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Outbuildings and conservatories

Is a conservatory with a polycarbonate roof a room of the house because the survey found a sofa?

No. The survey should say whether the roof is polycarbonate sheet or glass, and what condition that roof and the junction are in, because the materials are not the same. Neither finding turns the conservatory into a room of the house, and the survey does not apply the building regulations to reclassify it.

Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.

What is the fuller explanation?

Polycarbonate can be scratched, crazed or noisy, and glass can be cracked or misted at a sealed unit. The useful survey sentences are the material, the leaks, the bars and the flashing against the wall. A sofa, a heater and a rug are how the room is used. GOV.UK’s building-regulations approval is a paper process. The inspection does not complete it, and it does not decide that the space is habitable.

Ask your solicitor if you need to know how the addition was approved. Ask the survey whether water comes in at the house wall. Do not let a furniture layout settle either question. A home survey does not test the heater and does not design a replacement roof. If the sheet has failed, describe that failure. If it has not, do not invent a room the house did not have.

What should you ask your surveyor?

  • Is the roof polycarbonate or glass, and what is wrong with it if anything?
  • What did you see where it meets the house wall?
  • Are you calling the conservatory a habitable room of the house?

What are the typical next steps?

  1. Use the survey for the roof material and the junction.
  2. Use the solicitor for any approval question. Do not use the sofa.
  3. Do not replace the sheet and tell yourself the survey reclassified the room.

Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.

Also asked about this

Does a glass roof make it part of the house?

No. Glass is a material. Being part of the house, in planning or building-regulations terms, is not decided by the survey.

Is crazing a leak?

Not by itself. Crazing is a surface. A leak is water getting in. The report should say which it saw.

Sources