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Craig got in touch quickly, gave me a rough estimate over the phone and answered all my questions. Surveyor arrived on time, gave instant quote. Price was good. Michael and (another) Craig turned up to do the job on the day, time given. Good, tidy job. Can't fault anything, from start to finish!! Would recommend!
Mary
George and his team are experienced builders, replaced my front door with a custom frame/sidelights and raising the floor level in the hallway quite quickly - in fact, they were the only who came next day, gave a quote straightaway and were ready to start in just couple of days. They also had all the necessary tools and materials, were ready to buy something additional quickly on the day - if further adjustments were required to fit everything as I asked. Thanks a lot for your help, guys!
Dmitry
Highly recommend. These guys did a fantastic job of constructing our pergola and decking. Very hardworking and reliable. The job was completed in the time frame agreed and to a very high standard. We would 100% use them again.
Holly
Find everything you need to know about hiring a local cellar conversion specialist. Extend or renovate an existing basement, or excavate a new one from scratch. Below, we cover tips to help you find a basement conversion specialist:
Browse Cellar & Basement Conversion specialists
Take a look at our Cellar & Basement Conversion specialists profiles, read reviews and request quotes directly.
How to find a reliable, local basement conversion specialist
A basement conversion has the potential to add a lot of value and space to your home. Once your team excavate your new basement, you can turn it into a bedroom with an ensuite bathroom, a new gym, a living room, or any other living space.
Transform your underground spaces into useable rooms with the help of a skilled cellar conversion specialist in your local area.
What does a cellar conversion involve?
If you already have a basement, then you might be looking to turn it into a liveable space by adding structural supports, damp-proofing, insulation, heating, and a new ventilation system. If your cellar was intended for storage and has low ceilings, your basement conversion team might have to dig down to increase the head height before they can add things like new plumbing and electrics.
Or, you might be thinking about extending your current basement, such as by digging underneath your garden. This is another great way to add more space and additional rooms to an existing basement.
If you don’t currently have a basement, you can also create a new one by carrying out excavation work. As well as the basement, you’ll also need a new staircase.
Whether you want to build a cellar from scratch or want to turn your cramped storage room into a brand new living space, a basement conversion specialist can help.

Factors to consider before hiring a basement conversion specialist
On average, a basement conversion can take anywhere from 12 to 20 weeks to complete. Avoid stress and costly repairs down the line by hiring a skilled specialist to help you upgrade your home. Look out for basement conversion installers that:
- Are a skilled company with a strong history of high standard projects
- Have all the licenses and insurance needed to protect you and their workers
- Have a good range of positive reviews from previous customers vouching for their reliability
- Are available to carry out the work in the timeframe you need it by
- Are quoting a price and payment option that you are happy with, having compared the quote with other basement conversion companies
A local basement conversion specialist is more likely to respond quickly as they’ll be right around the corner and ready to help.
How much does a basement conversion cost?
If you don’t have space for a rear or side extension, and don’t have a loft to convert, then a basement conversion is a great option to maximise your home’s space. How much you’ll end up spending on your basement conversion depends on a range of factors, including:
- The size and layout of your basement
- How many structural changes will be needed, including extra support beams and underpinning
- Waterproofing and damp proofing costs, as well as the installation of effective drainage systems
- Whether you want a window well installed, which can help you introduce light into your basement
- Basement insulation and soundproofing
- Labour costs, which are affected by where you live in the UK
The average basement conversion costs between £120,000 and £160,000. For a more accurate quote for your specific project, speak to a basement conversion specialist today.
Do I need planning permission for a cellar conversion?
You won’t need to apply for permission for a cellar conversion, as long as:
- You’re converting an existing residential basement into a living space
- How you’re using it isn’t significantly different and the basement isn’t a separate unit
- You don’t alter the external appearance of the property, such as by adding a light well
- You don’t live in a listed building
Excavating a brand new basement which involves major works is likely to require planning approval.
For more information, contact your local planning authority or visit the Planning Portal website. You can also read our planning permission guide for more information.

Questions to ask before you hire a basement conversion specialist
Whether you’re looking to build a brand new basement or simply want to extend or improve your existing cellar, there are a few questions you should ask before you hire a specialist to excavate your new room:
Do you have public liability insurance and what does this cover?
While it’s not a requirement for them to have it, it’s a good idea for your basement conversion specialists to have public liability insurance to cover you and them against any accidental damage done to your home or personal injuries. Make sure to always ask your tradespeople what insurance they have before you hire them. This will guarantee protection for both parties.
How many years of experience do you have?
Knowing how many years of experience your basement conversion specialist has will allow you to pick a tradesperson who you are confident has enough experience to carry out a high quality job. When you’re finding a tradesperson through Rated People, head over to their profile to check out the pictures on their work gallery and their ratings and reviews.
Do you use subcontractors? If so, are they licensed and insured?
Your basement conversion specialist is likely to employ subcontractors. It’s a good idea to confirm the qualifications and insurance coverage of everyone who will be working on your project, including surveyors, structural engineers and electricians. Anyone working with gas needs to be registered with Gas Safe, and anyone installing electrics (in England and Wales) needs to be Part P certified to be able to self-certify their work. These tradespeople will have valid documentation that you can ask to check.
What is your estimated timeline for completing the project?
Knowing what the estimated timeline for completing the project is will help you set realistic expectations about how long your basement renovation will take to complete.
How much will the job cost?
Asking how much the job will cost will help you budget for your project and will ensure price transparency before you hire. How much you’ll end up spending depends on the scope of your project, and where you live in the UK, so make sure you add plenty of details when you post a job.
we are experience refurbishment contractors. we are reputable and reliable builders, established since 2010 and over 20years experience in building trade. using our skill and materials, we are eager to ensure that our customers are completely satisfied.
Did not received the quote / response after sent the details.
We are proud to be a top rated, reliable and well respected company with a fantastic team of experts providing outstanding levels of service when it comes to plumbing painting tiling bathroom and kitchen fitting and full house renovations in London and surrounding areas. We carry out all types of work, no matter the size - from small plumbing maintenance jobs such as leaking taps or burst pipes and other domestic work, right up to large installations such as Full house renovation. All of our work is fully guaranteed and we offer professional and efficient Handyman services near you at a competitive cost. Our aim is total customer satisfaction. Not only do we retain our client's custom over many years, they also become our ambassadors recommending us to their relatives, friends, neighbours and business associates.
Nik did a great job with the shower. His team and himself worked efficiently, dealt very well with unexpected problems and were communicative and open about what needed to be done, all for a very reasonable price. Would definitely hire again and recommend to others!
BUILDING CONTRACTOR Garage Conversions / Property Refurbishments / Extensions / Electrical / Plumbing and Heating Service. 35 Years of Satisfied customers Quality service and value. Wall & Floor Tiling Plastering Brick and block work Damp Proofing Garden Walls Pointing Garage Conversions Full Property Refurbishment Our Passion and Commitment We pride ourselves on exceptional service and outstanding results in every thing we do. Before we start we’ll meet with you and discuss your options and budget, meaning, we’ll know what will work best for you to deliver a outstanding bespoke project to fit your requirement . Please call us for free friendly advise.
Neale is lovely to deal with whilst being professional, punctual and skilled. I didn't believe builders like this still existed. He turned up on time, every single time he said he would. He produced a detailed written quote and then didn't increase it throughout the job. He and his side-kick, John, worked non-stop overcoming every issue our wonky victorian terraced could throw at them. I'm so relieved and impressed. He's now my go-to builder.
Ashco Contracts Ltd.
Cellar & Basement Conversion
30+ 5 Star Reviews on Google!! New to rated people Ashco Contracts Ltd is a family run building contractor serving the Essex and surrounding areas. The company is run by twin brothers Callum & Ash, who took the business over from family in 2015. Since then the business has has come along way and many hours have been spent on site and in the office to get the business where it stands today, which they are extremely proud of. A combined total of over 25 years in the construction industry, Ashco prides itself on repeat business and reputation. Weather it be a small repair job or a large extension you are in safe and secure hands with Callum & Ash.
Welcome to this site. The client is the most important visitor on our premises. They are not dependent on us, we are dependent on them. They are not an interruption to our work, they are the purpose of it.
Fitted some lintels for me. Michael was friendly, knowledgeable and easy to work with. Turned up when agreed and did an excellent job. Would highly recommend this Company.
Proud tradesman following on from my father’s footsteps who acquired the BEM in person from the queen recommendation for services and works carried throughout the north east . I’ve 38yrs experience in plumbing and bathroom fitting , was one of the very first sub contractor bathroom fitter nationwide for National operated Dolphin bathrooms who Owened the Mobenkitchens and sharps bedrooms. Experience in budget , mid range and high end bathrooms from strip Out to completion fully managed. Take pride in customer communication and very competitive pricing to suit , love transformation on completion nothing better seeing a happy customer .
Installation of new toilet with smart toilet seat. Very quick and clean work. Fantastic job and would definitely return for my plumbing needs.
TESY AYCE KIERAN
Cellar & Basement Conversion
Hi, we are a small business based in DONCASTER,and surrounding are. We specialise in bathroom refurbs, disabled level access wet rooms, tiling and plumbing. We offer a very friendly and enjoyable service as we know having work done can be a stressful which is our top priority to make sure this isn't the case. With 10 years’ experience we now have the experience at hand to make sure all work is at the highest standard. We are fully insured for all work we carry out. We always offer a competitive quote for our work and we are very professional at what we do. We pride ourselves in our reputation. We hope our feedback speaks for itself. K&F decorative is one of the Doncaster Property Maintenance Service. We have over 10 years’ experience in property maintenance, working in high end residences, as well as office and retail spaces. It is our aim to provide an outstanding, bespoke customer experience, to leave every customer delighted with the service and the job they have received . Our tradesmen carry out thousands of skilled jobs including: plumbing, handyman, painting and decorating, finding and resolving leaks, dr
Very punctual and helpful and job done to perfection Many thanks
We are a groundwork’s and building company with 20 years experience
Jay and his team connected our garden house to the water supply and sewer network. They worked fast and did a very good job. Our terrace looks better now than before! The quote was honest for the amount of work. I really recommend them.
Hello everyone, I am civil engineering, I worked with different company in France and UK , I finally decided to create my own company COMFOROOMS LTD. I have long experience in building and groundwork . I am a serious person, I like my job, I respect my customers and I always tried to make them happy. I promise you a good job, nice and clean. You have my warranty for every job I will do. I am looking forward to hearing from you soon Thank you H.Turki Director
Hass from Comforooms had a tricky problem to investigate the cause of a leaky shower that had caused damage. It was more complicated than initially thought, but Hass pin-pointed the issues and explained what was required. He and his workmen were very skilled and tidy. Hass is extremely methodical and knows what he is doing. An excellent job, 5 out of 5. Will use again for sure.
Gabrica Ltd is a leading construction company renowned for its commitment to excellence, innovation, and client satisfaction. With a proven track record of delivering superior quality projects across residential, commercial, and industrial sectors, Gabrica Ltd stands out for its meticulous attention to detail, stringent adherence to timelines, and unwavering dedication to customer service. Equipped with a team of highly skilled professionals and state-of-the-art technology, Gabrica Ltd excels in every aspect of the construction process, from initial planning and design to construction management and final delivery. Committed to sustainability and environmental responsibility, Gabrica Ltd integrates eco-friendly practices into its projects, ensuring a lasting impact on the communities it serves. With Gabrica Ltd, clients can trust in a partner that consistently surpasses expectations, delivering exceptional results that stand the test of time.
Very punctual hardworking and efficient person. Also a good sense of humour - made the experience better
PREMIUM BUILDING & LANDSCAPING Services With over a decade of experience we are the 1st choice when looking for a partner to advise and design your outdoor space into an extension of your living area. Patios & Paving, Hard landscaping, Decking & Fencing, Artificial Grass & Turf are just some of the projects we undertake. Everything you need in one place by a trusted name in the landscape gardening area Let’s sit down and talk about your vision
Absolutely delighted with the cost, customer service and finished job by Paul and the team. Would definitely recommend this company.
Professional Home Refurbishment LTD is a premier company with over 28 years in specializing in transforming residential spaces into dream homes. With a keen eye for detail and a commitment to quality, our team of skilled professionals offers a comprehensive range of services, including kitchen and bathroom remodeling, flooring installation, painting, and general home repairs. We pride ourselves on delivering exceptional customer service and ensuring that each project is completed on time and within budget. Whether you are looking to modernize your living space, increase your home's value, or simply refresh its appearance, Professional Home Refurbishment LTD is your trusted partner in bringing your vision to life.
An accomplished business where customer needs comes first. We are a dependable team with 25 years experience. Our aim is to attain positive communication with our customers as well as providing reasonable prices for all our clientele. Our specialties expand to various qualities, and we are profoundly able in achieving and carrying out plastering and rendering, painting, boiler installations, unvented cylinders, gas safe checks, bathroom renovations and all home improvements. Collectively, our main goal is to ensure our customer is content and that our work reaches their full expectations.
An appointment was rearranged for Lewis and his Adrian to come and give me a quote for my driveway. They arrived on time.
We offer 24/7 solutions to all your property maintenance needs, whether it’s a small task such as assembling a desk or a seemingly daunting full house refurbishment. It is our extensive experience within the industry, combined with passion, innovation and dedication that makes our clients choose us for all maintenance or building services required. Our professional staff will guide you from your first encounter with us all the way to billing and subsequent repairs and we guarantee that you will look nowhere else for assistance!
It was great to have Kh&n for my job because he shows so much professionalism and able to do the job wholeheartedly. He is kind as well and I’m happy to hire him for more jobs infuture or recommend him to my friends.
Taurus Home And Garden
Cellar & Basement Conversion
Taurus Home and Garden was launched in 2021 with the aim of providing our clients with an honest and reliable service, specialising in what we love most: landscaping and damp-proofing. Taurus is a Sussex based company where a clear vision for each project is shared among us, the contractors, andhomeowners. As well as landscaping and damp-proofing, we also undertake renovation projects on request – you only have to ask! Our goal is to become the go-to company for landscaping and damp-proofing work, and to share our vision of creating, improving, and protecting every space we have the opportunity to work upon. We aim to restore trust in contractors by delivering clear, well-planned, and expertly executed projects to our clients, providing full transparency throughout. We understand the anxieties many people experience when entrusting their home visions to others. Our transparent process, from planning to completion, is designed to help our clients rebuild that trust.
NORTH WEST LONDON RENOVATIONS is a well established, trustworthy, reliable and professional company. We serve Acton, Ealing, Hammersmith, Kilburn, Paddington, Brent, Westminster, Hampstead, West Hampstead, Primrose Hill and all surrounding areas of N, NW and Greater London. Our service is professional, caring, and high quality. Our customers rate us highly for our ability to stick to deadlines, and for the quality of our workmanship. We provide a professional service from the initial free quotation to the end professional finish. Our service is friendly, clean and tidy, and reliable. We consider no job as too large or too small and offer very competitive prices
Had scaffolding up very quickly. Started job on time and finished in a week. Very impressive. Good communications and reasonable price.
Hi :) I have a range of experience across the trade, with specialised expertise in the following areas,over 12 years: -in Drylining -in Carpentry - in refurbishing restaurants and houses. -Loft Conversions -House extensions After all that, I finally have the team, which we can do jobs from A to Z - Plumbing (gas safe certified) - Electrical (Certified) -Roofs -Loft Conversions -Extensions -Groundwork -Gardening -Fencing -Waste removal I'm happy to help across all jobs and answer any questions. Thanks for passing by, and I hope to hear from you soon :)
Job done to very good quality but job did run over due to the Christmas period overall very happy
35 years experience, I specialise in stonework and brickwork, I do all aspects patios fencing, resin drives
Rob and his team were excellent. On time, tidy, polite, came out with several solutions and most importantly, were very competitively priced. I will definitely use Rob and team again for future work. Amazing work guys!
Established in 1994 Dampshield has an excellent name in the industry. We are happy to have consultations with you to go over plans before giving you a free quote. Dampshield are fully covered with public liability insurance and our Health and Safety regulations are always adhered to by constantly enforcing our on-site poli-cies.
Excellent service. Very friendly. Excellent price. Would recommend and use again
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