Extension Planner is a Sussex-based extension design specialist run by Lizzie and Peter Smith.
We work across the counties of Sussex, Surrey, Kent and Hampshire, and specialise in helping our clients take an idea for making their homes bigger, work out the best way to do it, and help them get planning permission.
We not only have a ton of experience in planning and designing exciting extensions, many of which have featured in lifestyle and home magazines, we also have building and surveying experience, so are able to give you a much more comprehensive solution, as well as building tips and ideas that can save a lot of money in the long term.
We have a 100% planning permission success rate, and have never had to fight an appeal, because we take care to work with the client and the planners to make the process run as smoothly as possible.
We have been helping people design exciting and innovative extensions for over 25 years, and have a wealth of experience getting planning permission, particularly in Conservation areas, the SDNP, SSSIs and on listed buildings.
Many of our clients are facing a difficult choice - Move or Build?
We will always try to give you the best advice for your position and finances, even if it means we don't get to design anything, because we believe that a fair supplier is one you will come back to again and again, as indeed many of our clients regularly do as they move up the property ladder.
Do check out our website www.extensionplanner.co.uk which details our rates and lots of case studies from happy customers.
We're not the cheapest, nor the most expensive, but you won't get better service, or better value, and we always start with a free phone consultation.
Peter was extremely helpful from his first visit onwards, suggesting home improvements that hadn’t occurred to us, whilst also keeping costs in mind to stop us going wild. Very professional and clearly draws on a lot of experience as he takes a project on. Highly recommend! More...
Mrs Sarah Smith
It was such a blessing to have Peter’s experience and insight to hand - he was adept at translating our requirements, and at the same time brought lots of interesting and useful ideas to the table. The planning application process was seamless, as due to Peter’s knowledge we were able to submit plans that were right first time - he handled the paperwork and made the application so much easier than I imagined it could be. We could not be happier with the service we received. More...
We approached Peter as we were looking to extend our home, a major concern for us was that a similar plan to extend in the same area by a previous owner had met a number of objections and was subsequently refused by planning. We met with Peter who took the time to understand what we were looking to achieve and our concerns around the impact on the neighbours and planning. He came up with a design which met our requirements, addressed the concerns of the neighbours, and was granted planning permission on the first application. Very impressed with the service and would definitely recommend to others. More...
Thanks Rory. It was a most interesting project and we are delighted to have been able to help - that makes 12/12 with Horsham council in the last year!
We’ve really enjoyed working with Peter at Extension Planner. It’s been a very collaborative and open-minded process, resulting in a set of plans we are excited about and will hopefully be approved by planning.
Thanks Jill, As you know the planning went through seamlessly with some very positive comments from the planning officers - they loved your living roof!
Claire wall- Palmer
Really helpful friendly people. The design it’s self was so much better than I imagined it could be. Super please with the results and definitely fully recommend
Thanks so much again 😊
Thank you Claire it was a delight working with you!
Peter achieved what we hoped for our planning approval and would recommend highly
I wasn't sure if we would get it through, but the arguments we put clearly won the day!
Peter from Extension Planner has a wealth of knowledge about the local planning system, really listened to what we were trying to achieve and was very flexible in working with us to submit plans for our kitchen extension. We're expecting approval next week! More...
Thank you Mary, we look forward to seeing your fantastic new kitchen!
I would very much recommend working with Peter as he took the stress and worry out of our hands completely from the moment we contacted him. He was very flexible and fit his visit around our schedule. He spent time listening to our ideas and he made some valuable suggestions. We opted for Peter to submit our plans to remove the hassle of dealing with planning services. He kept is well informed at all stages of the process and the work was quickly submitted to planning. The whole process took less than 2 weeks and felt effortless. More...
Thank you Kath. It was a real pleasure working with you!
Mrs Pamela Carter & Mr John Slater
Highly recommend Peter Smith. Very reliable and answered queries even at Weekends. Had great patience with my suggestions, and came up with amazing ideas for my whole house and garage renovation.
Thank you Pamela & John - one of the most exciting and enjoyable projects (and clients!) we've worked with. Hope the build goes as smoothly!
Outstanding service. They really know their way around the regs and nuances of different local authorities' planning needs. Great people to work with and delivered an outstanding result More...
Thank YOU Philip. It was certainly an unusual and interesting brief, and we were really pleased you asked us to deliver it for you.
I've worked on two projects with Peter & Lizzie now and been deeply impressed with their ability to come up with answers to tricky problems at very short notice.
Lizzie has an eye for detail in the way things looks that is outstanding, and Peter produces plans that are clear, easy to understand and to a very much higher standard than many of the large and costly architect firms we have worked with in the past.
I'd recommend them to anyone looking to expend or update their house sympathetically and to a high quality. More...
Very kind Alan - As you know we generally never recommend nay suppliers, but in your case we're happy to make an exception!
We couldn't believe how tricky it is to get permission in a conservation area, but despite all the obstacles, Peter & Lizzie pulled it off, and we ended up getting not just one, but two excellent extensions. They are thoroughly professional, extremely helpful and full of good ideas. A pleasure to work with them. More...
Thank you Mike. Getting anything substantial in the SDNP is always going to be a challenge, and we were delighted that we could find a solution that worked for both you and them
A really great experience- We had a lot of different things we wanted to do, but not the budget, so getting the planning permission at the outset meant that we could work through the different aspects of the job over time, without having to worry about going back to the council each time we wanted to do the next bit.
It meant we had one less thing to worry about.
As designers we really could not have found anyone better More...
Thank you Paddy. It was a really interesting project - as you guessed we love traditional houses and its great to find a client that wants to bring out the best in them as well as preserve heritage
We had a particularly complex project - a thatched house conservation area, so needed a designer that could very tactfully design a major extension - we added around 50% of the footprint! . Peter & Lizzie were fabulous to work with. They really do know their stuff and we got lots of great ideas, as well as a seamless planning permission. More...
Thank you Paul. This was our first thatched house, so seeing it in Country Life was a huge plus for us. May you enjoy it for many years.
We found them to be very knowledgeable and helpful to work with. They brought an air of calm and confidence tot he proceedings, despite the complexity of the build. Whenever we spoke we learned something useful, and when we needed advice, they were always there. More...
Thank You Roger. It was a good fun project as well as complex, and we hope you will be equally delighted with the final results when it is finished.