Homerun
30x40 is the most-quoted metal building size we sell at Homerun. It's the sweet spot: 1,200 square feet, big enough for a 4-bay shop or 3-car garage with workspace, small enough that the foundation and erection costs stay manageable. Pricing varies more than buyers expect, and most of the swing comes from a few specific options. Here's the breakdown.
30x40 kit-only pricing in 2026
- Tubular steel (12-gauge), 10ft eaves, 1 walk door, 1 roll-up: $14,000–$18,000
- Tubular steel (12-gauge), 12ft eaves, fully enclosed, basic insulation: $19,000–$24,000
- Red iron, 14ft eaves, fully enclosed, no insulation: $22,000–$28,000
- Red iron, 16ft eaves, fully enclosed, R-13 insulation, 2 doors: $26,000–$32,000
Kit-only means the steel package — primary frame, secondary frame, sheeting, fasteners, doors, and engineering. It does not include the foundation, concrete slab, electrical, plumbing, interior finish, or erection labor.
What drives the price up or down
Eave height. Going from 10ft to 14ft adds about $2,000. 14ft to 18ft adds another $3,000–$4,000. Tall eaves matter for RV storage, lift access, and overhead doors above 10ft.
Framing type. Tubular 12-gauge cold-formed steel runs roughly 25–35% less than red iron (hot-rolled I-beam) for the same dimensions. Red iron handles longer clear spans without interior columns and is the standard for buildings over 40ft wide.
Door package. Each 10x10 roll-up door adds $800–$1,400. A 12x14 roll-up runs $1,500–$2,400. Insulated overhead doors cost roughly 40% more than non-insulated.
Insulation. Standard fiberglass batts with vinyl-faced backing add $2,500–$4,500 for a 30x40 building. Spray foam (closed-cell) is double that or more, but offers better R-value per inch.
Wind and snow load. Buildings engineered for high-wind coastal codes (140+ mph) or heavy snow loads (50+ psf) cost 8–15% more than standard. The kit ships with wind and snow load designed to your project address — verify this when you get a quote.
All-in turnkey 30x40 cost (with foundation and erection)
If you're hiring out everything, expect to add roughly $30K–$50K to the kit price for slab, erection labor, doors, insulation, electrical rough-in, and finish work. A turnkey 30x40 shop in 2026 typically lands between $50K and $90K depending on finish level and region.
Owner-builders erecting their own kit save $8K–$15K on labor. Pouring your own slab (with a small crew) saves another $5K–$8K. The owner-builder all-in for a 30x40 typically lands $32K–$55K.
How long does a 30x40 take to build?
Kit lead time: 4–8 weeks from order to delivery. Foundation pour and cure: 3–4 weeks total (including site prep, forming, pour, cure). Erection: 3–7 days for a 2–3 person crew. Total project time from order to closed-in shell: 8–14 weeks.
Common 30x40 use cases and configurations
Shop/garage: 12ft eaves, 1–2 roll-up doors, walk door, basic insulation, gravel or concrete floor. Equipment storage: 10ft eaves, 1 large roll-up, no insulation, dirt or gravel floor. RV storage: 14–16ft eaves, 12x14 door, no insulation. Workshop with office: 12ft eaves, 1 roll-up, 1 walk door, R-13 insulation, partition wall, dedicated electrical service.
What to ask before you order
- Is the kit engineered for my specific project address (wind/snow/seismic load)?
- What's the freight cost to my zip code?
- Are anchor bolts and base plates included or extra?
- What gauge are the wall sheets and roof panels?
- What's the paint warranty on the panels?
- Is there a kit assembly manual included?
Get a real quote on a 30x40 in your color and door configuration — text our team at 765-748-6067 or use the quote form. We'll have a number back to you within 24 hours.