Backyard ADU / Granny FlatPlan HG-1316
722 Sq Ft (24x30) 1 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan
722
Sq Ft
1
Beds
1
Baths
24x30
Shell
Shell Est: $33,500
24' × 30' Shell • 14 Floor Plans
24' × 30' Floor Plans (720 Sq Ft Base)
Compare 14 build-ready ways to configure a 24-foot by 30-foot structure—including all-living homes, shop-house splits, and 2-story lofts.
14 Plans
14 Plans
Backyard ADU / Granny FlatPlan HG-1317
721 Sq Ft (24x30) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan
721
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $33,500
Backyard ADU / Granny FlatPlan HG-1318
721 Sq Ft (24x30) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan (Consolidated Wet-Wall + Open Great Room)
721
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $33,500
A-Frame CabinPlan HG-1319
1,035 Sq Ft (24x30) 1 Bed 1 Bath A-Frame Cabin Floor Plan with Loft
1,035
Sq Ft
1
Beds
1
Baths
24x30
Shell
Shell Est: $46,500
A-Frame CabinPlan HG-1320
1,035 Sq Ft (24x30) 2 Bed 1 Bath A-Frame Cabin Floor Plan with Loft
1,035
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $46,500
A-Frame CabinPlan HG-1321
1,035 Sq Ft (24x30) 2 Bed 1 Bath A-Frame Cabin Floor Plan with Loft (Cathedral Glass Gable + Overlooking Sleeping Loft)
1,035
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $46,500
Modern CabinPlan HG-1322
722 Sq Ft (24x30) 1 Bed 1 Bath Modern Cabin Floor Plan
722
Sq Ft
1
Beds
1
Baths
24x30
Shell
Shell Est: $32,000
Modern CabinPlan HG-1323
721 Sq Ft (24x30) 2 Bed 1 Bath Modern Cabin Floor Plan
721
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $32,000
Modern CabinPlan HG-1324
721 Sq Ft (24x30) 2 Bed 1 Bath Modern Cabin Floor Plan (Consolidated Wet-Wall + Open Great Room)
721
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $32,000
Modular / Prefab CottagePlan HG-1325
722 Sq Ft (24x30) 1 Bed 1 Bath Modular / Prefab Cottage Floor Plan
722
Sq Ft
1
Beds
1
Baths
24x30
Shell
Shell Est: $31,000
Modular / Prefab CottagePlan HG-1326
721 Sq Ft (24x30) 2 Bed 1 Bath Modular / Prefab Cottage Floor Plan
721
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $30,500
Modular / Prefab CottagePlan HG-1327
721 Sq Ft (24x30) 2 Bed 1 Bath Modular / Prefab Cottage Floor Plan (Consolidated Wet-Wall + Open Great Room)
721
Sq Ft
2
Beds
1
Baths
24x30
Shell
Shell Est: $30,500
24' × 30' Build Cost Guide, Nearby Sizes & FAQs
Slab takeoff, framing span notes, and comparable footprint sizes
24' × 30' 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)
24' Clear-Span Truss & Slab Engineering
A 24' × 30' rectangular building envelope (720 sq ft base area, 108 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 (12 Cu. Yds. Concrete / 9 Roof Squares)
Every 4-corner 24x30 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, 92 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 24x30 (720 sq ft) floor plan?
A 24' × 30' 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 14 vetted 24x30 floor plan variations above to compare room sizes.
How much concrete and roofing material does a 24x30 building require?
A 24' × 30' footprint has 108 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 24x30 house or barndominium?
Across our 14 engineered 24x30 blueprints, dried-in structural shell packages range from $21,600 to $34,560, while full turnkey construction averages $152,750 depending on whether the footprint is configured as all-living space or split between living quarters and an unheated shop bay.