ADU Builder & Home Additions in Santa Monica, CA
Source: https://www.remodelyourvibe.com/services/adus-additions/santa-monica
Last modified: 2026-09-24T00:00:00.000Z
Text part: 1 of 1
Full website text index | Services by city | Previous page | Next page
Image: Open-plan living room and kitchen with polished concrete floors
- Santa Monica
Design · Permit · Build
ADUs & Additions in Santa Monica
Detached ADUs, garage conversions and additions, from plans to move-in.
Book a Consultation Call 818-300-2393
Built for Santa Monica Homes
Working here means designing for a narrow lot with an alley behind it and neighbors close on both sides. We plan pool excavation and material staging around permit-parking blocks and the city's construction-hour limits, and we check early whether a property falls inside the coastal zone or is old enough that demolition triggers landmark review. Salt air also shapes which metals, fasteners and finishes we are willing to put outdoors.
Mostly flat, modest rectangular lots on a tight grid, many of them alley-loaded with shallow rear yards and close side-yard neighbors. Larger estate parcels appear north of Montana Avenue.
We are a design-build team, which means the people who draw your project are the people who build it. Design, engineering, permits and construction run through one project manager and our own crews, so nothing gets lost in a handoff between a salesperson and a subcontractor. We are licensed, bonded and insured, CSLB license #1119054 .
Permits in Santa Monica: Residential building, grading and swimming pool permits are issued by the city's own Building and Safety Division at the Permit Services Center, not by Los Angeles. Properties inside the coastal zone still need a coastal development permit from the California Coastal Commission, because the city has a certified Land Use Plan but not yet a fully certified Local Coastal Program; a memorandum of understanding with the Commission was signed in 2026 to complete it.
Any demolition application for a structure more than 40 years old is transmitted to the Landmarks Commission for landmark review before it can move forward. Review durations vary by project and by whether coastal or historic review applies.
Permit details checked September 2026 against City of Santa Monica . Rules change, so we confirm them again for your parcel.
What We Build
- Coastal zone screening before design is finalized
- Alley and crane-based pool access planning
- Pre-demolition landmark review for older homes
- Detached ADUs, ground-up
- Garage conversions to living space
- Junior ADUs within the main house
- Room additions and bump-outs
- Second-story additions
- Full kitchens and bathrooms in the ADU
- Separate utility metering where required
- Private entries, patios and landscaping
- Plans, engineering and city submittals
- Title 24 energy compliance
Local Conditions
What to Know in Santa Monica
These local conditions change the scope, the schedule and the budget.
01
Parcels along the coastline, plus a small area on the eastern edge of the Pico Neighborhood, lie in the state-mapped liquefaction zone, which can push pool shells and ADU foundations toward deeper structural engineering.
02
Standard lots with rear alleys leave narrow side yards, so excavation spoils and gunite material typically move through the alley or over the house by crane.
03
Marine air within a mile of the water corrodes exposed fasteners, railings and equipment, so outdoor kitchens and pool gear get specified in stainless or powder-coated assemblies.
04
Housing stock from the 1920s through the 1940s often still carries undersized service panels and galvanized supply lines that must be upgraded before new outdoor loads are added.
Areas we serve in Santa Monica:North of MontanaSunset ParkOcean ParkWilmontMid-CityPico
Investment
What It Costs in Santa Monica
Real Southern California price ranges, not teaser numbers.
Detached ADU
$150,000 to $400,000+
What moves it: square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build
Garage conversion ADU
$80,000 to $180,000
What moves it: whether the existing slab and framing meet current code, how far utilities have to run, and the finish level of the kitchen and bathroom
Plans, drawings and permit management
$4,500 to $25,000+
What moves it: project type and size, whether structural engineering, Title 24 or a soils report is required, and how many jurisdictions or review bodies are involved
Your lot, access and finishes set the price. We walk the site, then show you where every dollar goes.
Get a line-item price for your Santa Monica property
The Process
How We Work in Santa Monica
01
Feasibility
We check lot size, setbacks, utilities and access to confirm what your property will actually support.
02
Design & 3D
Layout, elevations and finishes, modeled in 3D so you approve the unit before submittal.
03
Plans & Permits
We prepare the full drawing set, handle engineering and Title 24, and manage the city submittal and corrections. In Santa Monica that submittal goes to City of Santa Monica Building and Safety Division (Community Development Department).
04
Foundation & Framing
Site prep, foundation, framing and dry-in by our own crews.
05
Systems & Finishes
Electrical, plumbing, HVAC, insulation, then kitchen, bath and interior finishes.
06
Final Inspection
We pass final inspection, walk the unit with you and hand over the keys.
Questions
What Santa Monica Homeowners Ask
Who issues the permits for this work in Santa Monica?
City of Santa Monica Building and Safety Division (Community Development Department). Residential building, grading and swimming pool permits are issued by the city's own Building and Safety Division at the Permit Services Center, not by Los Angeles.
Properties inside the coastal zone still need a coastal development permit from the California Coastal Commission, because the city has a certified Land Use Plan but not yet a fully certified Local Coastal Program; a memorandum of understanding with the Commission was signed in 2026 to complete it.
Any demolition application for a structure more than 40 years old is transmitted to the Landmarks Commission for landmark review before it can move forward. Review durations vary by project and by whether coastal or historic review applies.
We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.
What makes building in Santa Monica different?
Mostly flat, modest rectangular lots on a tight grid, many of them alley-loaded with shallow rear yards and close side-yard neighbors. Larger estate parcels appear north of Montana Avenue. One local condition that shapes the work: Parcels along the coastline, plus a small area on the eastern edge of the Pico Neighborhood, lie in the state-mapped liquefaction zone, which can push pool shells and ADU foundations toward deeper structural engineering.
Which parts of Santa Monica do you work in?
All of it, including North of Montana, Sunset Park, Ocean Park and Wilmont. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site.
What does an ADU or addition cost in Santa Monica?
Detached ADU: generally $150,000 to $400,000+ across Southern California. What moves it is square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build. We give line-item pricing after seeing the site rather than quoting a number over the phone.
How long does an ADU take start to finish?
Plan a realistic year. Design and engineering typically take one to three months, city plan check and corrections add several more, and construction usually runs four to eight months depending on size and site access.
Is a garage conversion cheaper than a detached ADU?
Usually yes, and often substantially, because the foundation, walls and roof already exist. The trade-offs are that you lose the garage, and older slabs and framing sometimes need upgrading to meet current code.
Can I rent the ADU out?
California ADU law is designed to allow long-term rental, and an ADU is one of the few ways to add rentable square footage to a single-family lot. Short-term rental rules vary by city, so confirm your local ordinance before counting on that income.
Do you handle the permits?
Yes. Plans, engineering, Title 24 and the city submittal are all handled in-house, including responding to plan-check corrections. That is a service we sell on its own, so it is not something we hand off.
More Services in Santa Monica
Pool & Spa Remodeling in Santa Monica Backyard & Outdoor Living in Santa Monica Kitchen, Bath & Interior Remodeling in Santa Monica Plans, Permits & Design in Santa Monica Everything we build in Santa Monica
ADUs & Additions Nearby
ADUs & Additions in Pacific Palisades ADUs & Additions in Venice ADUs & Additions in Brentwood ADUs & Additions in Culver City ADUs & Additions in Los Angeles ADUs & Additions in Mar Vista
Planning Guides
Before You Build in Santa Monica
Costs, materials and process notes from our own projects.
Santa Monica Outdoor Living Cost on a Small Lot Santa Monica rear yards are small and the rules are not. Line-item costs for a 600 sq ft yard, on-site stormwater budgets, coastal review and the dimensions that make a tight space work. Read guide ADU Cost Breakdown by Size in Los Angeles A detached ADU in Los Angeles runs $150,000 to $400,000-plus. Here is the real cost broken down by unit size, with the soft costs, utility work and finish decisions that move the number. Read guide Garage Conversion to ADU: The Step-by-Step Build A garage conversion runs $80,000 to $180,000 in Southern California. Here is the real sequence, from slab testing and plan check to the raised floor, the mini-split and final sign-off. Read guide ADU Rental Income Math in the San Fernando Valley A one-bedroom ADU in the San Fernando Valley rents for roughly $2,100 to $2,900 a month. Here is the honest arithmetic on payback, carrying costs and what the unit adds to the property. Read guide
Planning an ADU in Santa Monica?
Sit down with your project manager and get an accurate estimate. We call you back within one business day.
Book a Consultation 818-300-2393
Licensed, bonded & insured · CSLB license #1119054
End of text part 1 of 1. This page is complete.