Backyard ADU / Granny FlatPlan HG-1285
578 Sq Ft (24x24) 1 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan
578
Sq Ft
1
Beds
1
Baths
24x24
Shell
Shell Est: $26,500
24' × 24' Shell • 17 Floor Plans
24' × 24' Floor Plans (576 Sq Ft Base)
Compare 17 build-ready ways to configure a 24-foot by 24-foot structure—including all-living homes, shop-house splits, and 2-story lofts.
17 Plans
17 Plans
Backyard ADU / Granny FlatPlan HG-1286
577 Sq Ft (24x24) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan
577
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $26,500
Backyard ADU / Granny FlatPlan HG-1287
577 Sq Ft (24x24) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan (Consolidated Wet-Wall + Open Great Room)
577
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $26,500
A-Frame CabinPlan HG-1288
828 Sq Ft (24x24) 1 Bed 1 Bath A-Frame Cabin Floor Plan with Loft
828
Sq Ft
1
Beds
1
Baths
24x24
Shell
Shell Est: $37,500
A-Frame CabinPlan HG-1289
828 Sq Ft (24x24) 2 Bed 1 Bath A-Frame Cabin Floor Plan with Loft
828
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $37,500
A-Frame CabinPlan HG-1290
828 Sq Ft (24x24) 2 Bed 1 Bath A-Frame Cabin Floor Plan with Loft (Cathedral Glass Gable + Overlooking Sleeping Loft)
828
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $37,500
Modern CabinPlan HG-1291
578 Sq Ft (24x24) 1 Bed 1 Bath Modern Cabin Floor Plan
578
Sq Ft
1
Beds
1
Baths
24x24
Shell
Shell Est: $25,500
Modern CabinPlan HG-1292
577 Sq Ft (24x24) 2 Bed 1 Bath Modern Cabin Floor Plan
577
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $25,500
Modern CabinPlan HG-1293
577 Sq Ft (24x24) 2 Bed 1 Bath Modern Cabin Floor Plan (Consolidated Wet-Wall + Open Great Room)
577
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $25,500
Modular / Prefab CottagePlan HG-1294
578 Sq Ft (24x24) 1 Bed 1 Bath Modular / Prefab Cottage Floor Plan
578
Sq Ft
1
Beds
1
Baths
24x24
Shell
Shell Est: $24,500
Modular / Prefab CottagePlan HG-1295
577 Sq Ft (24x24) 2 Bed 1 Bath Modular / Prefab Cottage Floor Plan
577
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $24,500
Modular / Prefab CottagePlan HG-1296
577 Sq Ft (24x24) 2 Bed 1 Bath Modular / Prefab Cottage Floor Plan (Consolidated Wet-Wall + Open Great Room)
577
Sq Ft
2
Beds
1
Baths
24x24
Shell
Shell Est: $24,500
24' × 24' Build Cost Guide, Nearby Sizes & FAQs
Slab takeoff, framing span notes, and comparable footprint sizes
24' × 24' Build Cost Guide, Nearby Sizes & FAQs
Slab takeoff, framing span notes, and comparable footprint sizes
Nearby Footprint Sizes: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'×24' (384 sf)
24' Clear-Span Truss & Slab Engineering
A 24' × 24' rectangular building envelope (576 sq ft base area, 96 linear feet of exterior wall) is one of the most cost-effective structural modules in residential construction. Because the 24-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 (9 Cu. Yds. Concrete / 7 Roof Squares)
Every 4-corner 24x24 layout eliminates expensive hip-and-valley roof framing and minimizes foundation form corners. Builders typically budget 9 cubic yards of 4,000-PSI concrete for the monolithic slab, 82 exterior 2x6 studs (or 12 laminated post-frame columns at 8' o.c.), and 7 squares of standing-seam or ribbed metal roofing.
How many bedrooms and bathrooms fit inside a 24x24 (576 sq ft) floor plan?
A 24' × 24' building footprint (576 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 24x24 floor plan variations above to compare room sizes.
How much concrete and roofing material does a 24x24 building require?
A 24' × 24' footprint has 96 linear feet of exterior perimeter wall. Pouring a 4-inch monolithic concrete slab with thickened perimeter grade beams requires approximately 9 cubic yards of ready-mix concrete. A standard gable roof with 18-inch overhangs requires roughly 7 roofing squares (700 sq ft of metal or shingle coverage).
What is the average cost to build a 24x24 house or barndominium?
Across our 17 engineered 24x24 blueprints, dried-in structural shell packages range from $17,280 to $27,648, while full turnkey construction averages $121,441 depending on whether the footprint is configured as all-living space or split between living quarters and an unheated shop bay.