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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
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 to transform your underground spaces into useable rooms. Find everything you need to know about hiring a local cellar conversion specialist. 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
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
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.
Other basement conversion FAQs
Do I need planning permission for a cellar conversion?
You generally do not need planning permission if you are converting an existing basement into a living space without changing the building's external appearance. However, you will likely need approval if you are excavating a brand-new cellar, creating a separate living unit, or working on a listed building.
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.
What questions should I ask before hiring a basement specialist?
Always ask if they carry public liability insurance, how many years of experience they have, and for a detailed cost breakdown and project timeline. You should also confirm if they use subcontractors, ensuring any gas engineers are Gas Safe registered and electricians are appropriately certified.
What is a sump pump, and do I need one?
A sump pump is a drainage system installed below the basement floor that automatically pumps out any groundwater that collects under the property before it can flood your room. Because cellars are naturally below the water table, a sump pump paired with a waterproofing cavity drain membrane is almost always required to ensure your conversion stays completely dry and structurally safe.
ABOUT US: At Safeway Build Ltd, we understand that your house is more than just bricks and mortar, it is your home. This is why we pride ourselves on delivering a reliable and personalised service to all our customers throughout the local area. Ever since opening our doors back in 2001, we’ve been committed to our clients’ unique project needs and achieving their utmost satisfaction with our work. More about our owner, Florin Nazare is a trained professional and has been a member of the FMB (Federation of Master Builders) since 2014. With someone who's worked in this industry for little over 20 years, you are certain to have a perfect end result to all of your projects. We offer an extensive range of services, all of which are carried out to the very highest standards of quality and safety. We offer free, no obligation quotations to assess your individual requirements and will always treat your home with the utmost care and respect. Building a relationship with our clients and their homes is what connects us more with the job in hand, which is why we are able to give you exactly what you wanted. Whether you are looking for loft conversions or extensions, all our services are carried out carefully, efficiently and to an exceptionally high standard of quality. We are happy to undertake any domestic work. At Safeway Build Ltd, no job is too big or too small. If your property is located out of our regions of operations, feel free to contact us as we may see to be able to work something out! WE OFFER THE FOLLOWING SERVICES: - New Builds - Extensions - Renovations - Loft Conversions - Alterations - General Building - Conversions - Refurbishments - Kitchens - Bathrooms - Carpentry - Tiling - Decorating - Plumbing - Electrical Work WE OPERATE IN THE FOLLOWING AREAS: SE London, SW London, S London, Sutton, Croydon, Beckenham, Sydenham, Dulwich, Bromley, Kent, and Surrey Areas
Florin fitted my new bathroom and kitchen . He was very polite, always punctual and reliable and completed the work to a high standard. I would use his services again and recommend him for installation of bathrooms and kitchens.
KL joinery services offering all types of joinery work
We were looking to change 7 internal doors and Kieran was first to reply , he came to see then he sent us the price for doors to buy and deliver and fully installed , when we accepted he came out on time and finished the job in one day and we are very happy with the work , thank you again Kieran .
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Over 30 years trade experience
Great work, came when he said he would and did a great job. thoroughly recommend.
Hi here at DC we aim to leave our customers 100% happy with the structure and manner of our work we strive to complete any task no job to big or small
Prompt and very reassuring as I was in a panic. Temp repair within a couple of hours which fully held the torrential rain out. Scaffold arrived next day and the roof fully repaired by the end of the day. They even cleaned my gutter while they were up there! Kept me fully informed throughout, with photos of what they had done, and has rung since to make sure everything is OK in the terrible weather. Would definitely recommend.
Danny General Builders specialises in structural work, extensions, refurbishing, loft conversions, roofing, fitting bathrooms and kitchens, and painting and decorating. All employees have more than 10 years experience and are insured.
Danny did an absolutely great job with my set of alcove shelves. He was friendly, diligent, extremely polite and did an excellent job. Highly recommend
⭐⭐⭐⭐⭐We are a family based company with years experience we thrive to be the best and trusted roofing and building company in London with or team haveing there training with some of the top schools in London you know for sure your getting the best at a reasonable cost every time with every project .⭐⭐⭐⭐⭐
MAC Plastering
Cellar & Basement Conversion
While we proudly offer a comprehensive range of services, we’re particularly renowned for our expertise in two key areas: roofing and external rendering. Whether you require a new roof installation, expert repairs, or a beautifully rendered exterior to enhance your property’s aesthetics and protect it from the elements, Mac Construction has the skills and resources to deliver outstanding work. Our meticulous approach ensures durable, long-lasting results that stand the test of time. Beyond our specialities, we're also equipped to handle a wide spectrum of general building projects. From minor repairs to full renovations, our team’s versatility means we can seamlessly integrate these projects into your overall vision. We act as reliable and experienced contractors, managing the project efficiently and ensuring that it meets your specific needs and expectations. Time-Served Tradesmen: Our team brings years of experience and expertise to every project, guaranteeing high-quality workmanship. Comprehensive Services: From routine repairs to ambitious extensions, we have the skills to deliver on a wide variety of building projects. Specialized Expertise: Focused skills in roofing and external rendering mean we can offer exceptional, detailed results in these critical areas. Trusted Contractors: For larger projects, we act as your reliable construction partner, ensuring a smooth and successful build. Commitment to Quality: We are dedicated to achieving the highest standards in every project we undertake.
AJD Builders
Cellar & Basement Conversion
I've around 15 years experience having established my business 10years ago. Customer satisfaction is very important to me and excellent customer service is at the heart of my business.
Over 20 years' experience High standards of workmanship Fully qualified team of builders and joiners Associated with the Apprenticeship scheme of the Construction Industry Training Board Competitive pricing Free, no obligation quotation
Beautiful carpentry work , attention to detail is amazing, hes gone the extra mile to help us transform our home. Would recommend for all joinery work doors ,door frames, bannister, skirting, loft hatch, flooring and plastering. Very good price also. Very approachable with better ideas. Have recommended Tom to everyone I know!.
collins and sons
Cellar & Basement Conversion
High Level Carpentry & Joinery LTD
Cellar & Basement Conversion
I’ve been trading over 10 years cover all aspect of carpentry and building works I’ve got An amazing friendly team that cover all aspect from the footing all the way to final day of sign off .
John worked extremely hard to fulfil our brief & also had great vision when considering possibilities. He understood our needs and ensured all snagging was carried out before completion. All builders are currently pushed to the limit with supplies and staffing - John managed this to the best of his ability and was always polite, helpful and friendly.
Aubrey Construction & Maintenance
Cellar & Basement Conversion
We are a small family run business, established in 1989 in honour of our late mother, Audrey. With decades of experience, we take pride in delivering high-quality workmanship in all types of construction work; new builds, refurbishment, extensions, garage & loft conversions, patio/driveway cleaning & repointing. Every project treated with care and professionalism no matter the size.
RDG Home Extensions & Roofing Services
Cellar & Basement Conversion
Professional home extensions and roofing services across Surrey, London and the Home Counties. With over 30 years' experience, we specialise in single & double storey extensions, loft conversions, car ports, garages and garden rooms. Our roofing services include design and build of all roof types, fascias, soffits, guttering, repairs, cleaning and chimney maintenance.
Work is always completed to the clients specifications. Please ask for any information you’d like.
Daniel was on time, polite and completed painting the front of our house within a tight timeframe! I understand his company also provides other general home improvement services which we will explore in the future. Definitely recommend. Really love the new colour!
Hi I am based in north London and offer a wide range of services, from groundworks ie: foundations, pouring concrete, drainage, steel erection, to complete extensions, also all Demolition work, roofing work, patio and driveway work undertaken, I have never advertised for work in 37 years in london, always went straight from one job to another,but this past year has been hard, so please look at my profile pictures and contact me regarding any work big or small, I have thousands of photos going back years of work done, ps underpinning aswell, thank you pat.
Patrick did a great job in brickwork (opening our kitchen window aperture), pointing and skimming. He went along our tight schedule and provided helpful advice and a fair price. I strongly commend his work. Thank you Pat!
We are a small team covering many aspects of construction from new builds and extensions to groundworks and renovations. A tradesman's project is also a customers well spent dream so whether it be a large intricate project or a simple garden wall we aim to give our customers satisfaction and confidence right through to a top quality finish.
Craig & Ergest resurfaced my drive and garage floor ahead of doing my Workshop conversion. Found them to be reliable and professional in their work - pleased with the outcome
CBS
Cellar & Basement Conversion
At Chiossone Building Services we provide a wide range of services within the construction industry. With 7+ years in the building industry, CBS have the skills required to provide a stress free high standard of work. From completely renovating your garden/home, to making a simple change within your household, we will approach the job professionally and strive to make you happy with the end result. Thank you for taking the time to read my profile, looking forward to building my profile and reputation! Please check my social media pages for the most up to date photos of my projects. Marco Chiossone
Testing for Marketing Emails
Cellar & Basement Conversion
Give a brief description of your company and services. A short sales pitch will go a long way in grabbing homeowner attention and securing new work. Talk about your: Years of experience Specialities Education and training
Hear at all seasons gardening and newbuilds we are best known for making your dreams. We are a family run business with competitive prices and outstanding workmanship
Excellent very pleased with the job and price. Many thanks
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