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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.
We are family run small construction business and proudly operating in South London for last 10 years. We specialize in a complete range of house renovation, refurbishment, maintenance and house extension services. We have an expert highly skilled team with extensive experience to achieve high standards on all of our projects. We work tirelessly to achieve the best results for our clients and have uncompromising commitment to customer satisfaction.
AVOID Adil is a smooth talker who hasn't got a clue about work in the industry. Employed to refurbish a full house. A SUMMARY of issues follows. 1 - Plastering done is uneven. 2 - Did not allow plaster to dry before painting walls so already peeling off. 3 - Found number of areas where holes had been left, and had these not been pointed out would have been left. 4 - Wood not sanded before painting, incl. new skirting boards. 5 - Threats when I refused to pay!
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I am an experienced builder providing a wide range of interior and exterior construction services. I specialise in all aspects of building work, including bricklaying, plastering, painting and decorating, paving, flooring, plumbing, and fencing. I also carry out complete projects such as driveways, kitchens, bathrooms, garage builds, extensions, and loft conversions. From small repairs to full renovations, I handle every job with care and attention to detail. I take pride in delivering high-quality, strong, and reliable work, ensuring every project is completed to a professional standard. I focus on good workmanship, safety, and customer satisfaction at all times. I am hardworking, trustworthy, and able to work independently or as part of a team. No job is too big or small, and I always aim to finish on time and within budget.
Very happy with the garden wall repair. Neat work. Good workers.
RENOVATE NORTH EAST LTD
Cellar & Basement Conversion
Hello we are Renovate North East and we are your local professional builder with a fantastic reputation for outstanding work at an affordable price. Our team is dedicated to making your job a reality.
Carpentry & Brickwork Specialists 18 years of qualified experience
Main task of laying wood was top class. Reasons for the mixed review: - As part of cost, was promised beading that would colour match the wood, but he turned up with different colour beading and it was left to me to varnish it - door needed to be trimmed because the wooden floor was at a raised height - was cut incorrectly. He promised to return and fix the door and lay a bridge to the carpeted hallway if I paid him in full which I did. Despite me following up, he never returned which I find dishonest.
RTP Building
Cellar & Basement Conversion
rtp building; Reliable, trustworthy, professionals. We are a small experienced team of multi skilled professionals with over 15 years experience. We are fully insured and offer a wide variety of services withing the building industry. Services provided 7 days a week with 24hr emergency contact available. We offer very competive quotes with no obligation. Would like to add we are new to this site as we would like to expand the company.
Expert, Reliable and Insured.
Done a very good job, and price was very reasonable.
“I am a versatile handyman with expertise in a wide range of home repairs, maintenance tasks, and gardening services. From fencing repairs, build,patio and paving to carpentry and painting, I bring a strong attention to detail and craftsmanship to every project. With my 5 years experience on private jobs,and all the customers been very happy about my services, i am pleased to introduce my self with confidence and enthusiasm! Additionally, I have experience in gardening, including landscaping, plant care, and garden maintenance. I am committed to delivering high-quality work that ensures both your home and outdoor spaces look their best.” I am new on this site,app, and I don’t have any reviews yet, but definitely they will come!
Grassby Construction LTD
Cellar & Basement Conversion
Providing strategic planning, design and building services for private construction projects to ensure timely & cost-effective completion. Specialisms include: extensions, new build, external works and hard landscaping.
House Extensions, Loft Conversions and Renovations Specialists
We have found drainage problems which the insurance company will not honour due to incorrect installation during this project. This has cost us dearly.
"We are a small family business based in Nottingham . We are friendly, transparent and very hard working. We have worked very hard to build a strong reputation with a majority of our business coming from referrals from happy clients.?In order to maintain our great name, we ensure that we pay attention to details every time for every project regardless of budget.?Book a FREE quotation today and we are confident that you will experience the best building project service delivery available."
Mon Roofing and Building Contractors have been going for near enough 20years. i started up as a roofing and building only buisnes but over the years grew to contracting projects ie extensions , annexes, new builds ext. i have an impressive portfolio and have not used the rated people platform since 2014 . but due to not going for the larger project have now come back on here to look for smaller contracts.
Arwel stood out from the other contractors who applied to do the job because he visited before quoting and made some additional recommendations. He replaced guttering, some loose root tiles and also recommended that we use some protective edging that he also installed. Roof looks great.
Stuart Marcus and Harry did a great job. They were professional,courteous and punctual. I have had bad experiences in the past, but the Landscape Construction certainly redressed any misgivings I might have had. They will be coming back to do another couple of jobs for me. Well done and I can highly reccomend them.
Busby Building Company
Cellar & Basement Conversion
With 20 years of expeirence delivering the highest quality in home improvement in Glasgow specialising in design and build extensions attic conversions garage conversions and new build homes.
Five Design and Build Ltd is a family run business covering West Sussex and Surrey. We specialise in modular extensions, warm roof conversions, refurbishments, extensions, orangeries, roofing, carpentry, and general building. We work closely with electricians, plasterers, decorators and any other trades necessary. We have over 15 years experience and pride ourselves on a high quality finish and great communication skills. Our aim is to provide you with a personal and professional experience during the completion of your project.
Problem quickly solved, will need to wait until it rains again to double check but confident I can call him back if any issues. Friendly and professional. Did a little extra job for me at no extra cost too.
North South Windows area home improvement company based in Cobham, Surrey. We specialise in the supply and installation of high quality windows and doors in timber, uPVC and aluminium. With over 15 years experience in the industry we pride ourselves on carrying out work of the highest quality. In addition, our team can provide a range of home improvement services from whole extensions to smaller tasks such as kitchen and bathroom renovation.
The guys were very helpful and extremely patient and left me with a perfectly working door.
CHRIS WOODWARD BUILDING SERVICES. WITH OVER 30 YEARS EXPERIENCE. ALL TYPES OF WORK UNDERTAKEN BRICKWORK, STONEWORK, PATIOS, PLASTERING, ROOFING, FENCING, GUTTERING ETC... CITY AND GUILDS APPROVED. LIABILITY INSURANCE. HONEST, RELIABLE & TRUSTWORTHY.
High quality work from a very friendly and knowledgeable tradesman. Very pleased with the finished job.
MIHALACHE CONSTRUCTION SERVICES LTD
Cellar & Basement Conversion
paving, slabs, gardens, excavations, electric Cleaning house………
MC Home Improvements
Cellar & Basement Conversion
We are a family run business that has been running for the last 25 years we specialise in new roof UPVC flat roofs, roof repair repairs, cladding, repointing painting roof cleaning driveway cleaning resin driveways and all other driveways
Civic Constructions and Developments Limited was formed by Mr. Wajid Ali in 1996. The Company has successfully operated on lot of domestic and commercial Building projects.We offer the finish quality site preparation, estimates, civil works and complete
Sadly as much as the extension looks fine on the outside, there have been too many issues behind the scenes that we have had to get remedied, which has been a huge additional ongoing cost to us. The team are not experts and will not do a thorough job. We have recently had to deal with a big health and safety electrical issue due to their inability to do things properly. We now wish we that we had engaged someone else.
Hey Bridge Home Improvements
Cellar & Basement Conversion
We are a friendly building service with 20 years experience in the building and construction industry . We specialise in extensions , loft conversions , garage conversions and much more . We have a very keen eye for detail and aim to deliver jobs in very good time and to the highest spec . All works undertaken will come with a full written works agreement and all completed works will come with a full written guarantee upon completion of works . All tradesman that work for HEYBRIDGE home improvements are all full qualified to NVQ level 3 in their respective fields . Thank you for reading and we look forward to hearing from you
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