Side and Rear Extensions

Plus Rooms are leading specialists in designing and building open-plan kitchen extensions. We are renowned for offering a high level of skill, expert project management and unrivalled customer service.

Need extra space for all the family to enjoy? How about a stylish living space that’s perfect for parties and family gatherings? We can build a luxury side and rear kitchen extension to suit any need, and we’ll manage the entire project step-by-step.

What is a Side & Rear Extension?

A side and rear extension is an innovative way for homeowners to expand their kitchen into that narrow strip of space between two houses, which is often used for storage or as a small pathway, whilst also extending out into their rear garden space. This extension is great for repurposing underused space to accommodate a larger kitchen and living space or even a conservatory.

With years of experience creating kitchen extensions, customers can choose from a diverse range of design options. Our customers want an extended space that’s truly original, something that exemplifies their personal style whilst catering to their practical needs.

Once we understand our customer’s needs, they inform every decision we make. Want to bring in more natural light? We can incorporate bi-fold doors, or perhaps floor to ceiling windows. Passionate about those final personal touches? Us too – we think they’re crucial to building an amazing space. From light fittings to floor finishes, your extension will be built with the closest possible attention to detail.

We also offer customers to have loft conversions incorporated into their design. By transforming your bathroom or building an additional bedroom, this can be a valuable investment in your property.

How Much Does a Side and Rear Extension Cost?

The cost of a house extension can vary, particularly in London. There is no set cost for a side and rear extension, as the final estimate can depend on the property size, extension type and roof type.

For instance, a Plus Rooms medium side and rear extension with a pitched and flat roof has an estimated cost of £85,000.

If you have a budget in mind, our extension cost calculator shows the average cost for all the different types of extensions Plus Rooms has to offer. The cost for each type of extension is accompanied by a 3D model, so you can begin to build a picture of your ideal extension.

All of our estimated costs for our extensions include construction costs, plumbing and electricity, glazing and external doors and applicable VAT.

Planning Permission and Permitted Development

As experts in construction project management, we know everything there is to know about planning permission and permitted development rights. This means our clients don’t have the hassle of planning applications, party wall agreements or building regulations approval. Visit our dedicated planning services page to find out more.

Interested in a premium extension from Plus Rooms? Below is a selection of recent side and rear projects we’ve delivered for homes across London.

To find out more, contact the Plus Rooms team today to request a free consultation.

See more house extension ideas here.

Find out more about our other home extension types: side extensionsside return extensions, wraparound extensionsflat roof extensions, and rear extensions

Our side and rear kitchen extension projects

Albert Rd

Muswell Hill

Topsfield Rd

Crouch End

Rosemont Rd


Woodbastwick Rd 1


Holmewood Rd

Tulse Hill

Pentney Rd


Murray Rd


Garfield Rd


Nigel Rd

Rye Lane

Friern Road 2

East Dulwich

Interested in Kitchen Extensions?

View our wide portfolio of Kitchen projects