2 free starting plans
3 car garage plans
Two ways to park three cars. The 24x36 puts three 9 ft doors in a row on the long wall; the 30x40 has a 16 ft and a 9 ft door and room for a workshop.
- Plans
- 2
- Floor, sq ft
- 864 to 1,200
- Materials, about
- $19,400 to $23,200
- Preliminary checks
- All passed at 30 psf
Every size, drawn by the designer
Pick a 3 car garage size.
Each one is a full starting plan: framed, checked for 30 psf of ground snow, 115 mph of wind and a 36 in frost line, and priced. Switch the view to see the frame or the dimensions.
Drawn by the designer from this plan30x40
30x40 three-car garage
Three cars or two and a shop: a 16 ft and a 9 ft door on the long wall, 10 ft walls and a workbench along the back.
- Floor
- 1,200 sq ft
- Walls
- 10 ft
- Doors
- 16' x 7' overhead, 9' x 7' overhead, walk door
- Trusses
- 21 at 2', 30' span
- Slab
- 4 in, frost wall
38 of 38 automated checks passed · 4 external items remain. Local approval not checked. 1 item for your builder or engineer: seismic design category.
Materials about $23,200, before tax and delivery
What it needs
Three single doors or a wide and a single.
The door layout decides the headers and the frost footing. The longer the wall, the more the frame carries.
02Foundation
Over 600 sq ft the footing goes to frost.
Both plans are larger than the 600 sq ft that the code exempts from the frost-depth footing, so each draws a footing and a frost wall, 36 in and 36 in down. Your building department gives the frost depth that counts.
03Snow and wind
Every check runs at your loads.
These starting plans are drawn for 30 psf of ground snow, 115 mph of wind and a 36 in frost line. Change the snow, the wind or the frost line in the designer and the headers, the studs, the trusses and the footing follow. Above 70 psf of ground snow the roof needs an engineer, and the designer says so.
Side by side
Both 3 car garage plans compared.
| Plan | Floor | Walls | Doors | Trusses | Materials, about | Labor if hired, broad reference | Build time | Checks |
|---|---|---|---|---|---|---|---|---|
 24x3624x36 three-car garage | 864 sq ft | 9 ft | 9' x 7' overhead, 9' x 7' overhead, 9' x 7' overhead, walk door | 19 at 2' | $19,400 | $17,280 to $43,200 | 145 to 215 h | Passed, 1 for your builder |
| 30x4030x40 three-car garage | 1,200 sq ft | 10 ft | 16' x 7' overhead, 9' x 7' overhead, walk door | 21 at 2' | $23,200 | $24,000 to $60,000 | 155 to 230 h | Passed, 1 for your builder |
Each row is the starting plan as drawn, for 30 psf of ground snow, 115 mph of wind and a 36 in frost line. Materials are rounded: shelf prices plus the estimated trusses and concrete, before sales tax, delivery, labor and site work. Each plan page keeps the shelf prices, the estimate and the exact sum apart. Labor is the published range for hiring it out, a broad reference and not a quote; build time is total labor hours. Passed means the preliminary checks passed for those loads; local approval is not checked.
What they cost
What a 3 car garage costs.
Materials for both plans at dated store prices. The slab is the biggest single line.
- Materials, about
- $19,400 to $23,200
- Per sq ft of floor
- $19.31 to $22.48
- Labor if hired
- $17,280 to $60,000
- Lines priced
- 43
Excluded: sales tax, delivery, permits, site work and excavation, engineering, electrical, door openers, paint and equipment rental
The garage cost guide breaks it down by group, and the garage cost calculator runs the same numbers for your own size.
Materials for each 3 car garage plan
Shelf prices from Lowe's, Home Depot and Summertown Metals, read Sep 30, 2026 to Oct 25, 2026. Trusses and concrete estimated from published ranges.
Each total is the shelf-price lines plus the trusses and the concrete, estimated from published ranges and kept apart on each plan page.
Labor if hired, 24x36: $17,280 to $43,200. A broad reference from published price guides, not a quote or a forecast for your site.
The $79 builder's plan
Free to plan. $79 to build from.
Every plan above is free to open, check and price. The builder's plan is drawn from the garage you finish, for one payment. These are real sheets from the 34-sheet plan for the 24x24 garage.
Free
- The design in 3D, and every change you make to it
- Every preliminary check, with its rule
- The materials list priced line by line
- A summary PDF of the design and its checks
$79 once
- The dimensioned layout
- Every wall framed, with openings and heights
- The roof frame
- The cut list, the shopping list with store prices and the build, step by step
You check out in the designer, with your design loaded. If the plan has an error, we fix it or refund you within 30 days. Guarantee terms.
Real sheets from the 34-sheet sample plan for the 24x24 garage
01Foundation and slab
02Complete before construction
03Build steps
04Shopping list
Questions
Anything else? Write to us or read the questions about all plans.
Questions about 3 car garage plans
As drawn, the 24x36 comes to about $19,400 in materials and the 30x40 to about $23,200, excluded: sales tax, delivery, permits, site work and excavation, engineering, electrical, door openers, paint and equipment rental. Hiring it out adds a broad $17,280 to $43,200 for the 24x36, a reference from published price guides and not a quote.
Our two start at 24x36 (864 sq ft) with three 9 ft doors and 30x40 (1,200 sq ft) with a wider door and room for a bench. Size it by the widest vehicle and the space to open its doors; the designer checks the doors and the headers, not the parking.
Our 30x40 plan is drawn for three cars: a 16' x 7' door and a second door on the long wall, with a workbench along the back wall when you use it as a shop. The floor is 1,200 sq ft; how the cars fit depends on your vehicles.
Other ways to browse
Not quite the garage you picture?
Your loads, your garage
Start from the 30x40. Make it yours.
Change the size and the options. The framing and the materials list follow every change. Free, no account.
Customize this design, free- Designing
- Free
- Builder's plan
- $79 once
- Account
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