verandas and materials that welcome weathering.
Illustrative target · Q4 2028
Explore the conceptWhat would you like to build?
Choose the path that fits the property.
Every engagement begins with the site and the homeowner’s priorities—not a prepackaged scope.
01
Accessory dwelling units
Detached ADU · garage conversion · compact independent living
A separate residential path around the property you already own, with utility, access and agency questions kept visible.
02
Custom homes
Ground-up residence · lot-led planning
A new primary structure shaped by the lot, owner program, consultants and the responsible approval path.
03
Home additions
New area connected to an existing house
Expansion work organized around the old-to-new structure, envelope, building systems and construction access.
04
Whole-home remodeling
Retain · repair · replace decisions
A disciplined way to decide what stays, what changes and where systems or structure drive the real scope.
05
Complex sites
Hillside · access · rebuild conditions
Early coordination for properties where slope, records, structure, utilities or local review shape the project path.
Property & Project Desk
Census · Aug 2026
Municipal pulse
343units in one-unit buildings · Los Angeles
Same month 2025: 329. Citywide total: 2,478 units.
Your next decision · Records research
Has the city confirmed the parcel is inside its jurisdiction?
Get: City zoning/parcel lookup or written confirmation from the planning counter
Why it matters
A mailing city or ZIP does not decide which rules apply; every later step depends on the right authority.
Official starting point: Los Angeles County Assessor Portal
Build your project brief
Method & limits
New privately-owned housing units authorized by permit (Census Building Permits Survey), matched by exact California place ID. Excludes remodels and additions; it does not measure approval time or construction cost.
Reported (C-404 form)
Census BPSBuilt around the site
Complex conditions deserve an integrated response.
Slope, access, existing structures and local review can reshape a project. Addressing them early connects design ambition to a buildable path.
- Site and zoning feasibility
- Architecture + engineering coordination
- Permit and plan-check management
- Construction through closeout
Project Studio
Turn an idea into a useful starting point.
Choose a project type and city. The result organizes the first questions; it does not determine feasibility, price or approval.
Beverly Hills · Detached ADU
Start by confirming the permit authority, parcel constraints, utilities and the relationship to the primary home.
Parcel conditions and the responsible jurisdiction must be verified for the actual address.
Authority to verify
City of Beverly Hills Community Development
First local question
Confirm the city boundary
How the work moves forward
A disciplined sequence, with decisions named before the work is treated as fixed.
Scope, contracts, consultants and agency decisions are project-specific. RSA does not guarantee permit outcomes or generic timelines.
- 01
Feasibility
We study the site, planning constraints and project goals before design commitments are made.
- 02
Design
Architecture, engineering and material decisions develop against one clear project brief.
- 03
Approvals
The submission, corrections and agency coordination stay connected to the original design intent.
- 04
Construction
Field work, selections and quality control are managed through one accountable team.
- 05
Closeout
Inspections, documentation and the final walk-through are completed before handover.
How we work
Built by people who show up.
From the Beverly Hills office to the job site: drawings and material coordination, foundations, framing and interiors with one team.
Illustrative AI-assisted scenes — not photos of specific RSA staff or completed RSA projects.
RSA Client Privileges · Los Angeles
Local client experiences.
RSA Project AtlasIllustrative projects
What could be built, city by city.
Explore illustrative design studies across Greater Los Angeles. They are not client projects: each one shows a realistic goal, a site question worth asking early and how a project journey typically unfolds.
24 illustrative concepts · 14 cities
RSA location
Based in Beverly Hills, serving Greater Los Angeles.
8484 Wilshire Blvd, Beverly Hills, CA 90211
(818) 975-3783Explore contexts
Verified RSA Development address. Use the directions link for exact arrival guidance.
Context labels, not parcel boundaries. Verified 2026-09-24 · City of Beverly Hills · Residential Submittal Requirements
Project questions
Clear answers before you begin
Start with practical guidance on feasibility, approvals, timing and the design-build process.
What does an ADU cost to build in Los Angeles?
A useful budget starts with the property, proposed size, site access, utilities, structure and finish decisions. General square-foot averages can hide major site and approval work, so RSA organizes known scope, allowances, exclusions and unresolved risks before presenting a property-specific range.How long does the entire process take, from contract to keys?
The sequence includes feasibility, design, technical coordination, agency review, corrections, construction, inspections and closeout. Duration depends on the jurisdiction, property and scope; a responsible schedule identifies those dependencies instead of promising a generic completion date.Do I need to live in the primary house to build an ADU?
Generally no. Government Code § 66315 prohibits local owner-occupancy requirements for ordinary ADUs; § 66341(c)(3) has a qualified-buyer separate-sale exception. For JADUs, § 66333(b) requires owner occupancy when sanitation is shared, subject to statutory ownership exceptions; independent sanitation changes that rule.Will building an ADU reassess my property taxes?
Property-tax treatment is determined by the county and the facts of the improvement. Review current guidance with the Los Angeles County Assessor and a qualified tax professional before using any estimate in a financial decision.What rental income can an ADU realistically produce?
Rent and yield vary by location, unit, market conditions, financing, vacancy, operating costs and lawful use. Use current comparable listings and professional advice, then test several scenarios rather than treating a single projected rent as guaranteed.What's the first step to get a real number for my lot?
Submit your address through Contact and tell us what you are considering. We will review the property context and outline an appropriate next step.Which recent California ADU laws affect LA homeowners?
AB 976 removed the owner-occupancy sunset for ordinary ADUs; AB 1033 permits separate condominium sales only after a local opt-in ordinance. City of LA council file 25-0753 documents a motion, not an effective ordinance. SB 1211 changed multifamily ADU allowances; review the property's jurisdiction and statutory pathway before relying on a unit count.How do I verify my LA ADU contractor is actually licensed?
Look up the license number on the California Contractors State License Board portal at cslb.ca.gov/onlineservices. Confirm the classification is B (general building) or B-2 (residential remodeling), the bond is current, and the workers' compensation policy is active. Cross-check with BBB and LA County Consumer Affairs for complaint history.
Start with the property
Let’s understand what your site can become.
Share the address, your priorities and where you are in the process. We’ll use that context to frame the right next conversation.
Our Community · Los Angeles & Beyond
Built here. Connected to more.
We care about strong neighborhoods and the people who serve them. Explore organizations supporting veterans, disaster recovery and access to housing—and choose how you would like to get involved.
Explore all six organizations- 01Learn about their work
Habitat for Humanity of Greater Los Angeles
Local homebuilding, home-repair and disaster-recovery programs across Greater Los Angeles.
- 02Learn about their work
Team Rubicon
Veteran-led disaster response serving communities before, during and after disasters.
- 03Learn about their work
Mission 22
Recovery, resiliency and community programs for veterans and their families.
RSA Development shares these independent organizations as community resources. We are not affiliated with them and do not collect donations on their behalf.