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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.
Dear Customer, We are a construction company with over 25 years experience. We undertake all aspects of building work, including new builds, extensions, lofts, total renovations, new bathroom and kitchens. All work guaranteed and certified for, GasSafe and NiCEiC approved on completion.
We got Kingston Surrey Construction in to undertake a full ensuite refurbishment after too many leaks and drips over the years. They provided a competitive quote and were available to undertake the work quickly to suit our needs. They worked at a steady pace with a focus on doing it right rather than doing it quickly. Their communication was good and they were as tidy as you can be with such a job. Overall we are very pleased with the outcome of the work, many thanks.
Hello we are FRPM Ltd a compete property maintenance company with over 20 years experience so if it’s a leaking tap to a complete property renovation we are here to help so please do not hesitate to call for your free quote Areas we cover Worcestershire Gloucestershire Warwickshire And the Cotswolds We have years of experience working with listed buildings and pride ourselves and our level of knowledge and expertise in this area We also cover light commercial premises for maintenance contracts and adhoc works We are fully insured
DO NOT USE THIS PLUMBER! Andy MacClay trading as FRPM was engaged to fit a bathroom for a lady in her 90's. Although personable, he did an appalling job and left the poor lady with raw sewage leaking and a dreadful smell. She was very distressed for months and it cost over £1800 to put the work right. He has since stopped answering his phone and does not respond to any communication.
I am builder I have been working from last 9 years in this building industry And trying to provide quality work to british standard I can do any kind of building job If you need my any help Feel free to contact me
Plumtree Home Improvements
Cellar & Basement Conversion
At Plumtree Home Improvements, we provide high-quality home improvements, driveways, and landscaping solutions to enhance both the look and functionality of your property. Whether you’re planning a home extension, an orangery, a new roof, windows, doors, or a stunning driveway, we have the expertise to bring your vision to life. Our services include: ? Home Extensions & Orangeries – Beautifully designed spaces that add value and style ? Roofing, Windows & Doors – Quality installations for durability and energy efficiency ? Driveways & Landscaping – Expertly installed resin, block paving, and imprinted concrete driveways, plus complete garden transformations ? Patios, Walls & Fencing – Creating stylish and practical outdoor spaces With over 15 years of experience, we take pride in delivering exceptional craftsmanship, attention to detail, and outstanding customer service. No matter the size of the project, we’re committed to quality from start to finish.
We are a family run Utility & reinstatement business that are based in the area of Coventry. We have been trading since 2016. We specialise in gas, water and electric service renewals to existing and new builds and also offer driveways, and drop kerb services. Also brickwork ,concrete pads . Garden make overs . All our workers are time served with correct credentials and experience. We hold the below accreditations 1. iso9001 2. Constructionline Gold 3. Acclaim 4. SSIP 5. LRQA GAS, WATER & ELECTRIC services & mains 6. Tarmac, backfill, bricklaying nvq
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.
So glad I chose Plaster Master for my garage conversion. I could not fault their work. Tom informed me of each stage of the work. I was asked to check each phase to ensure it was to my liking and I was. If you are thinking of having work done use this company as they are absolutely fantastic. I will use them again without blinking an eye.
ALEX AND SONS LANDSCAPING, BUILDING AND GARDENING SERVICES
Cellar & Basement Conversion
We are a reliable and successful company and we provide the quality and the qualification of the work and product which we are doing for you .Our motto is, my customer my boss. We coming for a long journey experience working of 20 years working experience in Spain,Italy, United kingdom and Romania of landscaping industry and inside and outside house design of isolation,consolidation, any work of tiles or painting. We coming with the real quote of the work we try to be in competition with the construction quotations and to make our clients to make our publicity for work and quotations
Alex visited me for a quote. One member of his team came on the same day and did the front garden quickly and efficiently.
Family business with over 30 years experience in home extensions and loft conversions, bathrooms, resin bound driveways and many more . All works are carried out by our professional team from start to finish. We undertake all aspects of extensions in the Kent and London area. No
I'm very pleased with the work the guys did. They were friendly, tidy and considerate. I definitely would use them again, good job guys :-)
We are a family run business, and although new to the Rated People website for 2024, we have gained over 25yrs of knowledge and experience in dealing with damp and mould in properties. Understanding the issues these cause, we know how to fix them while keeping within a reasonable budget. There are numerous ways these issues arise and we take our time to survey your property to find the cause, advise you on the cure, and help you to have a dry, healthy home. Contact us today to find how we can help you. We cover all of Merseyside and surrounding areas, and can survey your property for you, within a few days to a week. We are certified installers of the damp and remedial products we use and have completed the Pam Ties and Safeguard Damp proofing course, to give you the peace of mind that all our work is undertaken correctly and to the required accordance with British Standards using fluid, approved by the BBA and we adhere to the code of practice laid down by the British Standards Institute. We can undertake any instruction, from an independent damp, timber and mould survey which will be approved by your mortgage lender, right through to a full damp course, wall tie replacement, brickwork pointing, Mould sanitisation, timber replacement, basement tanking and also wall insulation. We have also experience in full property refurbishments and project management of large conversion projects and have numerous trusted tradesmen who have worked for us for decades. Should you require any other jobs doing, please just ask. Check out our excellent 5 star Google reviews to see that we care about our customers and make sure we turn up when we say, do what we quote, and leave your property in a clean tidy state. Call us today to fix your damp and mould problems!
4 months?Done the job feb, rang you march, you gave advice and we put 2 fans on the wall for a month and rang you back to say wall didn’t dry. I’ll post all the photos up of the job including the rusted beads and beads put over the top by your lazy plasterer and let’s remember I said cancel your plasterer when you didn’t do the job I thought you were doing and pay you just for what you done. The evidence is there for people to decide
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.
Brilliant. Efficient, hard working, friendly, professional, good vale and quality work. I'm very pleased and will use again.
NO UPFRONT PAYMENTS 0R DEPOSITS REQUIRED FREE QUOTATIONS. Luxury Spaces specializes in joinery, plumbing, and electrical services,l honed over 22 years to meet exceptionally high standards. Our commitment is to transparency and integrity in every project, collaborating closely with clients to achieve optimal results within their budget. We offer no-fuss financing options—simply reach out for guidance. Services' provided are as follows, Kitchen, bathrooms, bespoke staircase's, extensions, windows. As a family-operated business spanning generations, we take pride in passing down expertise from father to sons. Our dedication to excellence extends from military training—an artillery Gunner for five years—to every task we undertake. With honesty at our core, we consistently deliver value for money. Our clientele, diverse yet united in their desire for quality workmanship, inspire us to exceed expectations. To honor service professionals, Blue Light cardholders, and pensioners, we extend special discounts as a token of appreciation. For further details, visit our website: lux-spaces co,uk,About Us NO UPFRONT PAYMENTS OR DEPOSITS REQUIRED — FREE QUOTATIONS AVAILABLE Welcome to Luxury Spaces, where craftsmanship, precision, and integrity define every project we undertake. With over 22 years of experience in joinery, plumbing, and electrical services, we have built a reputation for delivering exceptional quality and timeless design. Our mission is simple — to create elegant, functional spaces tailored to your lifestyle. From concept to completion, we work closely with every client to ensure transparency, trust, and outstanding results within budget. We also offer flexible, hassle-free financing options to make your dream renovation a reality. --- Our Services Bespoke Kitchens Luxurious Bathrooms Custom Staircases Home Extensions Premium Windows & Joinery --- As a family-run business spanning generations, we take pride in blending traditional values with modern innovation. Our background in military training—as a former artillery gunner—instilled in us discipline, precision, and an unwavering commitment to excellence. At Luxury Spaces, honesty lies at our core. Every project is approached with meticulous attention to detail, ensuring true value for money and results that stand the test of time. --- Why Choose Us Our clients, diverse yet united by their appreciation for quality, inspire us to continually exceed expectations. We proudly off
Very quick , excellent job , good communication
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.
We are a local firm with over 50 years building experience, my son Gareth is a CICS Gold card Carpenter & my oldest son is a City & Guilds advance craft Bricklayer as am I. All of our staff are qualified in their respective trades. We build extensions, carry out house repair & maintenance work, patio and slabbing work, groundwork and excavations, General concreting work, drainage and much more. We fit new kitchens, stairs, doors and windows, all carpentry work undertaken. We have many passed clients who are happy for us to pass on their details as a reference for new clients to use.
Excellent communication and friendly team. On time, great work , on budget. No hesitation in recommending at all.
Next Level Construction
Cellar & Basement Conversion
Nextlvl Construction (London) We carry out renovations, extensions and building work across London and nearby areas. We’ve been trading for 7+ years. We focus on jobs being: properly planned kept tidy finished to spec done with clear pricing and communication What we do: Extensions & conversions: lofts, basements, garages Renovations: full refurbs, layout changes, structural work Kitchens & bathrooms: rip-out to finish, including plumbing and electrics Carpentry & joinery: fitted units, doors, stairs, custom work Roofing & exterior: flat roofs, fascias, soffits, cladding Finishing: plastering, tiling, flooring, painting and decorating Security & tech: CCTV, alarms, AV installs Cleaning: post-build and end of tenancy How we work Written quotes with a clear breakdown Realistic timelines and updates as the job progresses Site kept tidy and waste cleared Building regs considered from the start Snagging handled properly before sign-off If you’re planning work, we can take a look and provide a free quote. - Fully insured. - References available. - Before and after photos of recent work available on request. - We can work to drawings or help you plan the build. - We’re used to working in occupied homes.
Dedicated to our craft. We cover all aspects of building work including: - home extentions - renovations - conversions - plumbing and heating - kitchens - roofing - all general building work
Gary and his team are very professional and did an excellent job. Gary takes a great pride in his work and does all the preparation necessary to ensure a smooth and efficient job. Had extra work done re rendering, driveway and patio as their work was so good. Would recommend
We are a team of building professionals with over 10 years' experience in the construction and renovation of commercial and high end residential properties. We pride ourselves on ensuring customers are completely satisfied with not only the finished project but also the process. This means our customers are usually recommended to us by friends and existing clients. As a result, we have more and more customers returning to use our services. We value attention to detail and take pride in our ability to listen closely to our clients to deliver premium construction projects to your total satisfaction.
Petre and his team were exceptional. He was able to complete the entire job including plumbing, complex fitting of worktops and three sided breakfast bar, splashbacks and hardwire electric installation in just three days and to a brilliant standard. The company is super responsive to emails and nothing is too much trouble. They are great at problem solving and the finish is first rate. Polite, tidy, skilled, talented and efficient, he double checked every detail with me so we got what we wanted. Delighted.
Hi we been doing these jobs for last 20 years .what are the company does ! hard landscaping and soft Landscaping? brickwork paving and patios wooden and Concrete sheds ?fencing general tidy and drainage? And driveways?. Please give us a try you’re not going to be disappointed as you can see all my Your writing is five star thank you?
Shpend and his team did a great job for us. Really good value for money, and great quality of work. He was very professional and gave his expert advice when needed to help decide on best approach in resolving pre-existing issues. We would definitely use this company again.
Rose Projects
Cellar & Basement Conversion
A Construction Company based in South West London. Craftsmanship is our main focus ensuring every detail is finished to our high standards. Our Communication and Understanding are key. We are always on hand to help and assist you with any questions throughout the build. Our Projects are always built on time and budget. We are fully insured, All our tradesman are Qualified and References available upon request. Regards Rose Projects
Plum Building Services Ltd is a building company based in London. We work for both landlords and private home owners on new builds, extensions, refurbishments, repair and maintenance. No job is too big or too small. Quality is our guarantee.
Fully qualified carpenter/joiner for over 25 years. DBS checked. Full public liability insurance held.
Craig is the consumate professional - his work is excellent, he has a can do approach and he is always ready to give advice and guidance on how your ideas can be improved. Really enjoyed working with him and fully recommend him for all your carpentry, kitchen and building needs.
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