Saved design
Flat roof on 10-foot walls
40 × 28 · 2 bed 2 bath
$247,200
estimated total
The same house with every wall at 10 feet and a low-slope roof; the drainage is built into the top pour. The simplest roof to build and the lowest price of the three.
The house
| Outside size | 40 × 29.9 ft |
|---|---|
| Inside area | 1,066 sq ft |
| Footprint | 1,197 sq ft |
| Bedrooms | 2 |
| Baths | 2 |
| Roof | Flat roof |
| Front wall height | 10 ft |
| View windows | 7 |
| Foundation | Slab on grade |
| Wall panels | 34 cast panels, 4 ft wide |
| Roof area | 1,341 sq ft |
The price
$247,200estimated total
$232per sq ft inside
$32,000wall panels
$33,000roof strips
Prices are estimates from the same cost basis as the estimate workbook: concrete at our basis, steel at published list prices, everything else placeholders until quoted. Priced September 8, 2026.
How it is built and finished
- Flat roof
- 34 cast wall panels on steel studs, set with a forklift
- 1,341 sq ft of roof strips, lifted on by crane
- Slab on grade
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Ken Land · mgckland@gmail.com
Roof panel project and wall panel house project, Ken Land. Updated September 8, 2026.