House Extensions
in Newcastle & the North East

It depends on the size, type and location of the extension. Many single storey rear extensions in Newcastle and the North East fall under Permitted Development rights, meaning no formal planning application is needed. A single storey rear extension can extend up to four metres beyond the rear wall of a detached house or three metres for any other type of house without planning permission, provided all other permitted development criteria are met. Planning permission is required if the extension exceeds these limits, if the property is listed, or if it sits within a conservation area. Side extensions and wraparound extensions are more likely to require planning permission than straightforward rear extensions. We will advise on whether planning permission is needed as part of your free site visit.

The timescale for a single storey house extension in Newcastle and the North East depends on the size and complexity of the project. A straightforward single storey rear extension typically takes between 8 and 14 weeks from groundworks to final handover. This includes time for the structure to be built, made watertight, first fixed, plastered and fully fitted out. Projects requiring planning permission will add time before work can begin on site. We produce a full programme before work starts so you know exactly what to expect at every stage.

The cost of a single storey house extension in Newcastle and the North East varies depending on the size of the extension, the specification of materials and finishes chosen and whether any additional work is required such as relocating plumbing or installing bi-fold doors. As a general guide, a single storey rear extension typically starts from around £25,000 to £40,000 fully completed including all trades, building regulations and VAT. Larger or more complex extensions with high specification finishes will cost more. We provide a fully itemised fixed price quote covering every trade before any work is agreed. Please verify these price ranges with the client before publishing.

Yes, in most cases a well designed and properly built house extension adds meaningful value to a North East property. Adding usable floor space is one of the key factors that influences property value and a single storey extension that creates a larger kitchen, open plan living space or additional bedroom is particularly valued by buyers. The amount of value added depends on the location, the quality of the build and the current property market. An extension that has full planning and building regulations sign-off will always perform better in terms of added value than one that does not have the correct approvals in place.

Under Permitted Development rights, a single storey rear extension can extend up to four metres beyond the rear wall of a detached house or three metres for any other type of house without requiring formal planning permission. Under the Neighbour Consultation Scheme, these limits can be increased to eight metres for detached houses and six metres for other houses, subject to notifying the council and neighbouring properties before work begins. These limits do not apply to listed buildings, properties in conservation areas or where permitted development rights have been restricted through an Article 4 Direction. We will confirm what applies to your property as part of your free site visit.