A single storey side extension can qualify for Permitted Development in Teesside, but the rules are stricter than for rear extensions. The key requirements are: the extension must be single storey; it must not exceed half the width of the original house; it must not project in front of the principal elevation or a side elevation that faces a highway. Properties in conservation areas — which include several streets in Middlesbrough and Stockton — cannot use Permitted Development for side extensions and always require full planning permission. We check your property’s status during the free consultation.

The statutory decision period for a householder planning application is 8 weeks from a validated submission. Middlesbrough Council, Stockton Borough Council, Redcar council, Hambleton council / North Yorkshire Council typically determine straightforward single storey side extension applications within 6–8 weeks of submission. From your first call to us, to receiving your planning drawings takes approximately 2–3 weeks (including survey and drafting). Adding the 8-week decision period, most clients have their planning permission within 10–12 weeks of contacting us.

If your side extension involves work on or near a shared (party) wall with your neighbour — which is common for semi-detached houses or terraces — you may need to serve a Party Wall Notice under the Party Wall Act 1996. This is a separate legal requirement to planning permission and building regulations. Your builder can advise on this, or you can instruct a Party Wall Surveyor if required. Party wall matters are separate from our drawing service, but we’re happy to advise on whether your project is likely to trigger the Act during your free consultation.

A side return extension fills in the narrow alleyway that runs alongside the rear portion of many Victorian and Edwardian terraced and semi-detached houses. These alleyways are often just 1–2 metres wide and are rarely used productively. Infilling the side return creates a wider ground floor — most commonly used to extend the kitchen into a larger open-plan space. Because side returns are typically narrow relative to the house width, they almost always fall within the Permitted Development half-width limit. Side return extensions are one of the most cost-effective improvements available to homeowners with this property type.

Planning drawings are submitted to the council to obtain planning permission — they show what you propose to build and how it will look, but don’t include structural or technical construction details. Building regulation drawings (also called building control drawings) are a separate set of more detailed technical drawings used to gain Building Regulations approval, which is required before your builder starts work. Building regulation drawings include structural specifications, insulation details, and construction methods. We can provide both — ask us for a combined quote.

A Lawful Development Certificate (LDC) is not legally required if your extension is within Permitted Development limits — you can build without one. However, an LDC is strongly recommended. It provides a formal record that your extension was lawful, which protects you when selling your home (solicitors and buyers routinely request LDCs) and means you can’t be challenged about the extension’s legality in the future. We can advise on whether an LDC is worth obtaining for your specific project.

Yes — but you will need to submit a full planning application regardless of size. Permitted Development rights for side extensions do not apply on designated land, which includes conservation areas. Middlesbrough has several conservation areas where this applies, including parts of Linthorpe and Marton. The planning application process is straightforward, and many side extensions in conservation areas are approved — but the design needs to be sympathetic to the character of the area. We prepare drawings specifically for conservation area applications and can advise on materials and design features that improve approval chances.