Sierra 20
20ft Diameter
Our most versatile small dome, the Sierra 20 delivers an impressive 314 sq ft of living space. Perfect for guest houses, home offices with room to grow, or starter glamping units. The balanced proportions offer excellent height-to-width ratio for comfortable standing room throughout.
314 sq ft
Floor Area
12 ft
Height
100 mph
Wind Rating
Select Package
Free Shipping
10-Year Warranty
Made in USA
Expert Support
Dimensions & Ratings
- Diameter
- 20 ft
- Height
- 12 ft
- Floor Area
- 314 sq ft
- Wind Rating
- 100 mph
- Snow Load
- 30 psf
Materials & Construction
- Frame Material
- Aircraft-grade aluminum
- Cover Material
- UV-resistant PVC
- Connectors
- Galvanized steel
- Hardware
- Stainless steel
- Foundation
- Anchor system included
Included in Essential Package
- Heavy-duty aluminum frame
- Insulated PVC cover
- Premium door with window
- Two sidewall windows
- Foundation anchoring system
Available Upgrades
- Additional windows (+$450 each)
- Skylight package (+$800)
- Bay window (+$1,200)
- French door upgrade (+$950)
- Insulated flooring kit (+$2,500)
- HVAC pre-installation (+$600)
DIY Installation
This dome can be assembled by 2-3 people in 2-4 days with basic tools. We provide comprehensive documentation and video guides.
- Step-by-step assembly manual
- Video tutorial series
- Phone support during assembly
- Foundation guide included
Professional Installation
Prefer a turnkey solution? Our network of certified installers can handle everything.
- Site assessment included
- Foundation preparation
- Complete dome assembly
- Final inspection & walkthrough
Installation pricing varies by location. Contact us for a quote.
4.9 out of 5
Based on 47 reviews
Michael T.
Colorado
Exceeded all expectations. The assembly was straightforward with the provided guides, and it looks absolutely stunning on our property.
Sarah K.
Oregon
We use this for Airbnb and it's been booked solid since day one. Guests love the unique experience and we love the income.
David R.
Vermont
Quality is outstanding. Survived our first New England winter with no issues whatsoever.
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Questions About This Dome?
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