Roof Replacement: Planning & Building Regulations

Start with the planning question

Planning Portal explains that alterations to a house roof can fall within permitted development, subject to limits and conditions. Restrictions and different property types can change that position; the guidance is not a blanket permission for every roof project. ^[1]

Describe the proposed change precisely: replacing a covering without changing the shape is not the same proposal as raising the ridge, adding a dormer or changing a roof into a terrace. Avoid asking the council a broad question about roof repairs when the quotation actually includes alterations.

Then check building regulations separately

Planning Portal's existing-roof guidance says a building-control application will not normally be needed where the work affects less than 25% of the total building envelope and less than 50% of the roof. It also identifies structural alterations and certain changes to covering weight or fire performance as reasons approval may be required. ^[2]

Those are not instructions to divide a project into smaller stages to avoid oversight. Ask building control how the work and affected areas are assessed, including any associated insulation requirements. The building envelope is broader than the roof alone.

A quotation should identify who is checking these requirements and what completion documentation is expected. Do not assume that describing the job as maintenance decides its regulatory status.

Check the property type and local restrictions

Establish whether the property is a house, a flat, a listed building or subject to a conservation designation or Article 4 direction. Check the exact address, not only a neighbourhood name. Restrictions can differ within a short distance.

For local information, start with the council named on the relevant Roofcare service-area page. We link to council guidance for Surbiton and Kingston, Hammersmith and Fulham, Twickenham and Teddington, and Vauxhall. These links are starting points for checking your property, not confirmation that consent has been granted.

For an older building, the choice of repair and retention of historic material deserves specific consideration. Historic England's roof guidance explains that context. ^[3]

Make the checks part of the written scope

Before work starts, ask who will prepare information for any application, who will submit it and who pays the associated charges. Record any approvals or conditions that affect the work and the point at which they must be resolved.

Also establish the process for an unexpected finding. For example, discovery of a structural defect can change the work needed. The sensible response is to stop and agree the next step, not quietly extend the scope without checking whether the earlier assumptions remain valid.

Planning is not the only permission to consider

If you are not the sole freeholder, establish who has authority to approve the work. Access over another property, shared structures and building-management arrangements can require separate agreement. Those practical permissions should not be confused with a council decision.

Tell the contractor about any constraints you know about, but do not attempt to settle specialist legal questions from a generic roofing article. Obtain the appropriate advice for the building and the proposed work.

Questions to settle before accepting a roof quotation

1. What exact work and change of materials are proposed?
2. What property-specific planning checks have been made?
3. Does building control need to be involved, and who is responsible?
4. What insulation, structural or other design advice is required?
5. Which approvals and completion documents will I receive?

Roofcare London can discuss repairs and replacements with you, but a website article cannot determine approval for an unseen project. Use the form below to describe the roof, address and proposed work. This is general guidance for England, checked on 15 October 2026, not a property-specific legal determination.