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20' × 36' Shell • 12 Floor Plans

20' × 36' Floor Plans (720 Sq Ft Base)

Compare 12 build-ready ways to configure a 20-foot by 36-foot structure—including all-living homes, shop-house splits, and 2-story lofts.

20x36 House Exterior
12 Plans
Shell Est: $34,000
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Shell Est: $34,000
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Shell Est: $48,000
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Shell Est: $48,000
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Shell Est: $32,500
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Shell Est: $32,500
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Shell Est: $31,500
View Plan
Shell Est: $31,500
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36' × 20'+ Shop Bay
Garage with Loft / Apartment AbovePlan HG-1193

722 Sq Ft (20x36) 1 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above

902
Sq Ft
1
Beds
1
Baths
540
Shop SF
Shell Est: $46,500
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36' × 20'+ Shop Bay
Garage with Loft / Apartment AbovePlan HG-1194

722 Sq Ft (20x36) 1 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above (Drive-Through Carriage Loft + Primary Suite)

902
Sq Ft
1
Beds
1
Baths
540
Shop SF
Shell Est: $46,500
View Plan
36' × 20'+ Shop Bay
Garage with Loft / Apartment AbovePlan HG-1195

722 Sq Ft (20x36) 2 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above

902
Sq Ft
2
Beds
1
Baths
540
Shop SF
Shell Est: $46,500
View Plan
36' × 20'+ Shop Bay
Garage with Loft / Apartment AbovePlan HG-1196

722 Sq Ft (20x36) 2 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above (Drive-Through Carriage Loft + Primary Suite)

902
Sq Ft
2
Beds
1
Baths
540
Shop SF
Shell Est: $46,500
View Plan

20' × 36' Build Cost Guide, Nearby Sizes & FAQs

Slab takeoff, framing span notes, and comparable footprint sizes

Nearby Footprint Sizes:14'×36' (504 sf)14'×40' (560 sf)16'×30' (480 sf)16'×32' (512 sf)16'×36' (576 sf)16'×40' (640 sf)18'×28' (504 sf)18'×30' (540 sf)

20' Clear-Span Truss & Slab Engineering

A 20' × 36' rectangular building envelope (720 sq ft base area, 112 linear feet of exterior wall) is one of the most cost-effective structural modules in residential construction. Because the 20-foot width can be spanned by single-piece prefabricated wood roof trusses or cold-formed steel rafters, interior walls are non-load-bearing—allowing complete flexibility between open great rooms, split bedroom wings, and drive-in garage bays.

Material Takeoff Baseline (12 Cu. Yds. Concrete / 9 Roof Squares)

Every 4-corner 20x36 layout eliminates expensive hip-and-valley roof framing and minimizes foundation form corners. Builders typically budget 12 cubic yards of 4,000-PSI concrete for the monolithic slab, 95 exterior 2x6 studs (or 14 laminated post-frame columns at 8' o.c.), and 9 squares of standing-seam or ribbed metal roofing.

How many bedrooms and bathrooms fit inside a 20x36 (720 sq ft) floor plan?

A 20' × 36' building footprint (720 sq ft base area) comfortably supports 1 to 3 bedrooms and 1 to 2 bathrooms, or a 1-to-2 bedroom layout with an integrated garage/workshop bay. Browse all 12 vetted 20x36 floor plan variations above to compare room sizes.

How much concrete and roofing material does a 20x36 building require?

A 20' × 36' footprint has 112 linear feet of exterior perimeter wall. Pouring a 4-inch monolithic concrete slab with thickened perimeter grade beams requires approximately 12 cubic yards of ready-mix concrete. A standard gable roof with 18-inch overhangs requires roughly 9 roofing squares (900 sq ft of metal or shingle coverage).

What is the average cost to build a 20x36 house or barndominium?

Across our 12 engineered 20x36 blueprints, dried-in structural shell packages range from $21,600 to $34,560, while full turnkey construction averages $156,417 depending on whether the footprint is configured as all-living space or split between living quarters and an unheated shop bay.