Side return, rear and wraparound extensions for SW19 homes across Wimbledon. Free site visit, then a fixed-price quote.
Photos and write-ups of our nearby builds below
We set out the programme in writing before work starts
We check Wimbledon planning requirements
Members of the Federation of Master Builders
Perfect for terraced and semi-detached properties. Typically adds 15-20m² of space.
Extend into your garden. Creates open-plan living spaces with natural light.
Combines side and rear extensions for maximum space. Transforms ground floor living.
Several parts of Wimbledon are designated conservation areas. We navigate Merton Council's additional planning requirements, ensuring your extension satisfies both your needs and planning regulations.
Our Wimbledon and Merton planning guide covers permitted development, Article 4 areas and CIL.
Wimbledon has many Edwardian and Victorian properties. We create sympathetic extensions that respect original architecture while delivering modern, functional spaces with excellent natural light.
Many Wimbledon homes are terraced or semi-detached, so the Party Wall Act often applies. A party wall surveyor usually serves the notices for you, and if a neighbour doesn't consent, a surveyor (one agreed surveyor, or one for each side) makes an award. We flag likely requirements early, give the surveyor our construction information, and plan the start date around the notice periods.
We understand Wimbledon's streets, parking zones, and access challenges. Our experienced team coordinates all site logistics efficiently to minimise disruption to you and your neighbourhood.
We publish one typical band, for kitchen and side return extensions. Rear, wraparound and double-storey extensions are priced at the site visit.
| Type | Typical build price (ex VAT) | Notes |
|---|---|---|
| Kitchen / side return extension | £90,000–£100,000 | Typical build price; kitchen and flooring supplied by you. |
| Single-storey rear extension | Priced at site visit | Size, structure and glazing vary too much for a fair band. |
| Wraparound (side return + rear) | Priced at site visit | Usually needs a householder planning application. |
| Double-storey extension | Priced at site visit | Needs planning permission; priced once the design is known. |
Typical project build prices, excluding VAT and professional fees (design, structural engineer, Building Control, party wall and planning fees). Prices are the same across every borough we cover; access and logistics (parking, skips, scaffold, restricted access) can affect the final price. Your fixed quote follows a site visit.
Our fixed-price quote is based on the agreed written scope. Client-requested changes and unforeseen work are priced and approved separately before proceeding.
Most of Wimbledon is in Merton, but parts of Wimbledon Park and Southfields are in Wandsworth, which has different rules, so we confirm the council for your address first. Merton's permitted development page points homeowners to the national rules and highlights three things: flats and listed buildings have no householder permitted development rights, conservation areas have extra restrictions, and larger single-storey rear extensions go through prior approval.
Prior approval covers rear extensions over 3m and up to 6m for most houses, or over 4m and up to 8m for detached houses. Merton notifies neighbours, and you mustn't start until the council has said prior approval isn't required, has granted it, or 42 days have passed without a decision. Our 6m rear extension guide explains the limits and the £249 fee.
Many Wimbledon houses, from the inter-war semis towards Raynes Park to the larger houses around the Village and the Ridgeway, have room to extend on two floors. In a conservation area, permitted development doesn't cover rear extensions of more than one storey at all. Elsewhere, we plan a double-storey extension on the basis of a householder application to Merton, which costs £548 from April 2026, and price it at the site visit once the design is settled.
Two things to check early on a bigger scheme. First, the Community Infrastructure Levy: Merton says a permission for at least 100 square metres of new floor space will usually be liable, and the householder exemption (Form 9) must be claimed before development commences. Second, the John Innes Merton Park and Wilton Crescent Article 4 areas, where the council's design guide says extensions should be subordinate to the main house, generally single storey with a pitched roof.
Merton lists more than a dozen conservation areas in and around Wimbledon, including Wimbledon North, Wimbledon Village, Wimbledon West, Wimbledon Hill Road and South Park Gardens. In each one, side extensions and rear extensions of more than one storey need a householder application. The council's "Conservation Areas Article 4s" map shows which addresses are covered by the John Innes directions, and its Regulatory Services Hub lists applications validated since 1 July 2008, so you can see what has been approved on your street.
Our Wimbledon whole-house renovation combined a new rear kitchen and dining extension with a loft conversion, replacement windows and a full internal refurbishment in one programme, for a property developer preparing the house for resale.
For single-storey work, the nearest comparisons are our Earlsfield side-return extension (200 sq ft) and Wandsworth rear kitchen extension (about 350 sq ft).
Projects we have built in and around Wimbledon. Each one links to the full write-up with photos.
Wimbledon, South West London, SW19
Earlsfield, Wandsworth, SW18
13 weeks on site · 200 sq ft extension
Wandsworth, South West London, SW18
13 weeks on site · 350 sq ft extension
“We worked with Bluebird on our kitchen extension project. Highly recommend. They were transparent, easy to work with, had top tradesmen who care about delivering a good build and were always happy to create solutions as we progressed. Thanks Ben, Tom and Milen!”
Step 1
We visit, measure up and assess the existing structure, access and any party wall implications, then explain the practical next steps. No obligation.
Step 2
An itemised quote for the build, excluding VAT and professional fees (design, structural engineer, Building Control, party wall and planning fees), which are quoted separately.
Step 3
Working with your architect, the drawings are developed and submitted for planning if required, and party wall notices are served to neighbours if needed. We plan the start date around them.
Step 4
The programme is set out before work starts. If you change the scope, we price the change and agree it with you first.
Step 5
Final inspection, a snagging walk-through with you, and keys handed over.
Bluebird Spaces is a member of the Federation of Master Builders.
View our FMB profileCall us, or send the enquiry form and we'll arrange a free site visit.
Don't just take our word for it — hear from homeowners across SW London
"Ben, Tom and Milen are just brilliant. Not only were these guys and their team knowledgeable, hard working and great at communicating but they also pointed out issues that we had not thought of. Every aspect of the work has been carried out to a very high standard."
Clemmie and Jack
Chiswick · Google review
"Ben is a fantastic project manager, he doesn't pass any stress onto his clients. Tom is amazing — everything is possible according to Tom. The end result is phenomenal."
Sophie Weston
Clapham · Google review
"Absolutely brilliant firm. Hired them for a loft conversion. Really professional, great build quality, high quality finish. Great communication throughout. We are thrilled with the result and would hire them again in a heartbeat"
Peter Hughes
Google review
"Tom, Milen & Ben at Bluebird Spaces, 100% delivered on constructing our ground floor extension. The project came out on time, on budget and with customer happiness as their ultimate goal."
Dan & Maddy
Sheen
"Ben and Tom are just finishing a complete refurbishment of my two bedroom flat in Chelsea. They are a joy to work with. Responsive, helpful and always wanting me to get the best possible result. I recommend them wholeheartedly."
Barry Lynch
Chelsea · Google review
"We worked with Bluebird on our kitchen extension project. Highly recommend. They were transparent, easy to work with, had top tradesmen who care about delivering a good build."
Alex Ng
Wandsworth · Google review
"They were knowledgeable and explained each part of the process in terms that I could understand. All the workers are friendly, clean up after themselves every day. I would wholeheartedly recommend them."
Jane Farrelly-Ward
Richmond · Google review
"Using Bluebird for such a big project was the best decision we have made. They are our first call when we find another development."
Tony and Rhys
Fulham
"Tom was brilliant throughout the whole build process. It was a pleasure to be asked for a website review, after all they did for us. We are truly grateful to the whole team for the level of quality and for continually going the extra mile."
Rowan A
Wandsworth
"Bluebird was recommended to me by our local estate agent. Lovely guys and so pleased decided to go with them. Tom, Milen and the team on site were so professional and couldn't have been more helpful. Very happy clients."
Emma and Tom
Richmond
"We simply couldn't recommend Ben, Tom and Milen enough. The team was amazing for the duration of our ground floor project, which involved gutting and reconfiguring the lounge, kitchen and utility room."
Andrew Cork
Google review
"We used Ben and his team to completely refurbish our house as well as create a new en suite bathroom. Being an older house we had several unexpected issues but Bluebird Spaces managed to still get everything finished on time…"
Verena Peternell
Google review
Free site visit, then a fixed-price quote. No deposit upfront.
