House Extensions in Bath

Looking to extend your home in Bath? Whether you want a larger kitchen-diner, an extra bedroom, a loft conversion, or a two-storey extension, we’re here to help turn your ideas into fully approved plans ready for construction.

We provide architectural design and planning services for all types of house extensions in Bath, from Georgian terraces in the city centre to modern homes on the outskirts. Our service includes concept design, measured surveys, planning applications, building regulations drawings, and full support from concept to approval.

With our expert guidance and local planning knowledge, we make it easier to unlock your property’s potential.

Bath’s homes are full of character, from Grade II-listed townhouses to post-war semis. Every extension project requires thoughtful design to make the most of the available space while respecting the style and proportions of the existing building.

We start every project by understanding your goals, whether that’s creating open-plan family living, a dedicated workspace, or a stylish new bathroom. We’ll explore layout options, natural light, connection to the garden, and how to add space without compromising flow or aesthetic.

Our architectural designs are bespoke, practical, and tailored to how you live. We also consider buildability, budget, and planning context right from the outset, so there are no surprises later on.

Bath has some of the most sensitive planning zones in the UK. Large parts of the city fall within a Conservation Area or the World Heritage Site boundary, which means even small changes to your property may be subject to stricter controls.

That said, some house extensions in Bath can be carried out under permitted development rights (PD), particularly rear and side extensions to non-listed houses. We assess every project on a case-by-case basis and advise whether full planning permission is needed or if the works qualify under PD.

We handle all planning applications and Lawful Development Certificate submissions on your behalf, ensuring all drawings and documents meet Bath and North East Somerset Council’s specific requirements.

Even if your extension doesn’t need planning permission, it will still need to comply with Building Regulations. These are legal requirements covering the structure, safety, energy efficiency, and performance of your extension.

Our building regulations drawings include all the technical details needed for approval and for builders to accurately price and construct the work. We also coordinate with structural engineers and, where needed, thermal consultants to ensure your project is fully compliant and ready for inspection.

We’ll prepare the submission to your chosen building control provider, whether that’s the council or a private inspector, and support you throughout the approval process.

Our clear, structured process helps you move from idea to approved plans with confidence. Here’s how it works:

1. Initial Consultation

We start with a free consultation (online or in person) to understand your goals, property, and budget. We’ll explain your options and recommend the best route forward based on your home and planning constraints.

2. Measured Survey and Concept Design

We carry out a full measured survey of your property and begin working on concept drawings. These layouts explore different options for space, layout, and form, giving you a clear picture of what’s possible.

3. Planning Submission

Once you’re happy with the design, we prepare and submit a planning application or a Lawful Development Certificate. We act as your agent, manage communications with Bath and North East Somerset Council, and make amendments where needed.

4. Building Regulations and Technical Drawings

We produce a full set of technical drawings for building regulations approval. This package is also ideal for obtaining accurate builder quotes and ensuring your build runs smoothly.

5. Tender and Ongoing Support

If needed, we can help you find a builder, compare quotes, and provide advice during the build phase. While we don’t carry out construction, we’re available to answer queries and keep the build aligned with the approved design.

Whether you live in Bear Flat, Larkhall, Combe Down, Oldfield Park, or the city centre, we’re here to help you extend your home with clarity and confidence. Our architectural services are flexible, affordable, and fully tailored to you.

No matter how far you take CK with you on your building journey, we’re happy to provide advice and expertise to make sure you have everything you need to create your perfect build.