Roof Replacement in Crewe

Planning & Building Regulations for a New Roof in Crewe

The planning question is simpler than it is usually made to sound. Section 55 of the Town and Country Planning Act 1990 says work that does not materially affect a building's external appearance is not development. Slate replaced with slate, or tile with matching tile, does not change the appearance — so there is nothing to apply for.

A change of covering is the exception. If the new roof would look materially different from the old one, the section 55 exemption stops applying and permission may be needed. That is a five-minute conversation with Cheshire East Council and it is considerably cheaper before the order goes in.

One thing does genuinely change the position, and it is not conservation area status on its own. Designation does not by itself remove roof alteration rights — what removes them is a specific Article 4 direction. Crewe is not covered by any of Cheshire East's Article 4 directions, which apply to eight conservation areas elsewhere in the borough. Which means the ordinary position applies to most Crewe properties.

Listed status changes everything. Re-roofing a listed building affects its character, so listed building consent is required under section 7 of the Planning (Listed Buildings and Conservation Areas) Act 1990 — in addition to, not instead of, anything else. Cheshire East Council deals with it, and it is worth starting early because it is not a formality.

The regulation that actually bites on a re-roof is not a planning one. It is regulation 23 of the Building Regulations 2010, which requires a renewed thermal element to be brought up to current insulation standards. Replacing the whole covering renews the whole element, so there is no argument about whether it applies.

Approved Document L Volume 1 puts the figure at 0.16 W/(m²K) for a renovated roof on an existing home. It is worth seeing that number on paper, because it is the difference between a re-cover and a compliant re-roof.

Both of the escape routes in the guidance are worth knowing. Head room is one: if the full thickness would lose you the room, a lesser standard applies provided the insulation fills the rafter depth. Payback is the other: an upgrade that will not repay itself inside fifteen years is reduced to one that will. Neither permits leaving the roof less insulated than before.

There are two ways the work gets signed off. Either it is notified to building control — the local authority or a Registered Building Control Approver — or the roofer is registered with a competent person scheme (CompetentRoofer, run by the National Federation of Roofing Contractors, or NAPIT) and self-certifies. Both are legitimate. What matters is that one of them happens, because the certificate is what a buyer's solicitor asks for years later.

Older and protected buildings get some latitude. Approved Document L accepts that listed buildings, buildings in conservation areas and scheduled monuments need not comply fully where doing so would unacceptably alter character or appearance — though that is not a blanket exemption, and compliance is still expected where it would not. It also warns against upgrades that trap moisture in vapour-permeable construction, which matters on older stone and lime-mortared property. Cheshire East Council's conservation officer and building control settle it between them.