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Welcome to Extension Plans UK

Unlock the full potential of your property and simplify the journey

With our fast, affordable and comprehensive, one-stop solution for all of your planning permission and building regulation needs! We offer cost-effective solutions without compromising quality.

  • ARB Registered Architect
  • Price starting from £995 plus VAT
  • 12 Working days Turnaround

We’re with you all the way

Welcome to Extension Plans your local London architects, where we turn your home aspirations into reality. Our expert team of residential architects are committed to enhancing your living space, affordably and efficiently.

At Extension Plans, we redefine the landscape of residential architecture by offering cost-effective solutions without compromising quality. Our experienced team excels in handling all applications for you, free of charge, and managing the entire process until completion. Discover a world of innovative design, where affordability meets speed, and let us transform your home into a space that mirrors your lifestyle and exceeds your expectations. Welcome to a new era of architectural efficiency.

Proudly working with all London Boroughs

Why choose us?

From new build housing projects to the creation of a new porch, our experienced design team has worked on every type of residential alteration throughout the years !

Fully Qualified Architects

We are committed to delivering plans of the highest standard, and that starts with our team of fully qualified architects and technicians. Our team includes a diverse mix of talents, allowing us to match each customer with the designer best suited to their unique project.

Competitive Pricing

We stand out as a cost-effective solution in the architectural industry, offering competitive pricing without compromising on the excellence of our services.

12 Working Days Turnaround

Our commitment to an efficient service means that you can expect your initial plans to be created within just 12 working days.

All inclusive service

We pride ourselves on delivering a comprehensive and all-inclusive service to our clients. By working with us, you eliminate the need to outsource various components of your project, streamlining the entire architectural process under one roof.

Years of Experience

Benefit from our vast experience. With a large portfolio of diverse projects, our design team brings their extensive experience to each project we complete. This wealth of experience not only fuels our creativity has also led to a deep understanding of planning regulations and navigating applications successfully.

Get inspired!

Check out our latest projects

Book a free consultation or a call

Explore our Services

Let’s get started!

We offer a free 30-minute consultation call with one of our design consultants. We’d love to discuss your project and unlock the potential of your home!

You can book this below, alternatively feel free to call our office on 020 3633 1082 for a free advice discussion.

How are we different to other architects?

Traditional ArchitectsOnline Competitors
Fixed Price
Immediate Start
Planning drawings
Council application submissions
Registered Architect
Flexible Project Timeline
Building Control Drawings
Advanced Drawing Technology
Remote Meetings

Our clients say it best

Here’s what some of our customers say:

I am delighted and pleased with the service provided by Extension Plans UK Limited. I contacted the company because I needed to relocate my Kitchen. I also wanted to build an outbuilding garden family shed. The Architectural team kept me informed throughout the whole process. The company’s Architectural team were always available to answer any question, reply to emails, and assisted me with Architectural drawings, drawings Alterations, and Council Application drawings, Party Wall Notices. Philip Jennings and Kate Haughton were very helpful and patient enough to guide me throughout the various processes. I would highly recommend Extension Plans UK Limited

Folarade
Rear extension and Outbuilding

What a fantastic service I have just received from the whole team at Extension plans UK. I needed extension plans drawn up as my husband is disabled and we required a large downstairs bathroom and a re-jig to our kitchen. On first call to Phillip, he explained the best way forward and gave us the heads up on what’s next. Mackenzie then made regular contact keeping us updated with all the procedures needed. Even taking us though permitted development. Natalia drew up the plans, tweaking them to suit our personal needs. Extra wide doors ect, to a high standard. All the staff were very attentive, polite and delivered what we asked for and more. We could not have asked for a better service.

Alison
Loft conversion and side extension

Extension Plans UK are competitively priced and their staff are really knowledgeable and helpful. Although they offer a fixed price service, Mackenzie, the administrator for our project, and the architects Kamila and Berkay, spent a lot of time with us. Kamila and Berkay listened to our ideas and talked through the details of the design and the construction. They took everything we had said into account and designed a scheme that gave us everything that we wanted. All the staff at Extension Plans UK were easy to contact and very helpful so we felt well supported through the whole process.

Tim
First floor addition

I can’t rate Extension Plans highly enough. They definitely exceeded my expectations. Initially I was unsure to use their service as their approach is so different to a traditional architect. But Philip explained EPs approach so easily and provided me with the comfort I needed to select them for my extension project. I was also amazed how quickly the team responded to emails. And even when things are unclear it’s simple to call them and they take the time to explain. Even when the Council asked for iterations to the drawings the turnaround was so quick by the team. Can’t thank Philip, Rebecca, Francesca, Joshua, Cameron and the rest of the EP team enough for all their support over the recent weeks and allowing us to build our dream extension.

Darryl
Double storey side extension

We used Extension Plans for the renovation of our three bed terraced house, which included a ground floor rear extension and loft. I had originally planned to go with a much more expensive architect but opted for Extension Plans to keep costs down. I’m glad I did because they did exactly what we needed them to. Created the plans, building regs drawings, structural calculations, party wall notices all on time, handled the relevant applications and calculatio I on time, ho dled the relevant answered all my questions. Also introduced us to a bunch of builders via a couple of tender platforms. No surprises and very straightforward. Thanks to Kamila, Mackenzie, and Cameron.

Charlotte
Renovation, rear extension and loft conversion

Highly recommend! Great service from start to finish. Had Extension Plans UK interior design department draw up some plans for my dated living room and bedroom and made a massive difference!
Ella was polite and professional throughout, quick with replying to emails and very helpful. Can’t recommend them enough!

Jane
Interior design service
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