HOOLIEHAUSHouse Plans & 2D CAD Blueprints
Browse Plans
28' × 30' Shell • 21 Floor Plans

28' × 30' Floor Plans (840 Sq Ft Base)

Compare 21 build-ready ways to configure a 28-foot by 30-foot structure—including all-living homes, shop-house splits, and 2-story lofts.

28x30 House Exterior
21 Plans
Shell Est: $25,500
View Plan
30' × 28'+ Shop Bay
BarndominiumPlan HG-1553

840 Sq Ft (28x30) 2 Bed 2 Bath Barndominium Floor Plan with Shop

505
Sq Ft
2
Beds
2
Baths
336
Shop SF
Shell Est: $25,500
View Plan
30' × 28'+ Shop Bay
Pole Barn Home (Post-Frame)Plan HG-1554

840 Sq Ft (28x30) 1 Bed 1 Bath Pole Barn Home (Post-Frame) Floor Plan with Shop

505
Sq Ft
1
Beds
1
Baths
336
Shop SF
Shell Est: $22,500
View Plan
30' × 28'+ Shop Bay
Pole Barn Home (Post-Frame)Plan HG-1555

840 Sq Ft (28x30) 2 Bed 2 Bath Pole Barn Home (Post-Frame) Floor Plan with Shop

505
Sq Ft
2
Beds
2
Baths
336
Shop SF
Shell Est: $22,500
View Plan
Shell Est: $34,000
View Plan
Shell Est: $34,000
View Plan
Shell Est: $34,000
View Plan
Shell Est: $38,500
View Plan
Shell Est: $38,500
View Plan
30' × 28'
Backyard ADU / Granny FlatPlan HG-1561

841 Sq Ft (28x30) 2 Bed 2 Bath Backyard ADU / Granny Flat Floor Plan (Consolidated Wet-Wall + Open Great Room)

841
Sq Ft
2
Beds
2
Baths
28x30
Shell
Shell Est: $38,500
View Plan
Shell Est: $54,000
View Plan
Shell Est: $54,000
View Plan

28' × 30' Build Cost Guide, Nearby Sizes & FAQs

Slab takeoff, framing span notes, and comparable footprint sizes

Nearby Footprint Sizes:16'×40' (640 sf)18'×36' (648 sf)20'×30' (600 sf)20'×32' (640 sf)20'×36' (720 sf)20'×40' (800 sf)22'×28' (616 sf)22'×30' (660 sf)

28' Clear-Span Truss & Slab Engineering

A 28' × 30' rectangular building envelope (840 sq ft base area, 116 linear feet of exterior wall) is one of the most cost-effective structural modules in residential construction. Because the 28-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 (14 Cu. Yds. Concrete / 10 Roof Squares)

Every 4-corner 28x30 layout eliminates expensive hip-and-valley roof framing and minimizes foundation form corners. Builders typically budget 14 cubic yards of 4,000-PSI concrete for the monolithic slab, 99 exterior 2x6 studs (or 15 laminated post-frame columns at 8' o.c.), and 10 squares of standing-seam or ribbed metal roofing.

How many bedrooms and bathrooms fit inside a 28x30 (840 sq ft) floor plan?

A 28' × 30' building footprint (840 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 21 vetted 28x30 floor plan variations above to compare room sizes.

How much concrete and roofing material does a 28x30 building require?

A 28' × 30' footprint has 116 linear feet of exterior perimeter wall. Pouring a 4-inch monolithic concrete slab with thickened perimeter grade beams requires approximately 14 cubic yards of ready-mix concrete. A standard gable roof with 18-inch overhangs requires roughly 10 roofing squares (1,000 sq ft of metal or shingle coverage).

What is the average cost to build a 28x30 house or barndominium?

Across our 21 engineered 28x30 blueprints, dried-in structural shell packages range from $25,200 to $40,320, while full turnkey construction averages $155,643 depending on whether the footprint is configured as all-living space or split between living quarters and an unheated shop bay.