In short: a like-for-like glass or polycarbonate conservatory roof replacement typically costs £1,900–£6,800 depending on size, while converting to a solid, insulated tiled roof runs £3,800–£15,000, with branded systems such as Guardian Warm Roof usually landing at £7,500–£14,500 fitted. A solid roof conversion also needs Building Regulations sign-off, which a simple glass swap usually doesn’t. Get at least three itemised quotes before committing, and treat any single-company blog quoting only high numbers with caution.
Roofers in Aylesbury and Buckinghamshire to browse
If you’re getting quotes for a conservatory roof job locally, these directory categories cover the trades involved. Solid tiled roof conversions are structural, pitched-roof work, so general & pitched roofing contractors are usually the most relevant starting point.
- General & pitched roofing contractors – the closest match for solid, insulated tiled conservatory roof conversions
- Flat roofing specialists
- Leadwork specialists
- Roof & gutter cleaning
- Roofing supplies & materials
How much does a conservatory roof replacement cost?
Prices below are UK-wide averages gathered from independent quoting sites, not a quote for your job. Your final price depends on the roof size, the material you’re replacing it with, and how much structural work the existing frame needs.
- Small conservatory (up to 3m x 3m), like-for-like glass or polycarbonate: roughly £1,900–£3,400
- Small conservatory, converted to a solid insulated tiled roof: roughly £3,800–£5,200
- Large conservatory (up to 5m x 5m), like-for-like glass or polycarbonate: roughly £3,500–£6,800
- Large conservatory, converted to a solid insulated tiled roof: roughly £6,500–£8,500, rising towards £15,000 for bigger or more complex roofs
- Labour typically makes up 30–40% of the total, with a two-person team charging £300–£500 a day, broadly consistent with the £280–£360 day rate we’ve seen quoted for South East trades generally
- Most jobs take 1–3 days on site, less than a full roof replacement, because a conservatory roof is a smaller, usually single-storey structure
- Scaffolding is often not needed for conservatory roof work, since it’s typically ground-floor and reachable from a tower or podium, which is one reason conservatory roofs cost less than a full house re-roof
Real Buckinghamshire/UK prices
Independent UK quoting site MyJobQuote breaks costs down by size and material, giving a small (up to 3m x 3m) solid tiled roof at £3,800–£5,200 and a large (up to 5m x 5m) solid tiled roof at £6,500–£8,500, with polycarbonate and glass roughly £175–£400 per m² against £300–£600 per m² for solid tiled.[1] Checkatrade’s guide lands in a similar overall band, quoting a conservatory roof replacement at £3,500–£12,000 depending on material and size.[2]
For branded insulated roof systems specifically, review site Expertsure quotes Guardian Warm Roof, the most widely fitted system in the UK, at £7,500–£14,500 fitted, with most homeowners paying £9,000–£11,500 for a typical 14–18m² Edwardian or Victorian conservatory, and London running 10–15% above the national average.[3] That’s higher than a generic solid tiled roof because it’s a named, insurance-backed system rather than a generic build-up, so it isn’t directly comparable to the DIY-material figures above.
Worth flagging: a few contractor and marketing-style blogs we checked quote considerably higher figures, for example one citing £6,300 for a small polycarbonate roof and over £18,000 for a large glass roof, well above every independent aggregator we cross-checked. We haven’t used those numbers here because they look inflated against the wider evidence, and a single company’s own blog isn’t a reliable price benchmark on its own. Treat any quote that sits far above the ranges above as one to question, not automatically accept.
Glass or polycarbonate replacement vs a solid tiled roof
The two options solve different problems, and the price gap reflects that.
- Cost: like-for-like glass or polycarbonate is cheaper, roughly half the price of a solid conversion for the same size conservatory, because it’s a panel swap rather than a structural rebuild.
- Temperature and insulation: a solid tiled roof is insulated, so it cuts summer overheating and winter heat loss, which is the main reason homeowners upgrade rather than just replacing like-for-like. A glass or polycarbonate roof, even a modern high-spec one, will never insulate as well as a solid roof with a proper U-value.
- Light: glass keeps the most natural light, polycarbonate is a step down, and a solid tiled roof loses the overhead light entirely, though most systems add roof lanterns or Velux-style windows to compensate.
- Planning permission: for most homes, a like-for-like glass or polycarbonate swap and a solid roof conversion are both covered by Permitted Development, provided the roof doesn’t increase the conservatory’s height, footprint or volume. Listed buildings, conservation areas and National Parks are common exceptions, so it’s worth a quick check with your local planning authority before committing.[4]
- Building Regulations: this is the key difference. A solid roof is treated as a permanent fixture, so it typically needs Building Control sign-off to confirm the existing frame and base can take the extra weight and that insulation meets current standards. A simple glass-for-glass or poly-for-poly swap usually doesn’t trigger this.[5]
What actually drives the price
- Size and shape: a simple lean-to costs less than a hipped, Victorian or P-shaped roof with more valleys, ridges and cutting involved.
- Material choice: polycarbonate is cheapest, glass sits in the middle, solid insulated tile is the most expensive but the only option that meaningfully changes the room’s temperature.
- Structural work needed: solid roofs are heavier, so if the existing frame or base needs reinforcing before it can take the load, that adds to the bill on top of the roof itself.
- Access: a roof that’s easy to reach from ground level with a tower costs less to work on than one boxed in by fencing, extensions or a tight side passage.
- Rooflights and lanterns: adding windows or a lantern to a solid roof to bring light back in is a genuine extra cost, not something to assume is included in a headline price.
Conservatory roof quote red flags
- A quote that doesn’t specify whether it includes Building Regulations approval for a solid roof conversion. If it’s not itemised, ask.
- No breakdown between the roof material, labour, and any structural reinforcement to the existing frame or base. A single lump figure makes it hard to compare quotes fairly.
- Pressure to sign on the day, or a “today only” discount. A conservatory roof is not an emergency repair; there’s no reason you can’t take a quote away and compare it.
- A price that’s dramatically higher or lower than the ranges above with no explanation of why your job is different.
For the full checklist on spotting inflated or dishonest roofing quotes, see the full roofing cost guide.
Related guides
If you’re weighing up conservatory options against other roofing work, these cover related jobs: the How Much Does a New Roof Cost in the UK? pillar guide for full roof replacement costs, Flat Roof Replacement Cost if part of your property has a flat roof, and Roof Tile & Slate Replacement Cost if you’re matching tiles on the main house to a new conservatory roof.
Do I need planning permission for a solid conservatory roof?
Usually not. Most solid conservatory roof conversions fall under Permitted Development because they don’t change the conservatory’s height, footprint or volume. Exceptions include listed buildings, conservation areas and National Parks, so it’s worth a quick check with your local planning authority before work starts.
Is a solid roof worth the extra cost over glass or polycarbonate?
It depends on how you use the room. If the conservatory is too hot in summer and too cold in winter to sit in comfortably, a solid insulated roof genuinely fixes that and can make the room usable year-round. If you already use the conservatory happily as-is and just need the roof replaced, a like-for-like glass or polycarbonate swap is the cheaper, faster option.
How long does a conservatory roof replacement take?
Based on independent UK cost guides, most jobs take 1 to 3 days on site: around a day for a small like-for-like swap, up to 2–5 days for a larger solid tiled conversion with structural work involved.
Can I replace a conservatory roof myself?
A like-for-like glass panel or polycarbonate sheet swap is sometimes attempted by confident DIYers, though working at height on glass is a real safety risk. A solid tiled roof conversion is structural work that needs Building Regulations sign-off, so it should be carried out and certified by a qualified contractor, not done as a DIY project.
Does a conservatory roof replacement need Building Regulations sign-off?
A solid tiled roof conversion generally does, because it’s treated as a permanent structural change and needs Building Control to confirm the frame and base can take the extra weight. A simple like-for-like glass or polycarbonate replacement usually doesn’t trigger Building Regulations, but check with your local authority if you’re unsure.