House Extensions Sittingbourne

Looking to add valuable space to your property? At Alltrades Builders, we specialise in designing and constructing premium house extensions in Sittingbourne. As a local, third-generation family business, we handle everything from your initial architectural concepts to the final build.

Bespoke House Extensions in Sittingbourne – From Concept to Completion

Thinking about expanding your living space without the stress of moving? At Alltrades Builders, we specialise in delivering premium house extensions in Sittingbourne tailored entirely to your family's lifestyle.

As a trusted, third-generation family business with over 40 years of experience, we eliminate the hassle of dealing with separate architects and contractors by providing a seamless, all-in-one design and build service.

From your initial architectural 3D concepts and local planning permission right through to the final structural build, our expert team manages every detail under one roof to bring your dream home extension in Sittingbourne to life.

The All-in-One Process: How We Work

We handle the complexities of your build from start to finish, keeping your project on time, on budget, and entirely stress-free.

01

Architectural Design & 3D Plans

Our journey begins with your vision. We create bespoke architectural layouts and stunning 3D visualisations, allowing you to walk through your new home extension before construction even starts.

02

Planning Permission & Regulations

Navigating local building regulations and planning applications can be overwhelming. Our expert team steps in to handle all the paperwork and structural engineering plans, ensuring a seamless approval process.

03

Flawless Construction

Once plans are approved, our third-generation building team brings the designs to life. With over 40 years of local expertise, we manage the entire build with premium craftsmanship and absolute attention to detail.

Tailored to Your Lifestyle: Types of Extensions We Build

Whether you want to maximise your ground floor layout or add multiple storeys, our team designs and constructs extensions to perfectly complement your property.

Side Return & Rear Extensions

Perfect for opening up your home and creating that bright, modern, open-plan kitchen and dining area you've always wanted. We seamlessly blend the new structure with your existing property to maximise your garden space.

Double Storey Extensions

The most cost-effective way to drastically increase your living space without losing too much garden. Add extra bedrooms, a home office, or a master ensuite upstairs, while completely transforming your living area downstairs.

Wrap-Around Extensions

Combining a side and rear extension, this option completely transforms the shape and footprint of your ground floor. It is the ultimate choice for creating a luxurious, expansive living environment for growing families.

Why Choose Alltrades Builders for Your Extension?

With over four decades of local building heritage, we combine the reliability of a long-standing family business with premium, modern construction expertise.

Three Generations of Local Trust

We aren't a nameless corporate contractor or a pop-up building firm. As a third-generation, family-run business based right here in Sittingbourne, our family name and reputation are built into every single brick we lay. Our clients trust us because we treat every home transformation as if it were our own.

Complete Design-to-Completion Package

Juggling separate architects, structural engineers, planning officers, and multiple trade contractors is the number one cause of project delays and budget overruns. We completely eliminate this stress by handling the entire process under one roof—from your initial architectural 3D designs to the final coat of paint.

40+ Years of Certified Expertise

Every member of our team is fully qualified, and our business is completely insured for your absolute peace of mind. Over the past 40 years, we have built strong, trusted relationships with local building control officers across Swale, ensuring your extension strictly meets all UK Building Regulations and receives flawless sign-offs.

Serving Sittingbourne & Surrounding Swale Communities

Based in Sittingbourne, our structural teams provide premium design and build extension services across the entire Swale borough and surrounding Kent areas. Whether you are looking to renovate a property in the town centre, add a loft conversion in Milton Regis, or build a wrap-around extension in Bapchild, Borden, or Teynham, our local knowledge ensures your build meets all regional planning criteria.

Premium Features of Our Bespoke Extensions

We don't just add square footage; we design high-specification, structurally sound spaces built to modern energy and architectural standards.

5-Star Rated: What Our Clients Say

We pride ourselves on transparent communication, immaculate site management, and exceptional craftsmanship. Don’t just take our word for it – read through a selection of real reviews from homeowners across Sittingbourne who have trusted us to transform their properties.

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Robyn Barnes profile picture
Robyn Barnes
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Excellent service from Alltrades Builders Ltd We’re really impressed with the work carried out by Ben, Paul and the team. They knocked down a wall, completely ripped out our old kitchen and fitted our new kitchen, and the whole process was handled very professionally. They were extremely helpful throughout, offering advice and guidance whenever we needed it. Their knowledge and experience really showed, and they were able to suggest practical solutions and ideas that helped us achieve the finish we wanted. The quality of the workmanship is excellent, and we’re really happy with our new kitchen. The team were professional, reliable and clearly take pride in their work. We have already recommend Alltrades Builders Ltd to family and friends and to anyone looking for knowledgeable, professional and high-quality builders.
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Rahin Husen profile picture
Rahin Husen
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Their service is good. Appreciate it
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Peter Hughes profile picture
Peter Hughes
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We had Alltrades recommended to us by a previous customer and we chose Alltrades after getting two other quotes for our second storey rear and side extension. Alltrades came out as the cheapest, by some way and after meeting Ben twice we felt confident in him and Alltrades to do a good job. We went into the project having had bad experiences with builders, but Ben and the rest of the team were always very understanding and professional. The work was completed without any major issues and any minor unforeseen things that arose, Ben was always very open and transparent about the process and any additional costs that may be incurred. We are thrilled with the end result and would thoroughly recommend Alltrades to anyone. One of the best elements of Alltrades is their friendly nature and professionalism. They were always polite, friendly and helpful. They said bye at the end of the night and updated us on what was next. It was a pleasure to have each and everyone of the crew in our home. They were great with our two young children and made great effort to keep the house as clean as it can be. I was also very impressed with the ethos of Alltrades. Their logo clothing, vans and signs all broadcast to everyone around who they are and that they therefore standby the quality of their work. I was especially impressed that after our scaffolding and tin roof went up, Alltrades added an extra sign to the side, meaning everyone around could see who the builders were. I felt assured at this and that the quality of their work would be high, as you don't broadcast who you are if you have anything to hide. Similarly with their social media presence, Ben and his team are open to the work they do and want everyone to see. We would go back to Alltrades for any future work ( and have done already for some garden steps and driveway since finishing the extension) and would highly recommend to anyone. Thanks again to Ben and crew, Peter, Rachel, E , L and R.
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Richard Ebreo profile picture
Richard Ebreo
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Amazing builders! Went with AllTrades for our 2 storey rear extension four years ago as they came highly recommended by our architect. Ben also gave us a clear and detailed quote and his team were extremely hard working and professional throughout. Would highly recommend AllTrades to help you build your dream extension!
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shelly massey profile picture
shelly massey
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Really pleased with work completed removing kitchen, laying new floor and reinstating old kitchen. Punctual, polite and would highly recommend
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Ray Pointing profile picture
Ray Pointing
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I would like to thank Ben and the team Alltrades Builders for the magnificent work they done to our home, they completely transformed it and gave us the house of our dreams! The team were trustworthy and very respectful in our home, we would definitely be using the team again for future works and would highly recommend their services. A few before and after photos below. Thanks Ben
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Alison Waterman profile picture
Alison Waterman
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When we first met Ben we knew that we had found a reliable honest builder. We discussed what we wanted and with Bens knowledge it has become reality. we didnt have to do a thing it was all done by Ben from plans to finished project. Ben even built in my dresser very impressed .Even when we had an issue Ben gave suggestions of which we went with and we are so pleased we did it has turned out so much better than we thought.all the builders were friendly hardworking and conscientious special Shout out to Trev he built a bridge every night for my elderly dog so she could get down the garden nothing was too much trouble also loved the singing!! So impressed had them all back to build a patio and Ben squeezed me in so i could host a pre wedding party for my son !! Cannot recommend Ben and his team enough 5star
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annette webb profile picture
annette webb
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I would not hesitate to recommend Ben and team to take on your building job. Paul you cannot fault his work Ivor and his father for their excellent brickwork. Not forgetting getting Scot. The plaster Lyndon for the best work ever.
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David Curry profile picture
David Curry
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The plans for our 2 storey side and single rear extention have been in the making for nearly 5 years. From initial architecht drawings, to planning applications and the search for the right builder has taken time and patience. We had several builders provide quotes for the works however we were drawn to All Trades Builders who had already built a similar extention local to us. After careful condideration and several reviews and adjustments to the planned works and quotes we knew that All Trade Builders were the right choice for our build. In April 2025, All Trades Builders demolished our old garage and broke ground for the foundations to the new extention. They worked through the summer building the main structure, including steel beams and new roofing then completed the interior with electrics, plumbing and all fixtures and fittings including the new kitchen, family bathroom and downstairs WC. Throughout the build we have completely trusted the All Trades Builders Team and our neighbours have also been very complimentary which for a build of this duration is also important to avoiding any uneccessary disputes. We've had to make some changes as we have progressed and we've also asked for lots of extra works to be carried out and All Trades Builders have been very professional dealing with this. In addition the payment plans and communication have been very clear and easy to understand and follow. All in all, an excellent project delivered by an outstanding team who I would highly reccommend to anyone else considering new building works in 2026.
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David Crane profile picture
David Crane
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I would like too highly recommend Alltrades builders, for any job that you want doing to the highest standard. Ben and his team have worked extremely hard over several weeks to carry out our loft conversion. The team were punctual every day and displayed the highest order of professionalism. All the work was carried out to the highest of standards. The lads were polite and respectful of our home and cleared all mess daily. Thank you Ben Warboys and your team, Paul, Ryan, Joe, Scott. And Jack. I will add more photos when we have painting done and carpets are down. Before and after

house extensions sittingbourne- Frequently Asked Questions

Get fast answers to our top questions. 

How long does a typical kitchen or rear extension take to build?2026-08-19T08:55:43+00:00

A standard single-storey rear extension typically takes between 8 to 12 weeks on-site, depending on structural complexities like knocking down load-bearing walls or installing heavy steel beams. Because we manage both the architectural design and the build phases under one roof, we eliminate contractor handover delays, keeping your project tightly on schedule.

How much does a double-storey extension cost in 2026?2026-08-19T08:55:31+00:00

Extension costs vary significantly based on material specifications, structural engineering requirements, and ground conditions. On average in the UK, a standard extension ranges from £1,500 to £2,500+ per square metre. We provide a completely transparent, fully itemised fixed quotation during our initial design phase so you can plan your budget with zero hidden surprises.

Do I need planning permission for a home extension in Sittingbourne?2026-08-19T08:55:18+00:00

Many residential house extensions fall under Permitted Development rights, meaning you may not require full planning permission. However, this depends entirely on the size, height, and boundary limits of your project, as well as whether your property is in a conservation area. As part of our comprehensive design and build service, our team handles the entire assessment and submits all necessary paperwork to Swale Borough Council on your behalf.

latest news

Explore our latest insights, design inspiration, and expert building advice. Whether you are wondering how to plan a home extension, looking for loft conversion tips, or following our latest updates in Kent, you will find it all here.

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