Quick answer: Conservatory roof replacement costs in the UK in 2026 range from £1,500–£4,500 for polycarbonate up to £8,000–£22,000 for a full solid tiled roof conversion depending on conservatory size, shape and location

A leaking polycarbonate roof that turns your conservatory into an oven in summer and an icebox in winter is one of the most common frustrations for UK homeowners. Replacing it transforms a barely-used space into a genuine year-round room — but the range of options and prices can be overwhelming. Glass, solid tiled, lightweight tiled, polycarbonate, Cosy Panels — every installer seems to quote something different for what sounds like the same job.This guide gives you real 2026 conservatory roof replacement costs for every roof type, explains what drives the price differences, and helps you understand exactly what you are getting before you speak to a single installer.

Conservatory Roof Replacement Cost by Roof Type (2026)

What Affects Your Conservatory Roof Replacement Cost?

Six variables drive the price of a conservatory roof replacement. Understanding them takes five minutes and will help you spot immediately whether a quote you receive is realistic or not.

1. Roof Type
This is the biggest single variable and the decision that shapes everything else. Polycarbonate is the cheapest and lightest but also the shortest-lived and worst-performing in terms of insulation and noise. Glass is a significant step up in thermal performance and appearance. Solid and lightweight tiled roofs are the premium end — they transform the conservatory into a genuine habitable room but require the most structural consideration and highest budget.

2. Conservatory Size and Shape
Most installers price conservatory roof replacements by the square metre. A small lean-to conservatory of 8–12 m² costs meaningfully less than a large Victorian or Edwardian conservatory of 25–35 m². Shape also matters — a simple lean-to or square Edwardian is straightforward to re-roof. A Victorian five-facet, a T-shape, or a P-shape conservatory has more angles, more lead work and more complex installation, adding 10–20% to the base cost.

3. Frame Condition
The condition of your existing UPVC, aluminium or timber frame is one of the most overlooked cost factors. A sound frame in good condition allows a straightforward roof replacement at standard rates. A frame that needs partial repair adds £300–£800 to the job. A frame that needs full replacement — common on conservatories over 15 years old — can add £2,000–£5,000 or more. Always insist on a frame assessment before agreeing a price, and be cautious of any installer who quotes for the roof without inspecting the frame.

4. Structural Requirements for Solid Roofs
Converting a polycarbonate or glass conservatory to a solid tiled roof is not always straightforward. The original conservatory frame and base may have been built to support only a lightweight roof. A solid tiled roof is significantly heavier and may require structural reinforcement of the frame, the dwarf wall, or the foundations before installation can begin. A reputable installer will carry out or commission a structural assessment before quoting. This is not optional — it is a Building Regulations requirement on most solid roof conversions.

5. Insulation and Finishing
A solid or lightweight tiled roof replacement includes the external roof covering but the internal finish — insulation, plasterboard ceiling, lighting, decoration — is usually quoted separately. Many homeowners are surprised to find their new solid roof leaves them with an unfinished internal space that needs further investment. Always ask your installer to clarify exactly what is and is not included, and get a clear picture of the total cost including internal finishes before committing.

6. Your Location in the UK
Labour rates for conservatory roof replacement vary by up to 35% across the UK. London and the South East attract the highest rates. Wales, Northern Ireland and the North East of England offer the most competitive pricing for the same scope of work.

Conservatory Roof Replacement Cost by Size (2026)

Glass vs Solid Tiled vs Polycarbonate — Which Is Right for You?

This is the question every homeowner asks before starting a conservatory roof replacement project. The right answer depends on your budget, how you want to use the space, and what your planning situation allows.

Polycarbonate is the entry-level choice. Modern twin or triple-wall polycarbonate is a significant improvement over the single-skin material used in many 1990s and early 2000s conservatories. It is lightweight, quick to install and the most affordable option. However it remains noisier in rain, less thermally efficient than glass or solid alternatives, and has a relatively short lifespan of 15–20 years before discolouration and degradation begins. Best suited for utility conservatories, garden rooms used seasonally, or where budget is the primary constraint.

Glass roof panels are the most popular mid-range upgrade. Self-cleaning, solar-controlled glass has transformed the conservatory market — modern glass significantly reduces heat gain in summer and retains heat in winter compared to polycarbonate. The appearance is cleaner and more architectural, and the light quality inside is dramatically better than any opaque alternative. For homeowners who want to keep the feel of a glass conservatory but address the thermal comfort issues, a glass roof replacement is usually the right answer.

Solid and lightweight tiled roofs are the premium conversion that turns a conservatory into a genuine year-round room. The difference in thermal performance between a polycarbonate roof and a properly insulated solid tiled roof is enormous — a room that was unusable for four months of the year becomes a comfortable living space in every season.

Lightweight tiled systems using composite or thin concrete tiles achieve the solid tiled appearance without the full structural load of a traditional tiled roof, making them suitable for a wider range of existing conservatory frames. Full solid tiled roofs using standard roof tiles give the most thermally efficient result but require structural assessment and often frame reinforcement.

Cosy Panels and similar insulated panel systems sit between glass and solid tiled in both cost and performance. They replace the existing polycarbonate or glass panels with insulated composite panels that dramatically reduce heat loss and noise. They are generally faster to install than a full tiled conversion and do not require the same level of structural assessment. A practical middle-ground option for homeowners who want improved thermal performance at a lower cost than a full solid roof.

We built Roof Replacement Cost Calculator UK because we were frustrated by the same problem that frustrates millions of UK homeowners every year — the near-impossibility of getting a straight answer on what a new roof actually costs before inviting someone to come and look at it.Most roofing websites tell you to "get in touch for a quote." Most quote comparison platforms take your phone number and sell it to three contractors who call you back before you have even had breakfast.

And most cost guide articles give you a range so wide — "£3,000 to £25,000" — that it tells you nothing useful about your actual situation.We built something different. A genuinely useful, instant, transparent roofing cost calculator that gives UK homeowners real price estimates based on their specific roof size, material choice, property type, complexity, and the region of the UK they live in — before they speak to anyone.

Do You Need Planning Permission to Replace a Conservatory Roof?

This is one of the most searched questions in the conservatory market and the answer is more nuanced than most installers admit.

For like-for-like replacements — polycarbonate for polycarbonate or glass for glass — planning permission is generally not required under Permitted Development rights in England and Wales.

For solid roof conversions the position is less straightforward. A solid tiled roof fundamentally changes the character of the conservatory from a transparent glazed structure to an opaque roofed extension. Planning authorities in some areas treat this as a material change requiring consent, particularly if the conservatory is attached to a listed building, sits in a conservation area, or if the conversion effectively creates a full house extension rather than a conservatory.

Building Regulations approval is required for most solid roof conversions. The thermal performance, structural loading, and in some cases fire resistance of the new roof must meet current Building Regulations standards. Your installer should handle the Building Regulations application as part of the job — always confirm this is included before signing a contract.

The practical advice is to check with your local planning authority before committing to a solid roof conversion if your property is listed or in a conservation area. For standard residential properties outside these designations, most solid roof conversions proceed without planning permission under Permitted Development, but Building Regulations notification is still legally required.

Additional Costs to Budget For

Frequently Asked Questions

How much does it cost to replace a conservatory roof in the UK in 2026?
Costs range from £1,500–£3,500 for a polycarbonate replacement on a small conservatory up to £8,000–£22,000 for a solid tiled roof conversion on a large conservatory. The average UK homeowner replacing a 15–20 m² conservatory roof with glass panels spends £4,000–£9,000. A solid tiled conversion on the same conservatory costs £9,000–£18,000 including internal finishes.

Is it worth replacing a conservatory roof? 
Yes in most cases — particularly if you are replacing polycarbonate with glass or a solid tiled system. The improvement in thermal comfort, usability, noise levels and property value typically far outweighs the cost. A conservatory that was unusable for half the year becomes a year-round room that adds genuine living space to your home. Estate agents consistently note that a quality conservatory conversion adds more to a property's value than the cost of the work in most UK markets.

Can I replace polycarbonate with a solid tiled roof? 
Yes in most cases, but it requires a structural assessment first. The existing frame and base must be capable of supporting the additional weight of a solid tiled roof. Many conservatories built before 2005 were not designed for solid roof loads and will need frame reinforcement or replacement before conversion. A reputable installer will always assess structural suitability before quoting for a solid roof conversion.

Do I need planning permission to change my conservatory roof? 
For like-for-like replacements generally no. For solid roof conversions on standard residential properties outside conservation areas, Permitted Development rights usually apply but Building Regulations approval is legally required. Always check with your local planning authority if your property is listed, in a conservation area, or if you are unsure.

How long does a conservatory roof replacement take? 
A polycarbonate or glass roof replacement typically takes 1–2 days. A solid or lightweight tiled roof conversion takes 3–5 days for the external work plus additional time for internal plastering and finishing. Allow 1–2 weeks total from start to full completion on a solid roof project.