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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.
Renova is a premier all-trade business specialising in a comprehensive range of building and home renovation projects. With expertise spanning every trade, we provide a seamless, end-to-end service for projects of all sizes, from small-scale refurbishments to large-scale developments. Our highly skilled team ensures exceptional craftsmanship and attention to detail, delivering outstanding results that exceed client expectations. In addition to our core renovation services, we operate a sister business based in Alexandria, West Dunbartonshire. This facility boasts a 3,500 sq. ft. showroom showcasing an extensive selection of high-quality kitchens, bathrooms, flooring, doors, and fitted furniture. This showroom allows our clients to explore a diverse range of premium products, ensuring they find the perfect solutions for their home improvement needs. Complementing our showroom, we have a state-of-the-art manufacturing facility dedicated to kitchen and bespoke joinery production. Our expert craftsmen utilise advanced techniques and the finest materials to create tailored solutions that combine functionality, style, and durability. Whether you require a custom-built kitchen, unique joinery pieces, or fully integrated fitted furniture, our manufacturing division ensures precision and quality at every stage. At Renova, we take pride in delivering a complete and hassle-free experience, managing every aspect of your project with professionalism and expertise. From initial consultation and design to construction and finishing touches, we are committed to bringing your vision to life with exceptional quality and service.
The loft converstion the guys did was brilliant. We are very happy with the outcome but more than that we were happy with the communication and the flexibility to work around our requirements. Nothing was too difficult the workers were always polite and clean. Couldn't recommend more.
Final touch has now known as GRD Design & Build Ltd is a reputable and dedicated home improvement company based in Southall, with five years of proven excellence in the industry. Our experienced team of four skilled professionals specializes in a variety of services, ensuring that every project is executed to the highest standards of quality and craftsmanship. Our Services: Painting and Wallpapering: Loft Conversion Flooring Roofing Plumbing Carpet& Lino Why Choose Us: Experienced Team: With five years of experience and a dedicated team of four professionals, we bring a wealth of knowledge and expertise to every project. Quality Craftsmanship Customer Satisfaction GRD DESIGN & build ltd , we believe in turning your vision into reality, enhancing your living spaces with professional and reliable services. Contact us today to discuss your next project and discover how we can add the final touch to your home.
Mandir from final touch was amazing. I highly recommend him and final touch. I called final touch for an urgent job and they came the following day. No complaints and very reasonable price. I had to lay carpet on stairs, passage and two other rooms with carpet which did not fit exactly plus a combination of old and new carpet. Manvir was able to do it no problem and made it look easy. Get in touch with Manvir for any jobs. Will definitely be using them again
TT Installations
Cellar & Basement Conversion
A small friendly company doing a small to big jobs from a single kitchen door to a complete refit and same for bathrooms a tap up to full refit Everything can be done from start to finish All trades so no need to get your own plumber or tiler or electrician we do the whole job to speed up install
General Builder 19yrs in the trade Highly skilled - standard to high end jobs
Good job and good knowledge of the issues at hand. Competitive on price. Good communication during and after job.
J R Griffiths roofing we specialise at 're roofing, slate tiles and leadwork. also chimney work undertook. Rubber roof and also grp
Reasonably priced, job completed the next day couldn't ask for anything more.
At Sergola Ltd since 2017 as business running and 2010 as a self employed We specialize in transforming houses into dream homes. From complete kitchen and bathroom renovations to innovative loft & extensions, our skilled team excels in bringing your vision to life. With a focus on quality materials and meticulous workmanship, we ensure that every project exceeds expectations.
hello I have 15 year in the trade I am a multi skilled tradesmen who takes pride in what I do I love my job I work on a basis you not happy with my work you don't pay simple as that I am fully insured and vetted
Top class service really friendly people ..love our flooring thank you very much we will use again.
Hi,my name is Wally my company is old oak building & landscaping we cover a very wide range of the building trade and work to a very high standard,and we always look to work with our clients to get the best finish we can for all thank u for looking
Wally and the boys were great, quick and easy and a great clean up job once they were done. Will definitely be getting more done by these guys
? I am 25 years professional Tiler is ? Most of the time, so I am doing ? ? refurbished, bathrooms ? I am like my job because I’m doing something new
Thomas is personable, helpful and quick.
Mihai
Cellar & Basement Conversion
Elevate Your Space with 20 Years of Expertise in Construction and Interior Design Are you looking to transform your home or business with impeccable craftsmanship and attention to detail? With over 20 years of experience in construction, specializing in interior design and carpentry, I bring a wealth of knowledge and expertise to every project. From tiling bathrooms and kitchens to installing flooring and crafting custom carpentry solutions, I take pride in delivering high-quality results tailored to your needs. Whether it’s a sleek, modern look or a warm, traditional style, I ensure every detail is meticulously executed. My commitment to excellence means that I hold myself to the highest standards of quality. Each project is approached with precision and care, ensuring durability, functionality, and aesthetic appeal. With my extensive experience, I guarantee solutions that not only meet but exceed your expectations. Let’s bring your vision to life. Contact me today to discuss how I can help make your space extraordinary!
TCL Building and Landscapes, friendly professional service.
Quick response and turn around
I'm a good worker and I love my job!! do not hesitate to contact me. offer seriousness and trust.
We are your trusted experts in comprehensive building & maintenance services, offering a wide range of solutions to meet all your needs. From minor repairs to large-scale projects, we’ve got you covered. Our skilled team specialise in all aspects of construction, including plumbing, boiler breakdowns, emergency call-outs, and gas safety/boiler services. We also excel in joinery work, handling both minor repairs and major construction projects, from kitchens to full house renovations, extensions property refurbs. In addition, we provide all aspects of plastering services, encompassing repairs, full-house projects, damp course works, external rendering, and k-render applications. Roofing is another of our specialties, with services ranging from repairs to complete house renovations. When it comes to electrical work, we take care of it all, from repairs and installations to full re-wires, EICR certificates, and remedial works. Our skilled painters and decorators, who are part of our dedicated team, ensure your space looks its best. We also offer EPC certificates and guarantee that all our work meets the necessary standards. For those looking to transform their homes completely, we offer full house renovations from start to finish. Landlords benefit from our fast turnaround times, ensuring their properties are ready for sale or back on the market promptly. All major works and extensions come with our comprehensive guarantee. Choose us for your maintenance needs, and experience quality service from start to finish. List of services Joinery Plumbing Expert painting and decorating Plastering all aspects Roofing works Electrical works Property maintenance Bathroom refurbishment Kitchen refurbishment Full property refurbishment Extensions and conversions Fire door checks sign off Minor or major repairs Planning and a full schedule of works with all quotes.
AD handyman Services we will undertake/consider any handyman jobs painting flatpack assembly,,shed assembly/removal, roof recovering, reseal of showers/baths/kitchens blinds/curtainso . Any decking and fencing requirements.... and many more internal and external jobs. All works carried out as efficiently and cost effective as possible without a reduction on quality.
Alex and his team were fantastic. The work was carried out to a high standard and was exactly what I wanted. Communication was great and everything was tidied up afterwards. I would highly recommend Alex and his team.
JN PRO BUILD LTD
Cellar & Basement Conversion
We are small independent building firm who work to extremely high standards, Over the many years we have undertaken 1000s of full building conversions, Inc bathrooms,kitchen, load bearing walls, studwork, first and second fix joinery, first and second fix plumbing. We our fully qualified and work to the very highest standards I
I'm a fully qualified builder & plasterer working on old and new properties. We specialise in Garage Conversions start to finish. New UPVC Conservatories. Single Extensions. Full Renovations. Building Alterations. All building work. All plastering work. - Artex ceilings covered. Plaster-boarding. Skimming. Patching. Building alterations. - Knock-throughs. Lintel installs. Stud walls. Repointing. Refurbishments. Conservatories. - Start to finish. Extensions. - Start to finish to current building regulations. No job too big or small. Always work in the cleanest safest way possible. Top quality assured. Fully insured/public liability. Free quotes and advice.
I hired Tom trading as Plaster Master to repair bedroom ceiling and board the loft and install loft ladder and replace the loft hatch. He gave an honest estimate for the work and the time line needed to complete the project which he did on time. I won't hesitate to use his services again.He was extremely reliable and professional arrived at the time he said and he tidied up at the end of each day’s work. I thoroughly recommend him! A job extremely well done.Definitely a 5 star review
Are you in search of a reliable and experienced building and landscape company? Look no further than LT Construction & Landscape Ltd! With over 20 years of experience, we have established ourselves as a professional, family-run business dedicated to providing top-notch services to our clients. From painting and decorating to new build extensions and garden services, we offer a wide range of construction and landscaping solutions to meet your needs. Whether you are looking to renovate your home or create a stunning outdoor space, we have got you covered. At LT Construction & Landscape Ltd, we take pride in our work and strive to exceed our clients' expectations. Our team of experts is committed to delivering high-quality results, ensuring that every project is completed to the highest standards. What sets us apart from other companies is our dedication to customer satisfaction. We understand that every project is unique, and we work closely with our clients to ensure that their vision comes to life. We prioritize open communication, transparency, and integrity in all our interactions, creating a seamless and stress-free experience for our clients. As a token of appreciation for choosing us, we promise to beat any quote you've had. This is our way of saying thank you for trusting us with your project. We are confident in the value we bring to our clients and are committed to providing affordable solutions without compromising on quality. So, if you're in need of reliable and professional construction and landscape services, look no further than LT Construction & Landscape Ltd. Contact us today for a free quote and let us help you bring your vision to life. #construction #landscape #building #renovations #freequote ????????
Contractors made arrangements to call, arrived on time, they seemed very nice & efficient; however we did not receive a quote as promised, when I queried it; he apologized saying he thought he had emailed me to say it would be late as he had broken his collarbone. Then I received a text saying he wasn't going to quote as he was off sick for 6 weeks, so unfortunately we are unable to rate his work...
Residential and commercial building contractor specialising in kitchens, bathrooms and full renovations. With over 12 years experience in the building industry our attention to detail is paramount.
Very quick, well priced and they did a great job. Thank you
"Here at AAR plastering & building services we have a wealth of knowledge throughout all the plastering and building sector, please get in touch for your free no obligation quotation today"
Bathroom ceiling painted, Alan did a great job with the best quality materials. He is very trustworthy and friendly. I would highly recommend and will be putting more work his way in the near future.
Rimi construction limited ! Guaranteed hight quality job with the best prices .
Very happy with Rimi. He at all times came up with ideas and solutions. We had a rear garden job. Involved brick work, decking, retiling, soil work,painting, creating new landscape overall. He did it professionally and in time. He was patient with delays in material supply and kept following up. Overall quite pleased with the end result
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