Your San Mateo ADU,
Designed & Built Right.
Bay Area homeowners trust Mayer’s Construction for ADU construction in San Mateo — with our in-house design team, full permit handling, and licensed build crew all under one roof. CA License #1063024.
More Than an ADU. A Smart Bay Area Investment.
San Mateo San Mateo ADU construction includes in-house design, permit handling, and licensed build — everything managed under one roof from first sketch to final inspection.
San Mateo Specialist
ADU
Complete ADU in San Mateo — from layout planning and design to custom cabinetry, countertops, and appliance installation. In-house team. Zero outsourcing.
Bathroom Remodel
Full bathroom renovations — shower, tub, tile, vanity, and fixtures. Our in-house design team creates cohesive spaces that match your kitchen and home aesthetic.
Room Addition / ADU
Expand your San Mateo home with a licensed room addition or accessory dwelling unit. Structural planning, permits, and build — all handled by our licensed crew.
Construction & Remodeling
General contracting for San Mateo homeowners — structural changes, whole-home remodels, and complex renovation projects managed start to finish.
Garage Conversion
Convert your garage into livable space — home office, guest suite, or rental unit. Permitted, designed, and built by our in-house team from day one.
Design & Build
One team. One contract. Zero coordination gaps. Our in-house designer and licensed builders take you from concept to completion without third-party delays.
Projects That Speak
For Themselves
Every San Mateo ADU gets our in-house designer, dedicated project manager, and licensed crew — from first sketch to final walkthrough.
Simple. Transparent. Done Right.
Three steps from your first call to your final walkthrough — no surprises, no outsourcing, no stress.
Free In-Home Estimate
We visit your San Mateo property, assess your ADU options and site constraints, and give you an honest estimate. No commitment. Just a real conversation about what’s possible.
Design & Material Selection
Our in-house design team works with you on layout, cabinetry, countertops, and fixtures. We source everything — so you don’t coordinate with multiple vendors.
Build & Final Walkthrough
Our licensed San Mateo crew handles permits, construction, and daily cleanup. Your project manager keeps you updated every single day.
Convert Your San Mateo Garage Into a Fully Permitted ADU
Many San Mateo homeowners have an attached or detached garage that can become a fully permitted accessory dwelling unit — guest quarters, rental income, or a home for extended family. Garage conversion is one of the most cost-effective ADU types because the foundation and structure already exist. Mayer’s Construction handles the full conversion — design, permits, and build — as one integrated project with one point of contact.
Full-Service Conversion
Insulation, HVAC, plumbing, electrical, kitchen, and bath — every trade is our own in-house crew. No subcontractor coordination required from you.
Permit Handling Included
State ADU law requires San Mateo to allow garage conversions. We file all permits, manage plan check, and coordinate inspections through to certificate of occupancy.
In-House Design Included
Our designer optimizes your garage layout for livable, functional space — with material sourcing assistance for finishes, fixtures, and cabinetry.
The Contractor San Mateo Homeowners Actually Recommend
San Mateo homeowners choose Mayer’s because we bring our in-house designer and licensed crew to every project — with zero outsourcing and daily updates from start to finish.
In-House Design Team
Our designer works with you on every layout, cabinet, countertop, and finish. No third-party designers, no coordination delays.
We Source Your Materials
From countertop slabs to cabinet hardware — we handle sourcing so you don’t chase vendors.
San Mateo ADU Permit Process
San Mateo ADU permits go through the City of San Mateo Building Division. San Mateo follows state ADU law with a structured review process. We manage every permit step from initial submittal through final certificate of occupancy — keeping you updated throughout without requiring you to contact the city.
Daily Progress Updates
Your dedicated project manager texts and calls you every day. No surprises. No wondering what’s happening.
Family-Owned Accountability
Nathan and the Mayers team are personally invested in every San Mateo project. This is our reputation — and we protect it.
Real San Mateo Homeowners. Real Results.
Every review below is from a verified Google client.
“Nathan and his team handled our complete remodel from start to finish. Daily updates, zero surprises. Their designer Natalee made our vision real. Best decision we made as San Mateo homeowners.”
“Our outdated kitchen was completely transformed into a modern, functional space I absolutely love. The in-house design team helped us source exactly the materials we had in mind — and the result is better than anything I could have imagined.”
“Mayer’s CNR exceeded every expectation. Quality and attention to detail on every single aspect of our remodel. I have referred them to three neighbors already.”
Rated 5.0 on Google & Houzz
San Mateo ADU Questions
Honest answers about timeline, permits, licensing, and how we work.
Serving San Mateo & the Bay Area
Licensed ADU contractor covering the entire Bay Area Peninsula and South Bay.
Your San Mateo ADU
Starts with One Call
Schedule your complimentary ADU consultation. We visit your San Mateo property, assess your ADU options, and give you an honest estimate — no pressure, no obligation.
Get Your Free San Mateo ADU Estimate
We’ll schedule your complimentary in-home visit within days. No pressure. No obligation.
SKIP THE WAIT
Book Your Free Consultation — Right Now
Pick a time that works for you. We’ll call you, walk through your project, and give you an honest plan — no pressure, no obligation.
Prefer to call? Reach us at (888) 394-4041