Blog>Cost Guides>How much does a lean-to conservatory cost?
Last updated: 15 August 2024
How much does a lean-to conservatory cost?
If you're thinking about building a lean-to conservatory, this guide will help you to understand how much it might cost, and what to budget. Keep reading to find out more...

Fast Facts
The average cost of a lean-to conservatory ranges from £8,100 to £26,400+
Polycarbonate lean-to conservatories tend to be the cheapest option
For accurate costs, speak to experience conservatory installers in your area
Lean-to conservatory costs
Below are some of the average costs for building a lean-to conservatory in the UK:
Type of roof | Size of conservatory | Price - Range low | Price - Range high | Average UK Cost (+VAT) |
---|---|---|---|---|
Polycarbonate | 3m x 3m | £8,100 | £11,880 | £9,990 |
Glass | 3m x 3m | £900 | £13,200 | £11,100 |
Tiled | 3m x 3m | £18,000 | £26,400 | £22,200 |
Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now |
Depending on your taste for materials and size preferences, a lean-to conservatory can cost anything from around £8,100to£26,400+.
Quotes for a new conservatory will usually include costs for:
Groundworks and base
Walls and frames
Roofing
Glazing
Any building work to the aperture of your home
They may also cover insulation and any finishing work, such as plastering or painting.
How much does a small lean-to conservatory cost?
A small lean-to can cost from £8,100.
When cost is a concern, go small. Adding a small lean-to conservatory can be an affordable way to add some extra indoor/outdoor living space to your home.
They also have the added benefit of letting light in and potentially adding value to your home.
Even a relatively small 3m x 3m lean-to conservatory can give you a good amount of extra space.

Factors affecting the cost of a lean-to conservatory
The exact cost of your lean-to conservatory will depend on various factors:
Size of the conservatory
Structure of the conservatory
Type and material of the roof
Finishing touches, such as flooring, extra insulation, decorative glass, extra-thick glazing and furnishing
As a general rule, tiled roof conservatories tend to be the most expensive, and polycarbonate roofs are the cheapest.
See the tradespeople we've checked and recommend for your job
FAQs
Do I need planning permission for a lean-to conservatory?
Conservatories generally fall under the category of ‘permitted development’, which means that you shouldn’t need planning permission to install one.
However, there are exceptions. For example, you may need to seek permission if you’d like a lean-to conservatory with a floor space larger than 30 square metres.
Similarly, if your property is on designated land you may need permission. If in doubt, speak to your local planning office before installing your conservatory.
Will a lean-to conservatory add value to my house?
A well-built, good-quality conservatory should pay for itself when it comes to adding value to your house.
But a high-end conservatory can contribute even more, potentially adding up to 10-25% more in value than you paid for it.
Do I need an accredited installer?
You should always ensure you use a trained and qualified conservatory installer, preferably one who is FENSA or DGCOS registered.
Ready to get started with your conservatory project? Use our search bar below to find local professionals to build the perfect conservatory.
See the tradespeople we've checked and recommend for your job
More Cost Guides
More Windows / Doors / Conservatories Articles
See the tradespeople we've checked and recommend for your job