With high rents and limited housing, a well-built ADU is one of the smartest investments a Santa Monica homeowner can make. Perfection Builders designs and builds ADUs and garage conversions, and remodels the bathrooms and kitchens of Santa Monica’s classic 1920s–1950s homes.
ADUs and Garage Conversions
Detached backyard units, attached ADUs and garage conversions, with plans, City of Santa Monica permits and construction handled from start to finish. Learn more about ADU construction.
Bathroom Remodeling
Older homes often have small bathrooms and outdated plumbing. We rebuild them with modern waterproofing, walk-in showers, good ventilation and finishes that suit the house. Learn more about bathroom remodeling.
Built for the Coast
Moisture-resistant materials and careful waterproofing so your project lasts in the coastal climate.
ADUs in Santa Monica
Santa Monica has its own building and planning department and its own ADU rules, working within California’s ADU laws. Most single-family lots can add a detached ADU, an attached unit or a garage conversion, and parts of the city near the beach are in the Coastal Zone, which can add review steps. We confirm what your lot allows before design starts and manage the plans, permits and construction.
Recent Work Nearby
A kitchen remodel we completed in nearby Marina del Rey.



Santa Monica Remodeling Questions
Can I build an ADU on my Santa Monica lot?
Most single-family lots can. Size, height and setbacks depend on the lot and the type of ADU. We check your address first.
Can you convert my garage into an ADU?
Yes. Garage conversions are often the fastest and most affordable ADU, because the structure is already there.
Can you update an older bathroom and keep its character?
Yes. We modernize plumbing, waterproofing and ventilation and can keep or recreate period tile and details.
How do we start?
Book a free consultation, and we will look at your lot or home and talk through options and budget.
Why Perfection Builders
Perfection Builders is a licensed, bonded and insured general contractor (CSLB #1085229). One team handles design, permits and construction, with clean job sites, clear updates and a free in-home consultation to start.
Thinking About an ADU in Santa Monica?
Book a free consultation or call (323) 212-3020. See our work in the Gallery.