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16' × 40' Shell • 17 Floor Plans

16' × 40' Floor Plans (640 Sq Ft Base)

Compare 17 build-ready ways to configure a 16-foot by 40-foot structure—including all-living homes, shop-house splits, and 2-story lofts.

16x40 House Exterior
17 Plans
Shell Est: $23,500
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Shell Est: $30,500
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Shell Est: $30,500
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Shell Est: $43,500
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Shell Est: $43,500
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Shell Est: $29,500
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Shell Est: $29,500
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Shell Est: $28,500
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Shell Est: $28,500
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Shell Est: $32,000
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Shell Est: $32,000
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40' × 16'+ Shop Bay
Garage with Loft / Apartment AbovePlan HG-1092

640 Sq Ft (16x40) 1 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above

800
Sq Ft
1
Beds
1
Baths
480
Shop SF
Shell Est: $42,000
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16' × 40' Build Cost Guide, Nearby Sizes & FAQs

Slab takeoff, framing span notes, and comparable footprint sizes

Nearby Footprint Sizes:14'×32' (448 sf)14'×36' (504 sf)14'×40' (560 sf)16'×20' (320 sf)16'×24' (384 sf)16'×28' (448 sf)16'×30' (480 sf)16'×32' (512 sf)

16' Clear-Span Truss & Slab Engineering

A 16' × 40' rectangular building envelope (640 sq ft base area, 112 linear feet of exterior wall) is one of the most cost-effective structural modules in residential construction. Because the 16-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 (10 Cu. Yds. Concrete / 8 Roof Squares)

Every 4-corner 16x40 layout eliminates expensive hip-and-valley roof framing and minimizes foundation form corners. Builders typically budget 10 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 8 squares of standing-seam or ribbed metal roofing.

How many bedrooms and bathrooms fit inside a 16x40 (640 sq ft) floor plan?

A 16' × 40' building footprint (640 sq ft base area) comfortably supports 1 to 2 bedrooms and 1 bathroom in an open-concept ADU, tiny home, or cabin configuration. Browse all 17 vetted 16x40 floor plan variations above to compare room sizes.

How much concrete and roofing material does a 16x40 building require?

A 16' × 40' footprint has 112 linear feet of exterior perimeter wall. Pouring a 4-inch monolithic concrete slab with thickened perimeter grade beams requires approximately 10 cubic yards of ready-mix concrete. A standard gable roof with 18-inch overhangs requires roughly 8 roofing squares (800 sq ft of metal or shingle coverage).

What is the average cost to build a 16x40 house or barndominium?

Across our 17 engineered 16x40 blueprints, dried-in structural shell packages range from $19,200 to $30,720, while full turnkey construction averages $131,882 depending on whether the footprint is configured as all-living space or split between living quarters and an unheated shop bay.