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A geodesic dome greenhouse is a strong, four-season structure, but it's expensive. The leading kit, the Growing Spaces 15 ft Growing Dome, costs $11,950 for 175 sq ft before you pour a foundation. That's well over ten times the cost per square foot of a backyard hoop house. Buy a dome if you garden year-round in a harsh climate and want a permanent showpiece. For a portable dome with published wind ratings, Pacific Domes sells film-covered domes by quote. If you're on a budget, a hoop house or a polycarbonate kit grows the same crops for far less.
- 1Best year-round dome kitGrowing Spaces 15' Growing Dome
Year-round growing in harsh climates; includes an above-ground pond for thermal mass and solar vents/fans.
No published wind or snow rating$11,950typical, Oct 2026 - 2Best family-size domeGrowing Spaces 18' Growing Dome
Family-size year-round dome; DIY assembly with phone support.
No published wind or snow rating$15,950typical, Oct 2026 - 3Best portable, wind-rated domePacific Domes 16' Greenhouse Dome
Portable, fast-to-erect dome with high wind ratings.
Wind150 mphSnow20 psfSee retailertypical, Oct 2026 - 4Patio bubble dome (not a true greenhouse)Garden Igloo 12' Dome
Pop-up bubble dome for a patio winter garden or seating area.
Wind31 mph$1,245typical, Oct 2026
Domes get a lot of attention on Pinterest and Instructables, but most of what ranks for "dome greenhouse" is a DIY photo with no costs or performance data. This page puts the real numbers side by side. All prices and ratings come from the manufacturers' own sites and retailer listings. Where a number is a seller's claim, we say so. We have not built or grown in these domes ourselves.
Is a geodesic dome greenhouse worth it?
| Dome advantage | What it means in practice | The catch |
|---|---|---|
| Strength from triangles | Wind and snow loads spread across the whole frame. Pacific Domes rates its 16 ft dome for 150 mph with no snow. | Only true of an engineered kit, properly anchored. Bubble domes are rated far lower. |
| Lots of volume for its surface area | A sphere encloses the most space for the least surface, so there's less glazing to lose heat through. | The volume is high in the middle. Floor space near the walls is low and awkward. |
| Light from every angle | Low winter sun enters through panels that face it all day. | Panels facing north lose heat without adding much light. Some builders insulate them. |
| Four-season design | Growing Spaces kits include 16 mm multi-wall polycarbonate, a foundation wall, solar vents and fans, and a water tank for thermal mass. | You pay for all of it up front, and the foundation is a separate project. |
| Longevity | Growing Spaces' own comparison claims "20-30 years" against 3-5 years for a hoop house. | That is the seller's rating. It's also comparing a hoop house's film, which is cheap to replace, with the whole dome. |
Our take: a dome is a premium, long-term greenhouse for people who will use it year-round in a cold or high-altitude climate. If you mainly want spring starts and summer tomatoes, spend the money on a bigger conventional greenhouse and a heater instead.
The geodesic dome greenhouse kits worth knowing
Growing Spaces 15' Growing Dome
Growing Spaces in Colorado is the best-known dome greenhouse maker in the US. The 15 ft dome gives you 175 sq ft on a 24 in foundation wall. It comes with pre-cut, color-coded struts, 16 mm multi-wall polycarbonate (an 8 mm twin-wall option is available), a snowshed entry with a 32 x 80 in door, solar vents and fans, and an above-ground pond for thermal mass. The materials for the foundation wall are yours to supply.
Why it stands out
- Complete four-season package: glazing, vents, fan, thermal mass
- 16 mm multi-wall polycarbonate is far more insulating than film
- Color-coded struts and phone support for DIY assembly
Watch out for
- Costs more than a full-size farm high tunnel kit
- Needs a site-built foundation
- The 15 ft product page showed no reviews; homepage testimonials are chosen by the seller
Full specs
- Sizes
- 15 diameter, 175 sq ft
- Footprint
- 15 dia
- Peak height
- 9.4 ft
- Frame
- Pre-cut color-coded struts and framing on a 24 in foundation wall
- Cover
- Multi-wall 16 mm polycarbonate (8 mm twin-wall option)
- Door
- Snowshed entryway, 32 x 80 in door with window
- Warranty
- 'Extended Warranty' is listed as a feature; terms not stated on the product page
Specs from growingspaces.com, growingspaces.com. Prices checked Oct 2026 and change often.
Growing Spaces 18' Growing Dome
The 18 ft dome has 255 sq ft, a wider 36 x 80 in door and the same 16 mm UV-resistant polycarbonate. It's the size where a dome starts to feel like a garden room rather than a tight circle. Bigger domes follow: 22, 26, 33 and 42 ft, with prices scaling to match. The one review on the product page (5/5) praises Growing Spaces' support during the build.
Why it stands out
- More usable floor than the 15 ft, wider door
- Same four-season kit contents
- Phone support during assembly
Watch out for
- The crate weighs 1,875-2,180 lb, so plan delivery access
- The small in-person tour discount only applies if you visit
Full specs
- Sizes
- 18 diameter, 255 sq ft
- Footprint
- 18 dia
- Peak height
- 10.7 ft
- Frame
- Pre-cut color-coded struts on 24 in foundation wall
- Cover
- Multi-wall 16 mm polycarbonate, UV-resistant
- Door
- Snowshed entryway, 36 x 80 in door with window
- Warranty
- 'Extended Warranty' listed; terms not stated on the product page
Specs from growingspaces.com, growingspaces.com. Prices checked Oct 2026 and change often.
Pacific Domes 16' Greenhouse Dome
Pacific Domes makes a 2-frequency dome from 95 galvanized steel struts with a greenhouse vinyl cover. Two people can put it up in about two hours, according to the maker, and it comes with anchoring hardware for any surface. It has the strongest published ratings here: 150 mph with no snow, and 20 lb of snow at 130 mph. The vinyl cover insulates less than multi-wall polycarbonate, though, and pricing is quote-only.
Why it stands out
- Published wind and snow ratings
- Fast to erect, and can be moved
- Round door, 2 roll-up vents and a solar fan included
Watch out for
- Vinyl cover, not rigid glazing
- No public price; you must request a quote
Full specs
- Sizes
- 16 diameter, 195 sq ft
- Footprint
- 16 dia
- Peak height
- 11.75 ft
- Frame
- USA galvanized steel tubes, 95 struts, 2-frequency
- Cover
- Greenhouse vinyl
- Door
- 1 round door with reinforcement hoops; 2 zippered ventilation roll-ups; 1 solar fan
- Snow load
- 20 lb/sq ft
- Wind rating
- 150 mph
Specs from pacificdomes.com. Prices checked Oct 2026 and change often.
Garden Igloo 12' Dome
Search "dome greenhouse" on Amazon and you'll find bubble domes like this one: a 12 ft PVC- or aluminum-framed igloo with a PVC cover. It's fine as a winter patio room or a cover for potted plants. But it's rated for winds up to only 31 mph, the listing is marked obsolete, and owners give it 3.4/5. Don't confuse it with an engineered dome.
Why it stands out
- Fraction of a kit dome's cost
- Walk-in, with a zippered entrance
Watch out for
- 31 mph wind rating; must use the anchor kit
- Listing marked obsolete; mixed ratings
Full specs
- Sizes
- 12 diameter
- Footprint
- 12 dia
- Frame
- PVC or aluminum (spec table)
- Cover
- Thicker PVC meeting 16 CFR 1611.3 flammability
- Door
- Zippered walkway entrance
- Wind rating
- 31 mph
Specs from amazon.com. Prices checked Oct 2026 and change often.
Dome kits compared
| Model | Sizes | Cover | Anchoring | Typical price | Shop |
|---|---|---|---|---|---|
| 15' Growing Dome Small Greenhouse Kit | 15 diameter, 175 sq ft | Multi-wall 16 mm polycarbonate (8 mm twin-wall option) | 24 in foundation wall (owner-supplied foundation materials) | $11,950 | Growing Spaces |
| 18' Growing Dome Greenhouse Kit | 18 diameter, 255 sq ft | Multi-wall 16 mm polycarbonate, UV-resistant | 24 in foundation wall | $15,950 | Growing Spaces |
| Greenhouse Dome 16 ft (5 m) | 16 diameter, 195 sq ft | Greenhouse vinyl | Hardware for any surface type | — | Pacific Domes |
| Garden Igloo - Improved Version V2 - 12' Walk-in Garden Dome Igloo | 12 diameter | Thicker PVC meeting 16 CFR 1611.3 flammability | Anchorage kit (listing stresses using it) | $1,245 | Amazon |
What does a dome greenhouse really cost?
Here are Growing Spaces' published kit prices: 15 ft $11,950, 18 ft $15,950. The 22, 26, 33 and 42 ft domes climb to more than fifty thousand dollars. Then add:
- Foundation: the kit's 24 in foundation wall sits on a base you build, and the bulky foundation materials are owner-supplied. See our greenhouse foundation guide for the options.
- Delivery: crates weigh roughly 1,275-2,180 lb, so you need truck access and help or equipment to unload.
- Assembly time: it's a DIY kit with many parts. Budget several weekends, or pay a builder.
- Permits: a permanent structure on a foundation over your town's size limit almost always needs one.
For comparison, a 10x12 backyard hoop house costs $650 for 120 sq ft. Per square foot, the dome costs well over ten times as much. What you get for the difference is rigid multi-wall glazing, built-in thermal mass and a structure designed for every season. Our greenhouse cost guide puts all greenhouse types on one chart.
Dome vs hoop house vs polycarbonate greenhouse
| Geodesic dome (kit) | Hoop house | Polycarbonate kit | |
|---|---|---|---|
| Cover | 16 mm multi-wall polycarbonate or vinyl | 6 mil film, about 4 years | 4-10 mm twin-wall panels |
| Winter growing | Designed for it | Unheated season extension; can be heated | Good with a heater |
| Snow | Strong frame; maker ratings vary | Needs gothic shape, bracing, sweeping | Ratings published per model |
| Usable floor | Circular; low edges | Rectangular; low edges on round bows | Rectangular; straight walls |
| Benches and shelving | Harder to fit standard benches | Easy down the middle | Easy |
| Relative cost per sq ft | Highest | Lowest | Middle |
Shape matters more than people expect. Standard rectangular benches and shelving waste space against a curved wall, and the edges of a dome are too low to stand in. Growers who love their domes usually plant in a ring of beds around the edge, with the water tank and taller crops in the center. For straight-walled alternatives, see polycarbonate greenhouse kits and walk-in greenhouse kits.
Building a DIY geodesic dome greenhouse
DIY domes are the most popular dome content online, and for good reason: a small film-covered dome can cost a fraction of a kit. What to know before you start:
- Pick a frequency "2V" and "3V" describe how many triangles make up the sphere. Higher frequency means a rounder dome, but more struts and hubs to make. Most backyard builds are 2V or 3V.
- Choose strut material Wood is easy to cut and screw. EMT conduit is stronger and can be flattened and drilled at the ends. PVC is cheapest, but it's flexible and degrades in sunlight.
- Get the lengths right Use an online dome calculator for strut lengths and hub angles. A few millimeters of error repeated across dozens of struts adds up.
- Anchor it A dome is light and aerodynamic, but it still lifts in wind. Fix the base ring to stakes, a timber frame or a foundation.
- Plan the cover Covering many triangles is the hardest part. Film wrapped over the frame is quick but wrinkles. Cut polycarbonate triangles last longer, but every seam needs sealing.
- Ventilate A dome traps heat at the top. Build in a high vent and a low vent, or add a solar fan.
For straight-walled DIY builds that go faster, see our DIY greenhouse guide.
Running a dome through winter
Growing Spaces designs its domes around passive solar heating: multi-wall glazing, a water tank for thermal mass, and solar-powered vents. Even so, dome owners in cold climates often keep a backup heater for the coldest nights. Whatever you use, follow the safety basics in our winter greenhouse guide: use heaters made for greenhouse or outdoor use, plug electrics into a GFCI-protected outlet, and never run an unvented fuel heater in a closed greenhouse.
Mistakes to avoid
- Buying a bubble dome as a greenhouse A 31 mph wind rating and a thin PVC cover won't survive a real winter.
- Underestimating the foundation Kit domes sit on a foundation wall you build. It's a real construction job.
- Filling it with rectangular benches Plan curved or wedge-shaped beds around the edge.
- Skipping ventilation Domes overheat at the crown on sunny days, even in winter.
- Not checking delivery access A 2,000 lb crate needs a driveway and a plan.
Frequently asked questions
How much does a geodesic dome greenhouse cost?
Kit prices start around twelve thousand dollars for Growing Spaces' 15 ft Growing Dome and run past fifty thousand for its 42 ft model, before foundation materials and labor. Pacific Domes sells film-covered domes by quote. Cheap bubble domes exist, but they are patio covers, not greenhouses.
Are dome greenhouses better than regular greenhouses?
For year-round growing in a cold, windy or snowy climate, a well-built dome has real advantages: lots of interior volume for its surface area, strength from its triangulated frame, and room for a water tank as thermal mass. For most gardeners, though, a hoop house or polycarbonate kit grows the same crops for a fraction of the price.
Can a geodesic dome greenhouse handle snow?
The frame shape spreads load well. Pacific Domes rates its 16 ft greenhouse dome for 20 lb of snow at 130 mph wind, and Growing Spaces sells its domes as four-season structures. A dome's lower panels are shallow-sloped, so snow can still sit near the top; check the maker's rating for your area.
Can I build my own geodesic dome greenhouse?
Yes. DIY domes from wood, EMT conduit or PVC struts with film covers are popular projects. The hard parts are cutting dozens of struts accurately, joining them at hubs, and sealing a cover over many angles. Expect far more time than a hoop house of the same floor area.
Why is there a pond in a dome greenhouse?
Growing Spaces kits include an above-ground water tank as thermal mass. Water absorbs heat during the day and releases it at night, which evens out temperature swings in an unheated or lightly heated greenhouse.
Keep reading
Kits by typeHoop house & high tunnel kitsBackyard hoop houses, NRCS-ready high tunnels, caterpillar and low tunnels: which kit fits, and what the price leaves out.
Growing guideWinter greenhouse guideKeep a greenhouse productive in winter: what to grow, how big a heater you need, insulation, thermal mass and safety.
Kits by typePolycarbonate greenhouse kitsTwin-wall vs clear panels, thickness and R-values, plus six aluminum hobby kits from starter 6x8s to snow-country builds.
Cost guideHow much a greenhouse costsGreenhouse prices by type and size, cost per square foot, the hidden extras and what heating really costs per night.
Build guideHow to build a DIY greenhouseFour ways to build a greenhouse yourself, a full 8x10 step-by-step, real material costs and when a kit is the better deal.
Build guideGreenhouse foundations and basesEvery greenhouse base option compared, with step-by-step timber and paver builds, squaring, anchoring and flooring.