ADU & Garage Conversion Los Angeles - ACE Design & Build
Serving Los Angeles & San Fernando Valley

See your ADU. On your lot. Before you sign anything.

ACE Design & Build adds detached ADUs, junior ADUs, and garage conversions across LA - permits, design, and construction handled by one team. See your ADU on your lot before you sign anything.

4.9 Google · 120+ reviews
CSLB licensed & bonded
Fixed-price contracts

Get Your Free ADU Plan

Tell us about your lot. We respond within 2 hours.

ACE ADU project ACE ADU project ACE ADU project ACE ADU project ACE ADU project ACE ADU project ACE ADU project ACE ADU project ACE ADU project
The Opportunity

Your Lot Is Worth More Than You Think.

Most LA homeowners are sitting on space that could pay them rent every month - and they don't even know it. Here's what waiting is really costing you:

A yard you avoid instead of enjoy. Unused square footage going to waste while the property tax keeps rising.
No idea what the finished space will look like. You sign a contract, then hope.
DIY weekends that turn into months. Costing more than a pro would have.
See yours, transformed
AfterLAZYAFTER Before
‹›
Today
After
Drag to compare
The ACE ADU Visualizer

See your ADU. On your lot. In eight seconds.

Snap a photo of your garage or rear yard. Our AI renders a real-photo ADU on your actual lot - then we turn it into a fixed-price plan.

What we build

Eight specialties. One studio.

Garage Conversion

Convert your existing garage into a code-legal living unit. Same footprint. Faster permit. Lowest cost path.

Detached ADU

New detached unit in your rear yard. Up to 1,200 sq ft, two bedrooms, full kitchen and bath.

Above-Garage ADU

Second-story ADU built atop your existing garage. Garage stays, living space stacks.

Junior ADU (JADU)

Convert part of your main house. Up to 500 sq ft. Lowest cost, fastest permit.

Permits & HCD

Title 24, Building & Safety, HCD pre-approved plans. We handle the entire process.

Plans & Title 24

Full architectural plans, structural engineering, energy compliance. Stamped and ready.

Construction

In-house licensed crews. Foundation to final inspection. Weekly updates, fixed price.

Rental-Ready Finishes

Tenant-friendly materials that look great and survive tenants. Built for long-term income.

Featured Projects

Real Lots. Real Permits. Real ADUs.

Encino, CA

The Encino Detached

Detached 2BR ADU + Private Entry + Solar + EV Charging

7 months 950 sq ft
Sherman Oaks, CA

The Sherman Oaks Conversion

Garage Conversion 1BR + Skylight + Patio + Smart Locks

12 weeks 480 sq ft
Studio City, CA

The Studio City Above-Garage

Above-Garage 1BR + Covered Porch + Designer Cladding

8 months 780 sq ft
Tarzana, CA

The Tarzana JADU

JADU Conversion + Private Entry + Kitchenette

8 weeks 420 sq ft
Woodland Hills, CA

The Woodland Hills Estate

Detached 2BR Luxury + Stone Accent + Full Landscape

10 months 1,150 sq ft
Van Nuys, CA

The Van Nuys Income Build

Detached 1BR + Solar + Tenant-Ready Finishes

6 months 650 sq ft
Reseda, CA

The Reseda Garage Conversion

Garage Conversion Studio + Large Glass + Patio

10 weeks 380 sq ft
Calabasas, CA

The Calabasas Family ADU

Detached 2BR Mediterranean + Tile Roof + Patio

9 months 1,050 sq ft
Northridge, CA

The Northridge Above-Garage

Above-Garage Studio + Solar + EV Charging Below

7 months 560 sq ft

Ready to Unlock Your Lot?
It Starts with a Free AI Render.

No call. No deposit. No "schedule a consultation." See it. Then we talk.

Get Started
Reviews
★★★★★ 4.9 Google · 120+ reviews

Don't Take Our Word For It

“
ACE walked us through every permit step. The detached ADU pulls in $2,800/month and the whole process was way less painful than we feared.
Jessica & Tom R. Encino, CA
“
Our garage was sitting empty for years. ACE turned it into a 1-bedroom unit in 11 weeks - on budget. Tenant moved in two weeks after final inspection.
Marcus D. Sherman Oaks, CA
“
We interviewed five ADU builders. ACE was the only one who understood Title 24 and HCD without a learning curve. That confidence saved us months.
Rachel & Brian K. Woodland Hills, CA
“
The AI render they showed us at the first meeting was almost identical to the finished build. We knew exactly what we were getting.
David & Sarah M. Studio City, CA
“
Above-garage ADU. Tight lot. Tough setbacks. ACE handled the structural review, neighbor concerns, and HOA. We just signed papers.
Michael T. Tarzana, CA
“
JADU conversion of our master suite. ACE built a private entry and kitchenette that look like the original house. Mom moved in last month.
Jennifer & Mark L. Van Nuys, CA
Why ACE

Why 500+ LA Homeowners Chose ACE

Design-Build Under One Roof

Plans, permits, HCD, structural, and construction all under one team. No finger-pointing, no schedule gaps.

Free AI Visualizer

See your ADU on your actual lot before any contract. Real-photo render in eight seconds, free.

Transparent Pricing

Fixed price for the build. No hidden fees. No surprise change orders unless the city forces them.

Licensed, Insured, Guaranteed

CSLB licensed. Fully insured. Written workmanship warranty on every ADU we deliver.

On-Time Permit Path

We know LADBS, LA County, and HCD pre-approved plans. Most ADUs break ground in under 90 days.

Local LA + Valley Builder

Every project across LA city + San Fernando Valley. We know the inspectors. We know the soils.

How it goes

From Lot to Lease in 4 Steps

01

Free Lot Assessment

We visit your home, walk the lot, talk through ADU type, setbacks, and likely budget.

02

3D + AI Design

See your ADU on your actual lot. Refine layout, exterior, finish - until you love it.

03

Permits + HCD

We submit plans, manage corrections, and pull every permit. You sign once, we do the rest.

04

Build & Inspect

In-house crews build to final inspection. Then keys in hand - move in or list for rent.

FAQ

Got Questions? We Have Answers.

It depends on type. A garage conversion runs $95K-$160K. A detached new-build ADU runs $260K-$480K depending on size and finish. JADU conversions start around $55K. Above-garage ADUs typically run $310K-$500K because of structural reinforcement. Our calculator above gives a ballpark; an in-home consultation gives you an exact number.
For HCD pre-approved plans (the fastest path) we usually have permits in hand in 4-8 weeks. For full custom plans, plan on 8-16 weeks for LADBS plus utility clearances. We submit, we correct, we follow up - so the timeline is on our shoulders, not yours.
Yes. California state law (AB-68, AB-881, SB-9, and follow-on bills) lets homeowners rent ADUs and JADUs. Owner-occupancy is no longer required for most ADUs as of 2020. We can walk you through the current rules for your specific zoning.
A standard ADU can be detached, attached, or a converted garage - up to 1,200 sq ft. A JADU (Junior ADU) is a conversion of part of the main house, capped at 500 sq ft, and shares some plumbing with the main house. JADUs are cheaper and faster to permit but smaller and less rent-able.
For a standard ADU, no - owner-occupancy is no longer required statewide as of 2020. For a JADU, yes - the owner must live in either the main house or the JADU. Local zoning may add nuance; we will confirm for your address before quoting.
We serve the City of Los Angeles, LA County, and the San Fernando Valley - including Encino, Sherman Oaks, Woodland Hills, Studio City, Tarzana, Calabasas, Brentwood, Bel Air, Pacific Palisades, Northridge, Van Nuys, Reseda, and surrounding cities.
Yes. We work with HELOC partners, ADU-specific construction lenders, and cash-out refinance specialists. Many homeowners self-finance with HELOC because the rental income covers the payment within months. We will walk you through current options at your consultation.
The AI Visualizer takes a real photo of your lot and shows you exactly what the new ADU will look like in that exact spot - your trees, your fence, your house behind it. A traditional 3D rendering is a generic mockup. We produce both: the AI render is free in the first conversation, the full architectural 3D follows during design.
Limited: Free AI Render + 3D Design ($2,500 Value)

Your Lot. Reimagined. Reimagined.

Tell us about your lot. We will create a free AI render of your ADU on your actual property - so you can see the possibilities before committing to anything.

Tell us about your project

Two-hour reply on weekdays.

Call Try AI Quote