House Extensions in Brighton

There isn’t a reliable one-price-fits-all figure because every extension is different. The final cost will depend on the size, design, access, structural work, materials, and level of finish involved. Single-storey extensions and larger double-storey extensions can have very different requirements, particularly when kitchens, bathrooms, or structural alterations form part of the project.

Our team can visit your property in Brighton, Hove, Shoreham-by-Sea, or the surrounding areas, discuss what you want to achieve, and provide a detailed quotation based on your plans.

Not necessarily. Many rear extensions and single-storey side-return extensions can be built under permitted development rights when they meet the relevant limits and conditions. A single-storey side extension may qualify if it is no higher than 4 metres and no wider than half the width of the original house. Side extensions of more than one storey require planning permission.

The requirements vary depending on your property, its location, and any previous building work. Flats, maisonettes, listed buildings, homes in conservation areas, and properties affected by an Article 4 Direction may be subject to different or additional restrictions.

We can discuss the proposed work with you and help you identify the checks needed before construction begins.

Under standard permitted development rules, single-storey rear extensions can project up to 3 metres from the original rear wall of an attached house or up to 4 metres for a detached house. Larger rear extensions of up to 6 metres for an attached house and 8 metres for a detached house may be possible through the prior approval process.

These allowances are subject to further limits involving height, boundaries, land coverage, and previous additions. Our team can look at the practical possibilities for your property in Brighton, Hove, or Shoreham-by-Sea, but the local planning authority should provide formal confirmation of its planning status.

Yes, a house extension will normally require Building Regulations approval, even if it does not need planning permission. The regulations cover essential parts of the build, including foundations, structural stability, insulation, drainage, ventilation, electrical work, and fire safety.

As a full-service building company, we coordinate construction and the relevant trades throughout the project. This gives you one experienced team managing the extension while the required inspections and building-control checks take place.

Not every extension requires a Party Wall Agreement. The Party Wall etc. Act 1996 may apply if the work affects a shared wall or structure, takes place on or close to a shared boundary, or involves excavation near a neighbouring property. This can be relevant to rear extensions and side-return extensions, but the position and depth of the work determine if the Act applies.

If party wall requirements may affect your plans, we can raise the issue early so you have time to obtain advice from a qualified party wall surveyor before work begins.

Timescales vary considerably from one project to another. Straightforward single-storey extensions often take less time than wraparound or double-storey extensions, but access, ground conditions, structural alterations, weather, material availability, and internal finishes can all influence the schedule.

Once the design and scope of work are clear, The Patcham Building Company can provide an expected programme for your extension and keep you updated as the project progresses.