Side Extensions

A side extension can also be called a kitchen extension, or alternatively, can add utility space to the ground floor. As the heart of any home, adding space here, whether your family is expanding or you’re seeking to add value to your home, is beneficial.

A side extension is a smart, practical way to increase home size without sacrificing garden space. This type of extension can completely transform how your property works for you.

This type of extension is especially popular with:

  • Semi-detached homes
  • Detached properties
  • Victorian and Edwardian houses with side access

At Simply Easy Refurbs, we specialise in home extensions of all kinds. We design and build side extensions across London, helping homeowners create practical, beautiful spaces. The first step is requesting your free quote, followed by checking out our recent projects, and our excellent rating on TrustPilot.

Why choose us?

Bespoke designs & planning

Unique to your home.

Price match

Found a cheaper price? We'll match it.

Insurance-backed guarantee

Giving you peace of mind.

Fixed price

Ensuring there are no surprises!

Full project management

Through to completion.

House Extension Types

Many London homes have unused space at the side of the property that offers huge potential. It’s helpful to have somewhere to keep the wheelie bins, but that square footage could be working much harder for you. A side extension allows you to increase your floor space and improve the overall layout of your home.

Our Side Extension Services

We provide a fully managed design-and-build service, supporting your project from start to finish. We work closely with homeowners throughout the process to ensure every extension is tailored to your property, lifestyle, and budget. Our free quotes are always transparent, detailing what budget goes where.

A Rear Extension

A side extension is built along the side of your property. It typically sits alongside the rear "outrigger" kitchen without sacrificing garden space.

Our initial visit and quotes are free, so if you have a space you’d like to see transformed, simply contact us.

Get a free, no-obligation quote

Trusted by homeowners across the UK

Lindsey Woodward profile picture
Lindsey Woodward
2 months ago
Fantastic attic conversion with SimplyEasy. Our project manager Ben was amazing throughout the whole process. We were kept informed on every detail at every stage. The work was carried out really fast and finished on time. Highly recommend for any work you need on your home!!!
Logan Max profile picture
Logan Max
3 months ago
SimplyEasy Refurbs provided a fantastic bespoke design for our project – they really listened to what we wanted, came up with clever, space‑saving ideas, and delivered a finished result that feels perfectly tailored to our home
Kevin Lieng profile picture
Kevin Lieng
5 months ago
We recently had our loft converted and are absolutely delighted with the result. From the very first meeting with Seb, who took the time to explain all the options and answer our questions, we felt confident we had chosen the right company. He was knowledgeable, professional, and never made us feel pressured at any stage.
Throughout the project, Marius was our project manager. He kept everything running smoothly, communicated clearly, and ensured the work was completed to a very high standard. Marius’s team was very good, hardworking, and clearly took pride in their work, which really showed in the final finish.
The workmanship throughout was outstanding, and the finished loft has completely transformed our home. The attention to detail, quality of finish, and professionalism shown throughout the project exceeded our expectations.
A big thank you to Seb, Marius, and the entire team for delivering such a fantastic loft conversion. We would highly recommend this company to anyone looking to add valuable space and improve their home
Robert Baylay-Bell profile picture
Robert Baylay-Bell
5 months ago
I initially came across Simply Easy Refurbs (SER) online and followed their work for some time before my project reached the right stage. When I was ready to proceed, they were one of three companies I invited to quote.

From the outset, SER stood out for their efficiency, professionalism and clear understanding of the brief. As part of my due diligence, I spoke with three of their previous clients, all of whom gave strong, consistent feedback. This gave me the confidence to appoint them for a full refurbishment, including a loft conversion and rear extension.

Throughout the project, SER maintained a high standard of professionalism. Communication was consistent, with regular check-ins to ensure everything remained on track and aligned with expectations.

I would not hesitate to recommend Simply Easy Refurbs to anyone considering a full home refurbishment.
Katrina Gimbrere profile picture
Katrina Gimbrere
6 months ago
We used Simple Easy Refurbs to do our loft conversion and are very happy with the service. They used highly skilled builders and helped us resolve any issues that did crop up. They communicated well and I would recommend them to anyone looking to convert their loft.
Vanessa Pinnock profile picture
Vanessa Pinnock
7 months ago
Brilliant execution
We had a very good experience with Simply Easy Refurbs, the communication was always on point whether email, what's app or telephone. The dedicated what's app group is a great platform to check on the progress, share ideas visually etc. We had a good working relationship with all the team but especially with Tomas, our design was executed to a very high standard. All the works carried out was highly professional, done to a high standard and good quality materials were used. All the tradesmen involved worked exceptionally hard sometimes staying later than expected just to get the job done!
We're very happy with the end result. We have a future proof, modern design and the loft conversion has created so much space! We would highly recommend this firm for renovation projects! Thanks again to Seb, Tomas and the team.
Nick Hodgson profile picture
Nick Hodgson
1 year ago
We had a great experience with Sebastian and his team. Our mansard loft conversion has added a whole new floor to our flat and provided an amazing new bedroom for our daughter. Our builder Loren and his team were excellent - the work was done on time and to cost; any issues were swiftly dealt with. As expected, we had to get a fire sprinkler system installed - with hindsight we could have started shopping around for a company to do it before building control confirmed it would be necessary; but we were lucky - we found a company who could do it quickly and that meant there was no delay to our project. The aftercare has been fabulous - only today their electrician came back to move a fan in the new bathroom ceiling that was in the way of our new cupboard doors. We couldn’t have asked for more from SimplyEasy Refurbs: we’d recommend them 100%.
Valerie Bourdieu profile picture
Valerie Bourdieu
1 year ago
I had a very specific idea for my loft and the team made it happen. Great advice, great quality work. I had so many positive comments from friends and relatives. Also, I recently put my house on the market and viewers loved the loft, I have no doubt that the loft helped my house sell faster. Plus, you pay for what you signed for, no hidden fees, furthermore timing was again to what was agreed! I would have no hesitation to recommend SimplyEasy Refurbs!
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Recent Extension Projects

View All Projects

Kitchen Extension In Battersea

A recently completed kitchen extension in Battersea in South London. The homeowners wanted something that felt very spacious and bright, with high end details. We think the kitchen island is a particularly nice detail.

Kitchen Extension In Leytonstone

A newly completed kitchen extension in Leytonstone created a wonderfully warm and bright space for the family to enjoy. Rear extensions are ideal for terraced houses, and the homeowners wanted to maximise the square footage by opting to not have a utility room or downstairs WC.

Kitchen Extension In Streatham

This recently completed kitchen extension in Streatham created a huge amount of space and natural light for the homeowners, including a super practical utility space and WC. The family were certainly happy for the extra storage space too.

Kitchen Extension In Brockley

This kitchen extension in Brockley is a top tier example of how good the heart of the home can look. Creating space for the kitchen utilising pathway space outside, this home extension was finished to our usual high standard and the family were thrilled.

Kitchen Extension In Battersea

A kitchen extension in Battersea, but one with a difference. The family wanted a stylish space for resting and entertaining, and we certainly delivered with a kitchen extension that looks aesthetically more like a music studio or a designer hotel interior.

Kitchen Extension In Balham

We recently completed this stylish and bright kitchen extension in Balham. With 4 skylights and full size garden doors, there is a strong sense of indoor outdoor living. The homeowners opted against having a utility room, instead choosing to have a cosy home office.

View All Projects


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FAQ Section

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Side Extensions

What is a side extension?

A side extension adds living space to the side of your house, often making use of an unused side passage or wider plot. It can provide room for a larger kitchen, utility room, home office or additional living area, depending on your property’s layout.

How much does a side extension cost?

The cost of a side extension depends on its size, design, foundations and structural requirements. Glazing, plumbing, electrics and interior finishes will also influence the budget. Contact SimplyEasy Refurbs to discuss your plans and request a quote tailored to your project.

Do I need planning permission for a side extension?

Some single-storey side extensions might qualify under permitted development, subject to conditions covering width, height, location and other restrictions. Two-storey side extensions require planning permission. Check your proposal with your local planning authority before starting work.

Can a side extension make my kitchen bigger?

Yes. A side kitchen extension can create extra width for cabinets, worktops, a dining area or a kitchen island, where space allows. Rooflights and carefully positioned windows can introduce daylight, while a thoughtful layout can improve storage and access to the garden.

How do I get started with a side extension from SimplyEasy Refurbs?

Consider how you want to use the extra space and establish an approximate budget. Share photographs, measurements or existing drawings with SimplyEasy Refurbs to discuss your ideas. Request a detailed quote outlining the proposed work, specifications, and costs before moving forward.

How long does it take to build a side extension?

The build time depends on the extension’s size, complexity and level of interior finishing. Structural alterations, drainage changes and site access can affect the schedule. Allow additional time for design and any necessary approvals, and request a project-specific construction programme before work begins.

What is the difference between a side extension and a side return extension?

A side extension adds space alongside your house. A side return extension is a particular type that fills the narrow passage beside an existing rear section, often found in terraced or semi-detached homes. It can widen a kitchen and improve the ground-floor layout.

Enhance Your Home with a Side Extension

To learn more about the benefits of a side extension or to discuss your property in more detail, talk to our experienced SimplyEasy Refurbs team today.

We’re a member of the Federation of Master Builders, and offer free quotes and price matching on all projects.

Read our reviews on Trustpilot