How much will it cost to build a dome or zome? While the unique design of a geodesic dome can be more efficient than conventional structures, the cost will depend on several key factors. This guide will break down the costs to give you a better understanding of what to expect when budgeting your dome or zome build. Whether you’re constructing a greenhouse, cabin, or sauna, we’ve got you covered with cost estimates and tips for making your project more affordable.
From Trillium Domes 30' / 9m Dome Plans - Built by Mac, Domes of Maine
Six Example Dome and Zome Builds to Inspire You - And Their Associated Costs!
What Are the Key Factors That Affect Dome and Zome Building Costs?
Every Trillium Domes plan as of Oct 2024
1. Size of the Dome
The size of your dome is one of the biggest factors in determining the cost. Larger domes require more materials and, if you're hiring help, more labor. However, larger domes also tend to be more efficient on a per-square-foot basis when it comes to materials.
2. Site Location
Where you build your dome will influence the cost in a variety of ways. Some areas have higher labor costs, stricter permitting processes, or more expensive materials. If you live in a rural area, you might also face transportation costs for delivering materials.
3. Materials Sourcing
Your material choices can make a huge difference in your overall cost. Using recycled or locally sourced materials can help cut down costs, but new, premium materials will raise your price point. Trillium Domes offers material plans in product descriptions to help you plan.
4. Foundation Type
Foundations vary in cost, from a basic packed gravel foundation to more complex wood decks or concrete pads. Your foundation choice will depend on the dome’s purpose, the terrain, and your budget.
5. Intended Use
Whether you're building a greenhouse, a small cabin, or a sauna, the intended use will dictate the materials and design choices, impacting the overall cost. Greenhouses typically have lower costs for covers, while insulated cabins and saunas require more expensive materials.
6. Types of Finish
Finishing touches like flooring, doors, and insulation can dramatically alter the final price tag of your dome. A simple greenhouse might not need any flooring, whereas a fully finished cabin will require more expensive insulation and utilities.
What Is the Cost per Square Foot for a Trillium Dome or Zome Build?
In conventional construction, costs are often measured in price per square foot. If you are hiring for a full dome or zome home build, the overall costs are going to be comparable to your price per sq ft to build a conventional home in your area. If you're looking to DIY or get a Trillium Kit, you can save a lot on the overall cost of the project. Here’s how different dome and zome project types compare:
Greenhouse Domes
For a dome greenhouse with the least expensive cover material (such as 9 mil woven poly) and a simple gravel foundation, you can spend as little as $5 per square foot. This makes it one of the most affordable building options for a greenhouse structure.
A high-end greenhouse with solid clear polycarbonate, however, can reach $25 per square foot due to the premium cost of the material.
Cabins, Saunas and Community Spaces
If you’re building a dome or zome for living spaces like cabins or saunas, you’re looking at approximately $25 per square foot in materials for the shell alone. This would include the frame, cover material, door, windows, and roof.
For a fully finished, insulated structure with flooring, insulation, and utilities, the cost typically rises to around $75 per square foot. This is similar to the cost of conventional construction, but with domes, you benefit from the energy efficiency, the unique aesthetics of the design, as well as an overall reduction in materials used.
Labor Costs
If you're commissioning a dome, labor costs can range from $25 to $50 per square foot for the shell, in addition to materials. This includes professional assembly, which ensures the structure is built to last and meets your specific needs. If you're a DIY enthusiast, you can save a significant amount on labor by following Trillium Dome's build plans and assembling the dome yourself.
Six Example Dome and Zome Builds to Inspire You - And Their Associated Costs!
1. 200 Sq. Ft. Greenhouse Dome
From Trillium Domes 15' / 4.5m Dome Plans - Built by Brad in Oregon
Purpose: Year-round gardening in a cold climate
Foundation: Packed gravel ring foundation for easy drainage
Materials: 9 mil woven poly film for the cover, treated wood frame
Cost: Around $1,000 in materials ($5/sq. ft.)
Notes: This affordable greenhouse dome uses a simple gravel foundation and a durable, low-cost cover. Ideal for DIYers looking to keep their costs low while building a highly functional growing space.
2. 300 Sq. Ft. Cabin Zome
From Trillium Domes 20' / 6m Zome Plans - Built by Zen n Den in the UK
Purpose: Short Term Rental
Foundation: Insulated Wood Framed Deck
Materials: Asphalt shingles for roofing, wooden frame, single pane polycarbonate windows and door
Cost: Around $7,500 in materials ($25/sq. ft.)
Notes: This small cabin zome includes windows and a long-lasting asphalt shingle roof, making it perfect for a studio or short term rental. The wood deck foundation provides added insulation and the ability to run utilities. You would probably double the material cost to complete the finishing details such as insulation, interior cladding, flooring, trim and counter tops.
3. 400 Sq. Ft. Cabin Dome Shell
From Trillium Domes 23' / 7m Dome Plans - Built by The W School in Puerto Rico
Purpose: Off-grid cabin or Community Building
Foundation: Wood-framed deck with concrete piers
Materials: Aluminum shakes for roofing, wooden frame, single pane polycarbonate windows and door
Cost: Approximately $10,000 for materials ($25/sq. ft.)
Notes: This community space dome includes windows and a long-lasting aluminum shake roof, making it perfect for year-round living or as a retreat. The wood deck foundation provides added insulation and the ability to run utilities. You would probably double the material cost to complete the finishing details such as insulation, interior cladding, flooring, trim and counter tops.
4. 500 Sq. Ft. Fully Finished Tiny Home Zome
From Trillium Domes 25' / 7.5m Zome Plans - Built by Laurel Zome in Georgia
Purpose: Tiny Home or Short Term Rental
Foundation: Wood-framed deck with concrete piers
Materials: Aluminum shakes for roofing, wooden frame, single pane polycarbonate windows and door, fully insulated with drywall interior, kitchen, bathroom and loft bed
Cost: Approximately $25,000 for materials ($50/sq. ft.)
Notes: This tiny home zome includes windows and a long-lasting aluminum shake roof, making it perfect for year-round living or as a retreat. The wood deck foundation provides added insulation and the ability to run utilities. The frame is 2x6 to provide a large insulation cavity that is finished with a simple drywall interior. This build features a kitchenette, full bathroom and sleeping loft.
5. 600 Sq. Ft. High-End Greenhouse
From Trillium Domes 30' / 9m Dome plans - Built by Karl in Estonia
Purpose: A luxury greenhouse for tropical plants
Foundation: Full gravel pad with stone patio floor
Materials: Twin wall polycarbonate panels for the cover, UV-treated
Cost: Around $15,000 for materials ($25/sq. ft.)
Notes: This greenhouse dome offers a high level of insulation and light transmission, perfect for creating an environment where tropical plants and people can thrive. The twinwall polycarbonate panels provide a welcoming yet private atmosphere.
6. 100 Sq. Ft. Dome Sauna
From Trillium Domes Beginner Bucky Ball Dome Plans - Built by Trillium Domes in Alaska
Purpose: A compact and unique sauna experience
Foundation: Fully insulated wood deck set on pier blocks
Materials: Twin wall polycarbonate, plywood roof deck, underlayment and moss roof
Cost: Around $5,000 for materials ($50/sq. ft.)
Notes: This sauna is extremely efficient, with an entry way that doubles as a changing room, and a sauna room that can comfortably fit 6 adults and reach temperatures of 190F
Feeling Ready to Build Your Own DIY Dome or Zome?
By breaking down the costs associated with a dome or zome build, you now have a clearer idea of what to expect. Whether you’re planning a simple greenhouse or a fully finished cabin, your dome project can be customized to fit your budget. The example builds above show that no matter your purpose, there's a dome design that can meet your needs at various price points.
Ready to start your dome journey? Check out our build plans for detailed materials lists and step-by-step instructions. Have more questions? Leave a comment below or reach out to us for personalized guidance. With the right plan in place, your dome or zome project will be both a creative and cost-effective success!