Garage Conversion Cost by State (2026)
Calculate the cost of converting a garage into living space, ADU, home gym, or workshop. Compare local costs across all 50 states and 800+ cities — updated for 2026.
$18,000
$6,000 – $40,000
How much does garage conversion cost in 2026?
Converting a garage into living space costs about $18,000 on average in the US in 2026, typically ranging from $6,000 to $40,000. A basic conversion to a finished room sits at the low end, while a full apartment or ADU with a kitchen, bathroom, and HVAC reaches the top. Labor is roughly 58% of the total, and insulation, climate control, and replacing the garage door drive most of the budget.
What affects garage conversion cost?
Insulation & climate control
Garages are uninsulated and uncomfortable, so making the space livable means insulating the walls, ceiling, and floor, plus adding heating and cooling. Insulation runs $2,000–$5,000, and extending HVAC or adding a mini-split system $2,000–$6,000. The concrete slab is often cold and may need insulation or subfloor work before flooring. This climate-control work is essential and a large share of the budget, separating a true conversion from a glorified storage room.
Garage door replacement
Replacing the garage door with a framed, insulated wall — typically with a window or door — is a defining step of any conversion. This runs $1,500–$5,000 including framing, insulation, siding to match the house, and the new opening. Matching the exterior so the converted space blends in (rather than looking like a filled-in garage) is important for both appearance and resale value, and adds to the cost.
Plumbing & kitchen
Adding a bathroom or kitchenette transforms a garage into an ADU or apartment but is the biggest cost driver. Running water, drain, and vent lines into a garage that lacks them can add $5,000–$15,000, since the slab may need cutting for drains. A full ADU with a kitchen and bath sits at the top of the range. A simple conversion to a gym, office, or playroom skips plumbing and stays far cheaper.
Permits & ADU rules
Garage conversions are a change of use and require permits for building, electrical, insulation, and any plumbing. If you're creating an ADU, local zoning, setback, parking, and occupancy rules apply and vary widely — some areas encourage ADUs, others restrict them heavily. Losing covered parking can also affect resale in some markets. Permitting and code compliance are essential; unpermitted conversions are a major liability at sale and can require costly correction.
Garage Conversion Cost Breakdown (2026)
Estimated national average by project option. Use the calculator on any city page for an estimate tailored to your location.
Conversion type
| Home gym / workshop (basic) | $6,300 |
| Bonus room / entertainment space | $11,700 |
| Living space (no kitchen/bath) | $15,300 |
| ADU / in-law suite (with kitchen + bath) | $18,000 |
| Full ADU + separate entrance | $24,300 |
Garage size
| Single car (200–300 sq ft) | $9,900 |
| 1.5 car (300–400 sq ft) | $14,400 |
| Double car (400–600 sq ft) | $18,000 |
| Triple car / oversized (600+ sq ft) | $26,100 |
Finish quality
| Basic | $11,700 |
| Mid-range | $18,000 |
| High-end | $28,800 |
Garage Conversion Cost by State — Click Your State
Alabama
5 cities
avg $14,000
from $4,700
Alaska
1 cities
avg $24,300
from $8,100
Arizona
9 cities
avg $17,100
from $5,700
Arkansas
3 cities
avg $13,500
from $4,500
California
23 cities
avg $24,300
from $8,100
Colorado
6 cities
avg $18,900
from $6,300
Connecticut
5 cities
avg $21,600
from $7,200
Delaware
2 cities
avg $18,900
from $6,300
Florida
15 cities
avg $17,100
from $5,700
Georgia
6 cities
avg $15,800
from $5,300
Hawaii
1 cities
avg $27,900
from $9,300
Idaho
3 cities
avg $15,800
from $5,300
Illinois
7 cities
avg $19,800
from $6,600
Indiana
4 cities
avg $15,800
from $5,300
Iowa
3 cities
avg $15,700
from $5,200
Kansas
5 cities
avg $15,300
from $5,100
Kentucky
3 cities
avg $14,800
from $4,900
Louisiana
4 cities
avg $14,900
from $5,000
Maine
1 cities
avg $16,700
from $5,600
Maryland
4 cities
avg $20,700
from $6,900
Massachusetts
4 cities
avg $23,400
from $7,800
Michigan
6 cities
avg $16,700
from $5,600
Minnesota
3 cities
avg $18,900
from $6,300
Mississippi
2 cities
avg $12,600
from $4,200
Missouri
5 cities
avg $15,800
from $5,300
Montana
2 cities
avg $15,800
from $5,300
Nebraska
2 cities
avg $15,700
from $5,200
Nevada
4 cities
avg $18,000
from $6,000
New Hampshire
2 cities
avg $18,900
from $6,300
New Jersey
4 cities
avg $22,500
from $7,500
New Mexico
3 cities
avg $14,900
from $5,000
New York
8 cities
avg $25,200
from $8,400
North Carolina
8 cities
avg $15,800
from $5,300
North Dakota
2 cities
avg $15,800
from $5,300
Ohio
6 cities
avg $16,200
from $5,400
Oklahoma
4 cities
avg $14,400
from $4,800
Oregon
5 cities
avg $19,800
from $6,600
Pennsylvania
4 cities
avg $18,900
from $6,300
Rhode Island
1 cities
avg $20,700
from $6,900
South Carolina
4 cities
avg $14,800
from $4,900
South Dakota
2 cities
avg $14,800
from $4,900
Tennessee
5 cities
avg $14,900
from $5,000
Texas
15 cities
avg $16,200
from $5,400
Utah
4 cities
avg $17,100
from $5,700
Vermont
1 cities
avg $18,000
from $6,000
Virginia
5 cities
avg $18,000
from $6,000
Washington
6 cities
avg $20,700
from $6,900
West Virginia
2 cities
avg $14,000
from $4,700
Wisconsin
3 cities
avg $17,100
from $5,700
Wyoming
2 cities
avg $15,800
from $5,300
Garage Conversion Cost — Frequently Asked Questions
How much does a garage conversion cost in 2026?
Garage conversions average $18,000 nationally, ranging from about $6,000 for a basic finished room to $40,000 for a full apartment or ADU with a kitchen and bathroom. Insulation, climate control, and replacing the garage door are baseline costs for any conversion, while adding plumbing for a kitchen or bath drives the upper end. A simple conversion to a gym or office stays near the lower end.
Is converting a garage worth it?
It depends on your market and what you're adding. Converting a garage to an ADU or extra bedroom can add significant rental income or living space at a lower cost than an addition. But losing covered parking can hurt resale in areas where buyers expect a garage. The best return comes from a permitted, well-finished conversion that blends with the home — especially an income-producing ADU in markets that allow them.
Do I need a permit to convert a garage?
Yes, always. A garage conversion is a change of use requiring building, electrical, insulation, and (if adding a kitchen or bath) plumbing permits, with inspections. Creating an ADU triggers additional zoning, setback, parking, and occupancy rules that vary widely by location. Permits are essential — unpermitted conversions can't be counted as legal living space, complicate sales, and may have to be reverted or brought up to code at significant expense.
Can I convert a garage into an ADU?
Often yes, but it depends entirely on local zoning. Many areas now encourage accessory dwelling units and have streamlined rules, while others impose strict limits on size, setbacks, parking replacement, and occupancy. A garage-to-ADU conversion needs a full kitchen, bathroom, separate entrance, and code-compliant systems, typically landing at the upper end of the cost range. Check your local ADU regulations before planning, as they determine feasibility and cost.
How long does a garage conversion take?
A basic conversion to a finished room — insulation, drywall, flooring, replacing the garage door, and electrical — takes about 3–6 weeks. Adding plumbing for a bathroom or kitchen, or building a full ADU, extends it to 2–4 months including design, permitting, and inspections. Zoning approval for an ADU can add weeks before construction starts. Plumbing and the slab work it requires are the main schedule drivers.
Other Renovation Calculators
Bathroom Remodel
avg $11,500
Kitchen Remodel
avg $26,000
Flooring Installation
avg $9
Interior Painting
avg $4
Electrical Wiring
avg $4,500
Plumbing
avg $3,500
Roof Replacement
avg $10,000
Full Home Renovation
avg $50
Bedroom Remodel
avg $6,500
Living Room Remodel
avg $9,500
Dining Room Remodel
avg $6,000
Kids Room Remodel
avg $5,000
Attic Conversion
avg $28,000
Home Office Remodel
avg $7,500
Basement Finishing
avg $50
Entryway Remodel
avg $3,500
Closet Installation
avg $3,000