Backyard ADU / Granny FlatPlan HG-1052
450 Sq Ft (16x28) 1 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan
450
Sq Ft
1
Beds
1
Baths
16x28
Shell
Shell Est: $21,500
16' × 28' Shell • 5 Floor Plans
16' × 28' Floor Plans (448 Sq Ft Base)
Compare 5 build-ready ways to configure a 16-foot by 28-foot structure—including all-living homes, shop-house splits, and 2-story lofts.
5 Plans
5 Plans
A-Frame CabinPlan HG-1053
644 Sq Ft (16x28) 1 Bed 1 Bath A-Frame Cabin Floor Plan with Loft
644
Sq Ft
1
Beds
1
Baths
16x28
Shell
Shell Est: $30,500
Modern CabinPlan HG-1054
450 Sq Ft (16x28) 1 Bed 1 Bath Modern Cabin Floor Plan
450
Sq Ft
1
Beds
1
Baths
16x28
Shell
Shell Est: $20,500
Modular / Prefab CottagePlan HG-1055
450 Sq Ft (16x28) 1 Bed 1 Bath Modular / Prefab Cottage Floor Plan
450
Sq Ft
1
Beds
1
Baths
16x28
Shell
Shell Est: $20,000
Tiny Home on FoundationPlan HG-1056
450 Sq Ft (16x28) 1 Bed 1 Bath Tiny Home on Foundation Floor Plan
450
Sq Ft
1
Beds
1
Baths
16x28
Shell
Shell Est: $22,500
16' × 28' Build Cost Guide, Nearby Sizes & FAQs
Slab takeoff, framing span notes, and comparable footprint sizes
16' × 28' Build Cost Guide, Nearby Sizes & FAQs
Slab takeoff, framing span notes, and comparable footprint sizes
Nearby Footprint Sizes:12'×24' (288 sf)12'×28' (336 sf)12'×32' (384 sf)14'×24' (336 sf)14'×28' (392 sf)14'×32' (448 sf)14'×36' (504 sf)14'×40' (560 sf)
16' Clear-Span Truss & Slab Engineering
A 16' × 28' rectangular building envelope (448 sq ft base area, 88 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 (8 Cu. Yds. Concrete / 6 Roof Squares)
Every 4-corner 16x28 layout eliminates expensive hip-and-valley roof framing and minimizes foundation form corners. Builders typically budget 8 cubic yards of 4,000-PSI concrete for the monolithic slab, 75 exterior 2x6 studs (or 11 laminated post-frame columns at 8' o.c.), and 6 squares of standing-seam or ribbed metal roofing.
How many bedrooms and bathrooms fit inside a 16x28 (448 sq ft) floor plan?
A 16' × 28' building footprint (448 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 5 vetted 16x28 floor plan variations above to compare room sizes.
How much concrete and roofing material does a 16x28 building require?
A 16' × 28' footprint has 88 linear feet of exterior perimeter wall. Pouring a 4-inch monolithic concrete slab with thickened perimeter grade beams requires approximately 8 cubic yards of ready-mix concrete. A standard gable roof with 18-inch overhangs requires roughly 6 roofing squares (600 sq ft of metal or shingle coverage).
What is the average cost to build a 16x28 house or barndominium?
Across our 5 engineered 16x28 blueprints, dried-in structural shell packages range from $13,440 to $21,504, while full turnkey construction averages $94,500 depending on whether the footprint is configured as all-living space or split between living quarters and an unheated shop bay.