We used Extension Plans UK for kitchen infill plans and have had a smooth experience from start to finish. Rebecca Parnell kept communication clear and timely throughout the process, making everything... See more
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Extension plans Uk made us feel comfortable right from the off, their staff were extremely professional and helpful throughout each phase. Phillip and Josh were always available to assist with any que... See more
From the start we received clear and informative communication. The entire team from the surveyor to the design guys and everyone else involved has been super helpful. Would definitely recommend.
Absolutely no hesitation in recommending Extension Plans UK. Phil in particular was great at taking our original idea and turning that in something we hadn't even considered making better use of the s... See more
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Company details
Written by the company
We are extension plans UK! We offer a new, quicker, and cheaper way to obtain architectural drawings for all your planning needs. Book in a free design call to discuss your project and answer any questions, we will then send a surveyor around to your property and our ARB registered architects create professional architectural design plans which are submitted to the council for planning and permitted development approval. Our streamlined system means you receive your drawings a lot quicker, and at a fraction of the cost of your local architect without compromising on quality. We now offer 0% Finance!
Contact info
Ealing Cross 85 Uxbridge Road, W5 5BW, London, United Kingdom
- 02036331082
- info@extensionplansuk.co.uk
- extensionplansuk.co.uk
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Bourne End Single floor extension
Very helpful and efficient from the start. We spoke to the MD who led us through the process. We had one of the Architects do a virtual tour and the whole team have been very efficient ! And the plans got approved before we expected!
Special thanks to Rebecca who does all the admin and keeps you well informed of what’s what and where you are in the process.

Reply from Extension plans uk
Great Team
Great Team, Phillip, Joshua and Rebecca helped greatly to achieve the permission in the first round.

Reply from Extension plans uk
Superb architectural and building service company
Excellent personal service from start to finish. You are dealing with people who really care about delivering your project as you want it. Their knowledge is spot on and I can't recommend them highly enough.

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Reply from Extension plans uk
Plans Drawn up very quickly
Plans were drawn up within a week and any ammendments were quickly sorted. Would definitely use again for other projects.
Builders were also very happy with the drawings.

Reply from Extension plans uk
Great, but know what you want
Price wise its a no brainer from the other companies I looked at, but know exactly what you want. They're not here (or at least I felt like) they don't invest in and explore ideas - but at the same time I knew exactly want I wanted, done my research into buildings regs and permitted development etc.
But there also comes my extra guidance too, of make sure you tell them.
I sent drawings through with just 1 skylight window in the attic (because I was future proofing for potential solar panels) but I didn't say that and the first drawings came back with 3 skylights spanning the full width of the roof.
So yeah, good but know what you want.

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Extension Plans Uk were great from…
Extension Plans Uk were great from start to finish, quick to respond and quick to produce drawings. Mackenzie, Kamila and Natalia were all brilliant. Alex, Kempston.

Reply from Extension plans uk
Quick and professional
Extension plans were great from the fist call. All details were explained thoroughly and plans drawn out quickly and efficiently. Great communication. Would use again and recommend!

Reply from Extension plans uk
Extension Plans have been super…
Extension Plans have been super efficient , very informative and guided us well through the Planning process . I would recommend their services to everyone. Very professional & helpful staff too, We really appreciated the fixed quote for all works too.

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Great service with friendly and accommodating team!
From the beginning the team at Extension Plans UK were super helpful and friendly, they gave us an accurate quote and have been amazing at communicating with us regarding any questions we had during the extension drawing stage, giving us updates on our planning application, and giving us advice not only on the drawings but the whole process. We've been really pleased with the service for our extension and would definitely recommend them, or use them again in the future. Thank you!

Reply from Extension plans uk
First-time homeowners with leasehold property. Extension Plans ticked all the boxes.
As first-time homeowners with a leasehold flat on council-owned land, understanding the planning process and getting permission for an extension was set to be a challenge, but Mackenzie and the team were knowledgeable, professional and always on hand to answer our questions right the way through. We got the permission, so thank you Extension Plans for all your work. Would definitely recommend.

Reply from Extension plans uk
Great customer service and a great price
From my first initial contact and zoom call my experience has been positive. Joshua and Rebecca in particular have been super responsive. Everything I wanted was made possible from those early calls. They listened to what I wanted and the drawings were great. Faultless, always at the end of an email. All my silly questions answered. I'm a super happy customer and have told everyone I can about their service. Absolutely recommend

Reply from Extension plans uk
Rebecca and the team were easy to reach…
Rebecca and the team were easy to reach and great to deal with. would recommend for all of your planning and building regulation compliant drawing needs!

Reply from Extension plans uk
Easy, streamlined process
I'm in the process of carrying out a loft conversion and extension. Rebecca, Joshua and the rest of the the team at extensionplansuk have been top notch when it comes to producing high quality plans / submitting to the council. They've also helped with finding quotes from builders.
Reasonable fees, and relatively stress-free, highly recommend.

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Really helpful when I had issues with…
Really helpful when I had issues with my original architect. Rebecca was friendly and thorough, and also chased up loose ends to make the prices as smooth as possible. Would happily recommend!

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Retrospective Planning application
I had a good experience with this company, it was very quick and easy to use their services and the price was extremely reasonable and very good value for money.
So long as you are happy working over the phone and online, then this is a really quick, easy and cheap way to get a very good service

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5 Stars Team
Really Happy with the overall (stress-free) experience.
Quick responses to my emails and very knowledgeable team

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Incredibly Helpful and Supportive
Incredibly Helpful and Supportive. Provided a lot of help and suggestions to get the most out of what I wanted to achieve. Quick to respond and great at incorporating feedback

Reply from Extension plans uk
A Solid Choice with opportunities to Improve
Overall, I was pretty happy with Extension Plans UK for my house extension and loft conversion. They delivered quality drawings quickly and at a competitive price, and the team seemed genuinely invested in my project. But, like any good relationship, there's always room for improvement.
The Good:
Clear quotation and competitive pricing: They stood out from the 10 others I got quotes from.
No pressure sales: A refreshing change from some pushy design companies.
Fast and detailed drawings: I had everything I needed within two weeks - both plans and building reg drawings.
Phillip, the Head Architect (I think) was full of ideas and creativity during the initial consult.
Joshua, my assigned architect, explained things well: He ensured I understood the council regulations and their impact on my choices.
Rebecca, the customer service champion: Always patient and clear, especially when explaining the confusing council stuff.
Reassurance and progress updates: Rebecca kept me informed and feeling confident about the process.
Areas for Improvement:
Confusing email communication: Too many cooks in the email kitchen – Joshua, Rebecca, even Cameron? Overlapping topics added to the mess.
Payment options: Would be handy if they supported more than just bank transfers.
Not all the architects seemed to have the same creativity as Philip... My assigned Joshua, at first, seemed eager to just draw and not explore my ideas.
Example being, when I had the very first consultation with Phillip we went through my rough ideas as at this stage I hadn't chosen to go with Extension Plans UK - they were just a candidate. But once I chose them. Joshua wanted to jump straight in and draw the plans based on that very preliminary conversation with Phillip - I didn't really like that approach. Reason being that, Extension Plans only provide you with 1 revision to the plans before you have to pay extra, and working in a customer-centric organisation myself, it felt like the natural thing would be to reset and confirm my plans in case anything had changed.
Example 2, on the creative side... I wanted a 4M extension, which would fall under 'Permitted Development - Larger Home Extension' guidelines requiring neighbour consultation. My initial idea was for a straight roof with a large glass ceiling lantern. When doing his research, Joshua initially advised there might be some heigh challenges and immediately went and drew up plans for a 3M extension because having a 4M extension with that type of roof would result in the Eaves height exceeding the 3M height threshold. But I would have liked him to have provided some options first that would have helped me keep my ideal design of a 4M extension… When I did some deep thought on it, It was clear that adding a second internal step and/or changing the roof to a pitched one got us around this height obstacle and allowed me to keep the distance to 4M... This is something I'd have liked Joshua to think about and propose.
When I got into this process, I was looking for an architect to provide some creativity to help me formulate my designs, especially as they’re in the unique position where they can draw upon past projects, which they can use for inspiration and push the boundaries.
Appreciate it might sound very minor, but something maybe to consider for future 'introduction calls', to really understand what's critical for a customer.
That said, after I mentioned it to Joshua that I needed his creativity, he did start providing his thoughts on what things I could consider, which was super helpful and appreciated.
One revision limit feels tight: Big projects and big ideas need more wiggle room.
An online portal would be a game-changer: Track progress, store documents, and avoid email overload.
In Conclusion:
Extension Plans UK did a very good job at a fair price. They're reliable, communicative, and customer-focused. If you need some simple plans, they're a solid choice. But if you're looking for design fireworks and constant creative brainstorming, they may not be the right fit.
Great service and a really competitive…
Great service and a really competitive price! Whole process went super smooth and we had our planning approved within a matter of weeks! Highly recommend
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