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Garage Conversion Cost

The median Los Angeles garage conversion declares $40,000, about $93 a square foot. This is the whole distribution, both permit paths, and what the figure leaves out.

7,486 permitsLos Angeles2022 to 2025

Median project

$40,000

Declared on the permit

Per square foot

$93

On a 397 sq ft garage

Permit wait

90 days

Median, application to issue

Permitted as an ADU

78.5%

Not as an extra room

From 7,486 Los Angeles garage conversion permits, 2022 to 2025. Declared value is a fee figure, so a contractor quote sits above it.

A converted garage on a Los Angeles bungalow, its roll-up door replaced by a stucco wall with a wide window and its own front door, the original driveway apron still running up to it
The tell of a finished conversion: the door opening becomes a wall with a window and its own entrance, and the driveway apron stays. This is the alteration path, the cheaper of the two below.

What 7,486 Los Angeles permits actually say

Every other page ranking for this question quotes a national range. These are the values homeowners declared to the City of Los Angeles when they pulled a permit to turn a garage into living space, which is a distribution rather than an average, and it is the honest shape of the answer.

What 7,486 Los Angeles permits declared
The cheapest tenthSmall, simple, often a single room$20,000
A quarter file underModest footprint, straightforward build$25,000
The median projectWhat a typical filing declares$40,000
A quarter file overLarger, or a kitchen or bath inside it$50,000
The top tenthStructural work or a high finish level$75,000

Declared construction value on garage conversion permits filed in Los Angeles, 2022 to 2025. This is what the applicant files for fee purposes, so a contractor quote for the same work runs higher.

The direction of travel

In 2020, 1,353 filings carried a median of $25,000. In 2021, 1,811 filings carried a median of $30,000. In 2022, 2,150 filings carried a median of $40,000. In 2023, 1,778 filings carried a median of $40,000. In 2024, 1,803 filings carried a median of $40,000. In 2025, 1,755 filings carried a median of $40,000. That is a rise of 60% across the window, on filings rather than on quotes.

The fork that doubles the price

Los Angeles files a garage conversion under one of two permit types, and the gap between them is the single biggest number on this page. Converting inside the walls the garage already has is an alteration. Pushing the footprint out while you convert is an addition, and it brings foundation, framing and roof work with it.

Median declared value, 2022 to 2025
Convert inside the existing walls7,486 permits. Alteration permit. A quarter file under $25,000, a quarter over $50,000.$40,000
Convert and add floor area6,831 permits. Addition permit. A quarter file under $50,000, a quarter over $120,000.$80,000

Both sets carry the same filter and the same caveats. The difference is the permit type Los Angeles assigned, which is decided by whether the project adds floor area.

What it works out to per square foot

6,155 of these permits declare a floor area as well as a value. Across them the median works out to $93 per square foot, with the middle half running $62 to $129. The median garage in the set is 397 square feet, which is a standard two-car footprint.

One-car garageAbout 240 sq ft
$15,000 to $31,000
Two-car garageAbout 400 sq ft, the LA median
$25,000 to $52,000
24 by 24 garage576 sq ft
$36,000 to $74,000
Oversized two-carAbout 720 sq ft
$44,000 to $93,000

Each range is the garage footprint multiplied by the middle-half per-square-foot band above. It is a filing benchmark to check a quote against, not a quote.

What the garage actually becomes

People search for this as a room, an apartment, a bedroom or living space. Los Angeles records what was actually permitted, and the answer is lopsided: nearly four in five conversions are permitted as a full accessory dwelling unit, not as an extra room.

Share of 7,486 conversions, and what each declares
A full ADUIts own kitchen, bath and entrance. A separate legal dwelling.78.5%median $40,000
A junior ADUUp to 500 sq ft, an efficiency kitchen, and it may share a bath.17.9%median $35,000
A bedroomHabitable space inside the house, no second unit created.2.1%median $27,000
A habitable roomOffice, den or living space. No kitchen, no second unit.1.5%median $30,000

Read from the permit's own ADU and junior-ADU columns where present, and from the work description otherwise. A conversion permitted as an ADU has to meet dwelling standards, which is most of why it costs more than a bedroom.

And how long the permit takes

12,140 of these permits carry both an application date and an issue date. Half were issued within 90 days of applying. A quarter cleared in 41 days, a quarter took more than 181, and the slowest tenth ran past 344. That wait is money on most projects, because it sits in front of every trade. The timeline tool breaks it down by city and review track.

Methodology

How to read these numbers, and where they stop

Built from City of Los Angeles building permits (LADBS), filings from 2022 to 2025. Not a national average, and not a quote.

  • Declared valuation is the figure the applicant files for fee calculation. It sits below the all-in price: design, permit fees, financing and most finish upgrades are not in it.
  • Coverage runs from January 2020, where the LADBS application data begins, to August 2026. Figures on this page use the complete years.
  • Los Angeles filings only. Do not read these levels across city lines, fee practice differs by jurisdiction.
  • Single-family alteration permits, which is the garage being converted inside its existing walls. Permits that also add floor area are counted separately on this page.

3 California conversion contractors, editor-screened. 4 questions.

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Questions homeowners ask before they start

How much does it cost to convert a garage?
Across 7,486 Los Angeles garage conversion permits filed from 2022 to 2025, the median declared construction value was $40,000. A quarter came in under $25,000 and a tenth ran past $75,000. That figure is what the applicant declares for fee purposes, so a contractor quote for the same work runs higher: design, permit fees, financing and most finish upgrades are not in it.
How much should a 24 by 24 garage conversion cost?
A 24 by 24 garage is 576 square feet. Los Angeles filings work out to a median of $93 per square foot, with the middle half between $62 and $129, which puts a 576 square foot conversion at roughly $36,000 to $74,000 in declared value. The median garage in the dataset is 397 square feet, a standard two-car footprint.
Is it cheaper to convert a garage or to build an ADU from scratch?
Converting is roughly a third of the cost. Measured on the same Los Angeles dataset over the same years, garage conversions declare a median of $40,000 while detached new-build ADUs declare $120,000 across 6,323 permits. The slab, the walls and the roof already exist, so the money goes into insulation, windows, services and finish rather than into structure. It is why most California ADUs are conversions.
What is the cheapest way to convert a garage?
Stay inside the walls the garage already has, and do not create a second dwelling. Converting within the existing footprint declares a median of $40,000; a conversion that also adds floor area is filed as an addition and declares $80,000. Below that, a junior ADU or a habitable room comes in lower again, because it avoids the full dwelling standards a complete ADU has to meet.
Do I need a permit to convert my garage into a room?
Yes, in every California city. Converting a garage to habitable space changes its occupancy, which triggers plan check, and if it becomes an ADU it also brings in state ADU law. Unpermitted conversions are one of the most common findings at resale, and an unpermitted room usually does not appraise.
How long does a garage conversion permit take?
Half of the 12,140 Los Angeles conversion permits with both dates on the record were issued within 90 days of the application. A quarter cleared in 41 days, a quarter took more than 181, and the slowest tenth ran past 344 days.
Can I turn my garage into an apartment?
In California that is an accessory dwelling unit, and it is the normal outcome rather than the exception: 78.5% of Los Angeles garage conversions are permitted as a full ADU with its own kitchen, bath and entrance, at a median of $40,000. Another 17.9% are junior ADUs, which are capped at 500 square feet and may share a bathroom with the house.
Will converting my garage hurt the value of the house?
It depends on what the neighbourhood expects. Where street parking is scarce, losing a garage can cost you at resale. Where an extra bedroom or a rentable unit is worth more than covered parking, it usually adds. A permitted conversion appraises; an unpermitted one often does not.

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The permit data behind this page

Every filing we used, as CSV and JSON, with the method that produced these bands.