Garden Dome vs Conservatory: Which Is the Better Choice?
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Quick answer
Choose a garden dome for fast, flexible extra space at a fraction of the cost, and a conservatory for a permanent extension. GeoDomeX domes start from £899, against £15,000+ for a typical conservatory or glass garden room; most owners build one in an afternoon or a day, and it's usually permitted development. A conservatory adds fixed floor area and may raise resale value, but costs far more, takes weeks to build and often needs planning and building regulations approval.
The honest trade-off
These solve the same problem (more usable space, more daylight) at completely different price points and commitment levels.
| Factor | Garden dome (GeoDomeX) | Conservatory or glass garden room |
|---|---|---|
| Cost | From £899 to a few thousand pounds | £15,000-£40,000+ |
| Install time | An afternoon or a day; numbered panels bolted together | Weeks of building work |
| Planning permission | Usually permitted development (check locally) | Often required |
| Building regulations | Usually exempt as a detached garden room with no sleeping accommodation | Often apply |
| Foundations | Sits on a decking or platform base (or level ground for the Mini), anchored | Permanent footings |
| Reversible or moveable | Yes: can be relocated or removed | No: permanent |
| Adds fixed floor area | No | Yes |
| Disruption | Minimal | Significant |
Planning and building regulations still depend on your property: check with your local planning authority, especially for listed buildings, conservation areas, siting near boundaries and height (rules differ in Scotland, Wales and Northern Ireland). A dome is a garden room, not a dwelling; our guide to building regulations for garden domes explains when those rules apply.
Why a dome wins on speed and cost
A conservatory is a building project: design, planning, footings, glazing, weeks of trades and disruption. A GeoDomeX dome arrives as individually numbered, engraved panels that are bolted together with nuts and bolts, with no specialist tools, and most owners build one in an afternoon or a day (4-6 hours for the Mini and Standard, 8-12 hours for the Large). No building crew, no footings and, in most cases, no planning application. Prefer not to build it yourself? Our Built for you service can build and anchor it for you. You get a year-round room that keeps out wind and rain this month, not next season, at a small fraction of the cost.
It's also reversible: a dome can be relocated within the garden or taken with you if you move. A conservatory is permanent: an asset if you stay, a sunk cost if you don't.
Where a conservatory wins
In fairness: a conservatory adds permanent floor area that can lift a home's value and is fully integrated with the house (direct internal access, mains heating, building-regs insulation). If you want a fixed extension you'll never move and you have the budget and appetite for a building project, a conservatory does that. A dome is a standalone garden room, not an extension of the house footprint.
Is a dome warm enough to replace a conservatory?
For much of the year, yes. Solid polycarbonate panels block wind and rain, and with heating and ventilation a dome is comfortable through autumn and winter. Polycarbonate isn't an insulator, though, so it won't match a fully insulated, building-regs conservatory in the depths of winter without heating; our guide on how to heat a garden dome covers the options. As a usable, year-round space it covers most of the same uses (dining, office, lounge, hosting) for much less outlay.
Which should you choose?
- Choose a garden dome if you want affordable, fast, flexible space, usually without a planning application, and the option to move or remove it later.
- Choose a conservatory if you want a permanent, value-adding extension with full internal integration and you're prepared for the cost and build.
If you've priced up a conservatory and want a separate garden room for flexible use, GeoDomeX is our recommendation for value and speed. The sliding door, windows, roof vents, anchoring brackets and LED kit are included, and you can choose Ultra for most home gardens or Extreme for our strongest 3 mm home or hospitality specification.
Frequently asked questions
Does a garden dome cost less than a conservatory?
Far less. GeoDomeX domes start from £899 and run to a few thousand pounds with a base and extras, while conservatories typically start around £15,000 and rise well beyond.
Do you need planning permission for a garden dome instead of a conservatory?
Usually not. A garden dome of this size normally counts as permitted development as a garden structure, while conservatories often need planning permission. Always confirm with your local planning authority for your size and site, especially for listed buildings and conservation areas.
Can a garden dome be used year-round like a conservatory?
Yes, with heating and ventilation. Solid polycarbonate panels keep out wind and rain, and a heater keeps it comfortable through the colder months.
Does a garden dome add value to my home like a conservatory?
A conservatory adds permanent floor area that can raise value. A dome is a standalone, moveable garden room rather than a fixed extension, so think of it as usable space and garden appeal you can take with you.
Which is quicker to get?
A dome. It's held in UK stock with free next-day delivery to eligible UK destinations when you order by 2pm, Monday to Friday, and most owners build it in an afternoon or a day. A conservatory is a multi-week building project.