People searching for a conservatory roof cost usually want one number, and there is not one. The published guides give a wide spread because the job itself is wide: a small lean-to with a lightweight sheet is a different task from a large, many-sided room that is being given a tiled roof for the first time. What changes the price is rarely the roof covering alone. It is the frame that has to carry it, the base the frame sits on, the insulation, the ceiling you see from inside, and the paperwork a solid roof triggers. Below are the ranges that national cost guides report, with each driver explained in everyday words and a method for reading a quote so that two of them can be compared fairly. The figures are national, they are not our prices, and they are no substitute for someone looking at your own roof. Your fixed price comes after the survey.
What the published ranges say
Two MyBuilder cost guides, both 2026, give the clearest national picture. The first covers conservatory roof replacement in general and the second covers tiled conservatory roofs. Between them they report the following typical UK ranges.
| Item | Typical UK range |
|---|---|
| Conservatory roof replacement, range | £2,000 to £10,000 and above |
| Conservatory roof replacement, average | About £4,500 |
| Tiled conservatory roof, average | About £4,000 |
| Tiled conservatory roof, per square metre | £50 to £100 |
The spread from the bottom of the range to the top is the first thing to take in. A figure of £2,000 and a figure above £10,000 can both be honest prices for a conservatory roof, because they describe different rooms and different roofs. If a single quote lands far from the average, that is not a warning in itself. It is a prompt to ask what has been included.
The per square metre rate for tiled roofs is worth a word of caution. It describes the tiled covering and the work to lay it, and it is a useful way to compare tiled quotes with each other. It is not the cost of the whole job, because a tiled conservatory roof is built from the rafters up, and the structure, insulation, ceiling and flashings are separate lines.
How the type of roof changes the figure
Four roof types account for almost every replacement, and each has a different cost shape.
Polycarbonate sheet
Twin-wall or multi-wall polycarbonate is the lightest and simplest to fit. It is the material most replacement quotes are measured against, because it is what many older conservatories were built with. It is also the one that most often wears out first, which is why so many people are pricing a replacement in the first place. A new sheet in the old bars restores the weathertightness but not the comfort.
Glass
Modern solar-control glass performs far better than the clear panes of older roofs, and it keeps the room bright. The units are heavier than sheet, the glazing bars have to be sound, and the price reflects the glass itself. If light is the thing you like about the room, glass is a serious candidate, and the conservatory roof options guide sets the three types next to each other.
Tiled roof on timber rafters
A solid tiled roof is built like a small version of the house roof: rafters, insulation, battens and tiles, finished with a plastered or boarded ceiling inside. It has the most parts and the most labour, and it is the type with a published per square metre rate. It also needs the frame and base to be strong enough, which brings in the next group of costs.
Lightweight warm roof
Lightweight systems use insulated panels or thin tile-effect sheets to give a solid roof where the structure cannot take a full tiled one. They sit between polycarbonate and a full tiled roof in how much they change the room, and their price varies with the system chosen. Our guide to solid conservatory roofs describes how both kinds are built.
Size and shape, and why they matter more than area
Floor area gives a rough idea of how much roof there is, but the shape drives the labour. A plain lean-to has one slope, one junction with the house wall and one lower edge. A Victorian-style room with a faceted front has several hips, each of which needs its own rafter, its own flashing and cut tiles or panels. An L-shaped or P-shaped conservatory adds valleys, where two slopes meet, and valleys are among the slowest and most careful parts of any roof.
Height and access matter as well. A conservatory that is single storey and open on a garden side can often be reached with modest scaffolding. One that is tucked between two walls, or sits below a first-floor window, takes longer to work around, and the scaffold and any protection for the neighbouring structure add to the bill. The house wall junction is another cost driver on its own: where the new roof meets the wall, lead flashing is cut into the masonry, and on a Bath stone wall that is done with care so that the joints are not damaged.
The last variable is the frame itself: what it is made from and how it has aged. A tired frame can still support a light roof but may need strengthening for a heavier one. We cover that in the structural stage of the survey, and it can move a price in either direction, and it is far better to learn that before a figure is agreed than once the old roof is off.
What sits outside the roof price
A clear conservatory roof quote lists the roof and the things around it. These are the items that most often make one quote look cheaper than another.
- Frame work. A solid roof is heavier than the glazing it replaces, so the frame may need new or stronger members, or a ring beam at the top of the walls to spread the load.
- The base. Walls and foundations are checked for the extra weight. Most of the time they are fine, but the check has to be made and recorded.
- Building Regulations. Because a solid roof must go through a Building Regulations application, expect a fee and some design information to prepare. Our guide to the Building Regulations for a solid conservatory roof explains what is checked.
- Scaffold and waste. Access, skips and the carrying away of the old roof are real costs and should be named in the quote.
- Inside finishes. Plastering, decoration, spotlights and any wiring for new lights or a fan are often priced separately.
- Gutters and fascias. Replacing the roof is the sensible moment to renew worn guttering at the eaves.
- Roof windows. If you want light from above, rooflights or roof windows are an extra line, and their thermal performance has to meet the figures in Part L.
None of these is unusual. The point is that a total price is only comparable with another if both quotes treat these items the same way. A quote that leaves out the ring beam, the building control fee and the inside finishes will always look better than one that includes them.
What the roof costs across its life
A low fitting price can hide a high cost of ownership. Published lifespans give a rough guide. HomeBuilding reports about 10 years for polycarbonate, and The Eco Experts give 10 to 15 years. Glass roofs are reported at more than 30 years, tiled conservatory roofs at more than 50 years, and The Eco Experts put a solid roof at around 50 years or more. These are typical figures from third-party guides, and the real life of any roof depends on exposure and workmanship.
On that reading, a polycarbonate roof that is replaced again within a dozen or so years may cost more across its life than a solid roof fitted once. That is a rough comparison and not a promise, and the right answer for a seldom-used room can be different from the right answer for a room you want to sit in daily. Comfort belongs in the argument too: a room that is usable in January and bearable in July is worth something that a price table does not show. When the roof is only partly worn, Should I repair or replace my conservatory roof gives the decision rules.
There is also a quieter saving in avoiding repeated small repairs. Resealing bars, patching panels and fitting temporary films each cost a little, and together they can approach the price of doing the job properly. Where repair works, we repair. We say when it will not.
Reading and comparing quotes
When two or three quotes arrive, set them side by side and check the following before looking at the totals.
- Is the roof type the same in each? A lightweight panel roof and a tiled roof are not like for like.
- Does each quote say what is being done to the frame, and does it mention a ring beam or other strengthening if the roof is going solid?
- Is the Building Regulations application included, and who submits it?
- Are scaffold, waste removal and making good listed separately or in the total?
- What is the insulation, and what finish will you see inside?
- What guarantee is given, and is it in writing?
A quote that cannot answer these questions is a quote for a roof you have not yet chosen. It is also worth asking whether the person quoting has been on the roof. A price based on a photograph of the outside alone cannot account for the state of the timbers or the wall junction.
Ask each roofer to list what the price excludes. The exclusions explain most of the gap between quotes.
How we arrive at your price
The survey is free, and the photographs show your own conservatory as we found it. We look at the covering, the glazing bars or rafters, the junction with the house and the state of the frame and base. From that we agree the type of roof with you and write the fixed price down. If the walls are Bath stone or the house is listed, we say what consent questions to settle with B&NES before work begins. The 10-year workmanship guarantee comes in writing with that price, and the old roof leaves with us.
For a more elaborate form of roof, the guide to orangery and lantern-style roofs covers the lantern and orangery styles, and the answer on planning for a solid conservatory roof explains the permission side. The hub page for conservatory roof replacement in Bath has the full overview. To book the survey, phone 01225 285181, use WhatsApp or the enquiry form.