Conservatory Roof Replacement Cost UK: Prices & Quotes

Trade Conservatories Direct advertises a white replacement glass roof measuring 2,954 mm wide by 2,237 mm projection at £1,099 including VAT, and a 2,954 mm by 3,723 mm example at £1,599 including VAT. Its stated specification is a K2 PVC roof with Active Blue Low E glass or equivalent; dimensions are internal frame sizes based on 70 mm frames. Standard UK delivery is included subject to terms.

The page offers fitting services separately but does not expressly include installation in those advertised product figures. Confirm the current price, exact specification, delivery conditions and labour in writing. Do not compare either example directly with a survey-based supply-and-fit quote or treat the two prices as a UK installed-cost range.

Choose the result you want before choosing a system. A glass replacement retains roof glazing, while a solid roof changes the roof construction and internal appearance. An insulated ceiling beneath an existing roof is another scope of work: ask whether the original roof remains and what is being repaired or replaced.

Request the exact product name and specification for each option. For glazing, ask about the quoted glass, roof ventilation and maintenance. For a solid system, ask about insulation, ceiling finish, rooflights and the evidence supporting its suitability for your conservatory. Avoid accepting a broad label such as warm roof without a component list.

Think about the adjoining house as well as the conservatory. Ask the provider how the proposal changes daylight, headroom and access for cleaning or maintenance. If your priority is a leak repair, obtain a diagnosis before assuming that a complete system replacement is the only sensible option.

LABC's householder reroofing guide says replacing a translucent conservatory roof with a solid roof requires a building-regulations application and highlights the need to assess loading. It also warns about simply wrapping material over and under an existing roof without evidence that the structure can carry the added load.

Treat that guidance as a reason to have the proposed system and supporting structure assessed before accepting a price. Ask who checks the existing frames, connections, base and foundations, and how the new roof loads are supported. Obtain the findings and any required remedial work in writing rather than relying on the word lightweight.

Clarify who pays for investigation and what happens if the existing conservatory is unsuitable. A quote should identify any frame replacement, strengthening or other works needed for the design. Confirm the current requirements and inspection route with the building-control body for your location.

Planning Portal's England guidance describes conditions for an exempt conservatory, including ground-level construction under 30 m², separation from the house by external-quality walls, doors or windows, and independently controlled heating. Glazing and fixed electrical work still need to meet the applicable requirements.

Do not assume that the original conservatory's exemption automatically covers a new roof or other alterations. The same guidance says a new structural opening between the conservatory and house requires building-regulations approval even where the conservatory is exempt. Show any proposed opening or door removal to the person assessing the work.

Agree who prepares the application, arranges inspections and supplies the completion documents. Planning permission and building regulations are separate questions: ask the local planning authority whether your roof design or property restrictions need consent. Use the relevant national guidance outside England.

Ask whether the price includes removing and disposing of the old roof, protecting the occupied house and making the work area usable afterwards. Confirm access arrangements and who is responsible for temporary weather protection during the changeover. These are practical parts of the job that a product price alone does not describe.

Specify the roof junction with the house, trims, guttering and downpipe work. Ask which existing parts are retained, which are renewed and what happens if damage is found after removal. Request a clear allowance or exclusion for unresolved work, with an agreed process for approving any change.

For a solid roof, record whether insulation, plasterboard, plastering and decoration are included. If lights, sockets or roof windows are part of the plan, include their supply, installation and relevant paperwork. Distinguish a finished ceiling from a roof shell so that the two proposals describe the same completed room.

Give each provider the same measured brief, photographs and intended use. Record the existing roof type, conservatory dimensions, shape and any known leaks or movement. Ask which measurements and structural details need a site survey before a fixed price can be offered.

Compare the exact roof system and specification alongside the total. Separate VAT, delivery, removal, installation, internal finish, structural work and approval costs where useful. List provisional allowances and exclusions rather than silently assuming they are included. Obtain a final written scope after the survey.

Check payment stages, the proposed programme and how changes are priced. Ask which warranty covers the roof product and which covers installation, including any exclusions and maintenance conditions. Keep the specification, survey findings and completion documents together for future repairs or a property sale.

Illustrative arithmetic only: suppose a provider quotes £4,800 for the supplied and fitted roof, £450 for disposal, £700 for ceiling finishing and £250 for approval-related costs. If all four amounts already include any applicable VAT and none overlap, the listed total is £6,200. These invented amounts explain the comparison and are not market prices.

A second quote of £5,900 is not automatically cheaper if it excludes disposal or leaves the ceiling unfinished. Add written prices for missing work before comparing. Conversely, do not add a separate removal charge when the main package already includes it. Unresolved structural work should remain visible as an unpriced item.

Use one complete roof project as the quantity in the calculator below. Enter the main quoted package and separately priced extras once, using amounts that consistently include any applicable VAT. Do not multiply a whole-roof quotation by the floor area.

The calculator performs arithmetic using your figures; it does not assess your structure or generate a market estimate. Keep unpriced investigations and remedial work outside the confirmed total until quoted. Discuss a suitable contingency for your project separately and agree how additional work will be authorised.