That's our range to convert a two-car (400 sq ft) attached garage into a bedroom, office or family room with no new plumbing, with a typical cost of about $23,600 (about $59 per sq ft). A finished garage that still parks cars typically costs about $9,200. Adding a bathroom raises the typical conversion to about $35,200.
Estimate Our range, based on sources [1][2]. Planning numbers, not quotes. Plumbing, heating and cooling, and what it takes to bring the floor up to the house move the price most.
Bars run from our Low to High figure; the dark tick marks Typical. Same numbers as the table below.
Garage conversion cost by type
What the garage becomes matters more than its size. Finishing a garage that still parks cars is mostly drywall, paint, lighting and flooring. Turning it into a room people live in adds insulation, heating and cooling, electrical work, windows and a new wall where the big door was. Plumbing for a bathroom is the biggest jump. The dollar columns use a 20×20 ft (400 sq ft) two-car garage.
| Type | Per sq ft Estimate | 400 sq ft Estimate | Typical Estimate |
|---|---|---|---|
| Finished garage (still a garage) Drywall, paint, lighting, storage and a coated or new floor. Still parks cars. | $12.50 – $29 | $5,000 – $11,600 | $9,200 |
| Living space, no plumbing A bedroom, office or family room: insulation, drywall, heating and cooling, electrical, windows and an infill wall. | $36 – $88 | $14,400 – $35,200 | $23,600 |
| Living space with a bathroom A bedroom suite or in-law suite with a bathroom, and sometimes a kitchenette, so new drains and supply lines. | $56 – $138 | $22,400 – $55,200 | $35,200 |
Estimate Our range, based on sources [1][2]. For each tier we pooled the low, midpoint and high figure each source publishes for a comparable scope (a single benchmark figure counts once), then used the median as Typical and the middle half of the pooled figures as Low–High. Totals without a stated size were divided by our 400 sq ft reference garage. The living-space tier pools HomeGuide's per-sq-ft and two-car ranges with Angi's per-sq-ft range and its national average; the bathroom tier pools Angi's in-law suite range and its bedroom-plus-bath figure with HomeGuide's in-law suite range. See How we build our ranges.
What the sources say Sourced
HomeGuide puts converting a garage to living space at $50 to $200 per sq ft, or $5,000 to $50,000+, and a garage bedroom at $5,000 to $17,000.[1] Angi's 2026 national average garage conversion is $16,460 from 953 projects, with most between $5,996 and $27,348, or about $25 to $75 per sq ft. Angi puts a simple bedroom at about $12,000 and a bedroom with a bathroom closer to $25,000.[2] A full accessory dwelling unit with its own kitchen costs more; see our ADU cost guide.
Garage conversion cost by garage size Estimate
| Garage | Living space, no plumbing Estimate | Typical Estimate | HomeGuide Sourced |
|---|---|---|---|
| One-car, 240 sq ft | $8,600 – $21,100 | $14,200 | $5,000 – $20,000+ |
| Two-car, 400 sq ft | $14,400 – $35,200 | $23,600 | $10,000 – $50,000+ |
| Large two-car, 576 sq ft | $20,700 – $50,700 | $34,000 | Not listed |
| Three-car, 720 sq ft | $25,900 – $63,400 | $42,500 | $30,000 – $75,000+ |
Estimate Our living-space ranges (no plumbing) multiplied by the floor area: 12×20 ft, 20×20 ft, 24×24 ft and a typical three-car garage. The HomeGuide column is its published range to convert each garage size to living space.[1] Angi puts a 240 sq ft garage at $6,000 to $18,000 and a 440 sq ft garage at $11,000 to $33,000.[2] Small garages carry the same fixed costs (permit, infill wall, heating and cooling), so they cost more per square foot.
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Line-item breakdown: two-car garage to a family room Estimate
Here's how we'd build the budget for turning a 400 sq ft attached garage into a family room or bedroom with no new plumbing: permit and drawings, a framed wall where the garage door was, a raised and insulated floor, insulation, drywall, electrical, a ductless mini-split, flooring, trim and paint. It's the checklist we'd hold every bid against.
| Line item | How we priced it | Amount Estimate |
|---|---|---|
| Building permit Fee | Our blended typical from HomeGuide's and Angi's garage-conversion permit ranges[1][2] | $1,000 |
| Permit drawings (floor plan and site plan) Fee | Midpoint of HomeGuide's blueprint rate ($0.35–$5.00 per sq ft) × 400 sq ft[1] | $1,070 |
| Infill wall where the garage door was: studs, sheathing, house wrap Materials | Our allowance | $650 |
| Remove the garage door; frame and sheathe the infill wall Labor | 24 hrs × $29.12/hr median wage for carpenters[4] × 1.7 labor burden | $1,190 |
| Vinyl siding on the infill wall, about 120 sq ft Installed price | Our typical installed vinyl rate ($8/sq ft) from the siding guide | $960 |
| Two windows in new openings Installed price | Midpoint of HomeGuide's per-window range ($150–$1,000) × 2[1] | $1,150 |
| Exterior door Installed price | Midpoint of HomeGuide's exterior door range[1] | $1,050 |
| Insulated subfloor over the slab: sleepers, rigid foam, plywood Materials | Our allowance, $2.75 per sq ft | $1,100 |
| Build the subfloor Labor | 32 hrs × $29.12/hr median wage for carpenters[4] × 1.7 labor burden | $1,580 |
| Insulation, walls and ceiling, about 1,000 sq ft Installed price | Midpoint of HomeGuide's garage insulation rate ($0.50–$3.00 per sq ft)[1] | $1,750 |
| Drywall, walls and ceiling, about 1,100 sq ft Installed price | Midpoint of HomeGuide's drywall rate ($1.50–$3.50 per sq ft)[1] | $2,750 |
| Electrical: circuits, outlets, switches and lights Installed price | Midpoint of Angi's garage-conversion electrical range[2] | $2,000 |
| Ductless mini-split, one zone Installed price | Average of the midpoints of Angi's ($1,500–$4,000) and HomeGuide's ($2,500–$6,000) mini-split ranges[1][2] | $3,500 |
| LVP flooring, 400 sq ft Installed price | Our typical installed LVP rate ($9/sq ft) from the flooring guide | $3,600 |
| Interior door to the house Installed price | Midpoint of HomeGuide's interior door range[1] | $525 |
| Trim and finish carpentry Labor | 16 hrs × $29.12/hr median wage for carpenters[4] × 1.7 labor burden | $790 |
| Trim and hardware Materials | Our allowance | $350 |
| Painting Labor | 24 hrs × $23.75/hr median wage for painters[4] × 1.7 labor burden | $970 |
| Paint and supplies Materials | Our allowance | $300 |
| Debris removal Installed price | Midpoint of HomeGuide's debris-removal range[1] | $475 |
| Overhead & profit Our assumption | 20% on the labor and materials lines above. Installed prices and fees already include the installer's margin, so we don't mark them up again. | $1,390 |
| Line-item total | Before contingency and regional adjustment | $28,150 |
Estimate Our line-item build comes to $28,150, about 19% above our blended typical of $23,600. The build includes permit drawings, a ductless mini-split, two new windows and an insulated subfloor. The published averages also include simpler offices and gyms that skip some of those, which pulls the blended typical down. Method: How we build our ranges.
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Get it freeWhat drives the cost up or down
The floor
Garage slabs usually sit below the house floor and slope toward the door. Most conversions build an insulated subfloor on top; HomeGuide puts raising or leveling a whole garage floor at $1,100 to $5,400.[1] Sourced
The garage door opening
The big door is usually replaced with a framed wall, a window or an entry door. Angi puts swapping the garage door for an entry door or sliding glass doors at $200 to $1,000, including framing.[2] Sourced
Plumbing
New plumbing costs $450 to $1,800 per fixture by HomeGuide's figures, and adding a full bathroom $20,000 to $30,000+.[1] Sourced That's why our bathroom tier sits well above a plain room.
Permits and code
A garage that becomes a bedroom or living room has to meet the same code as the rest of the house, including insulation, heat, and windows for light and escape. HomeGuide notes codes may require a window for fire safety once the garage door access is gone.[1] Ask your building department about parking and zoning rules before you design.
Contingency Estimate
Old slabs, wiring and moisture problems tend to show up once walls open. We suggest holding 10% to 15% for a garage conversion. That's our planning guidance.
Regional cost differences
A garage conversion is mostly interior trade work, so we apply our interior cost index to our typical two-car conversion with no plumbing.
| Region (Census division) | Our cost index Estimate | Typical two-car conversion, 400 sq ft Estimate |
|---|---|---|
| New England CT, ME, MA, NH, RI, VT | 1.04 4% above U.S. | $24,500 |
| Middle Atlantic NJ, NY, PA | 1.13 13% above U.S. | $26,500 |
| South Atlantic DE, DC, FL, GA, MD, NC, SC, VA, WV | 0.98 2% below U.S. | $23,000 |
| U.S. average | 1.00 | $23,600 |
| East North Central IL, IN, MI, OH, WI | 0.96 4% below U.S. | $22,500 |
| East South Central AL, KY, MS, TN | 0.90 10% below U.S. | $21,000 |
| West North Central IA, KS, MN, MO, NE, ND, SD | 1.02 2% above U.S. | $24,000 |
| West South Central AR, LA, OK, TX | 0.89 11% below U.S. | $21,000 |
| Mountain AZ, CO, ID, MT, NV, NM, UT, WY | 0.96 4% below U.S. | $22,500 |
| Pacific AK, CA, HI, OR, WA | 1.07 7% above U.S. | $25,500 |
Estimate Derived, not published. Our interior index divides each division's 2025 Cost vs. Value average for four interior projects (three bathroom remodels and a basement remodel) by the national average and averages the four ratios.[3] The typical column multiplies our national typical by the index. See How we build our ranges.
Costs in your city
Our local cost pages adjust these national ranges for 50 metro areas using local construction wages, and add each area's housing age, climate zone and permit office: Atlanta, Austin, Baltimore, Birmingham, Boston, Charlotte, Chicago, Cincinnati, Cleveland, Columbus, Dallas, Denver, Detroit, Fresno, Grand Rapids, Hartford, Houston, Indianapolis, Jacksonville, Kansas City, Las Vegas, Los Angeles, Louisville, Memphis, Miami, Milwaukee, Minneapolis, Nashville, New York, Oklahoma City, Orlando, Philadelphia, Phoenix, Pittsburgh, Portland, Providence, Raleigh, Richmond, Riverside, Sacramento, Salt Lake City, San Antonio, San Diego, San Francisco, San Jose, Seattle, St. Louis, Tampa, Virginia Beach, Washington. See all local costs →
Garage conversion FAQ
How much does it cost to convert a two-car garage into a room?
About $14,400 – $35,200 for 400 sq ft by our estimate, typically about $23,600, if no plumbing is added. HomeGuide puts converting a two-car garage to living space at $10,000 to $50,000+, and Angi's national average garage conversion is $16,460.[1][2]
Is a garage conversion cheaper than an addition?
Usually, because the slab, walls and roof are already there. Our typical garage conversion with no plumbing is about $59 per sq ft, versus about $165 per sq ft for a one-story room addition in our home addition guide.
Do I need a permit to convert a garage?
Almost always, because the space becomes a habitable room. HomeGuide puts a garage conversion permit at $1,000 to $2,000 for an attached garage, and Angi at $300 to $1,000.[1][2] Our blended typical is about $1,000. Ask about parking and zoning rules too.
Does a garage conversion add value?
Angi estimates about 80% of the cost comes back in home value, more for a bedroom or suite than an office or gym.[2] Losing covered parking matters more to buyers in some neighborhoods than others, so check what's typical near you.
How long does a garage conversion take?
Angi puts a typical garage conversion at four to eight weeks, depending on size and complexity.[2] Permits and inspections can add time before and during the work.
Related cost guides
Sources
- HomeGuide, “How much does a garage conversion cost?” (updated Aug 22, 2025). homeguide.com/costs/cost-to-convert-or-finish-a-garage (accessed Oct 20, 2026).
- Angi, “How Much Does a Garage Conversion Cost? [2026 Data]” (updated Aug 31, 2026). angi.com/articles/garage-conversions-add-valuable-living-space.htm (accessed Oct 20, 2026).
- Zonda / Journal of Light Construction, 2025 Cost vs. Value Report: national averages and regional pages (New England, Middle Atlantic, South Atlantic, East North Central, East South Central, West North Central, West South Central, Mountain, Pacific) (accessed Oct 8, 2026). © 2025 Zonda Media. We quote a few national figures and use the regional figures only to derive our own cost index. States per division from the U.S. Census Bureau, Census Regions and Divisions.
- U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May 2025 national median hourly wages by occupation, retrieved through the BLS Public Data API. bls.gov/oes (accessed Oct 8, 2026).
Quoted figures are labeled Sourced. Everything labeled Estimate is our own arithmetic on these sources, explained in How we build our ranges. Planning numbers only, not quotes. Get itemized local bids before you commit.