Find local basement conversion specialist near me
Over 10,000 rated tradespeople
are ready to help you get your job done
Over 3 million happy homeowners
have found a quality tradesperson
Over 1 million ratings
with 88,000 5* ratings in the last 12 months
Join our group of happy customers
Thousands of 5 star reviews
Read real reviews from customers about their service experiences.
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.
'%3e%3cpath%20fill-rule='evenodd'%20clip-rule='evenodd'%20d='M12.5%2020.392a1%201%200%2001-.54.888l-5.274%202.73a1%201%200%2001-1.435-1.109l1.494-6.588a1%201%200%2000-.306-.964l-4.723-4.254c-.65-.586-.287-1.666.585-1.74l6.105-.514a1%201%200%2000.846-.629L12.5%200v20.392z'%20fill='%23F7DB34'%20/%3e%3c/g%3e%3c/svg%3e){kind=small}
Over 20 years experienced,always professional and serious,ensuring it meets quality standards and is completed on time and within budget.
I really highly recommend Paul, he was professional, worked quickly, and cared about doing a good job. He put up a new stud wall for us, and also completed a load of joinery work (installing panelling, built-in bunk bed, desk and window seat) and it was a pleasure to work with him. We'll be back!
Kitchen fitting Bathroom fitting
Robert understood what I was trying to build but the best part is that he comes with a lot of creative ideas. The library was build well and I am locking him done for future jobs. He does not rush the work rather giving detail to every inch. Thank you so much
We specialise in transforming underused garages into beautiful, fully functional living spaces that add comfort, value, and practicality to your home. Whether you’re looking for a home office, extra bedroom, gym, playroom, or modern living area, our expert team delivers outstanding results tailored to your lifestyle. From initial design through to final completion, we provide a seamless, stress-free service built on quality craftsmanship, attention to detail, and clear communication at every stage. Our goal is simple — to maximise your space while maintaining the highest standards of workmanship. We pride ourselves on delivering exceptional garage conversions at highly competitive prices, ensuring homeowners receive premium results without premium costs. With reliable timelines, professional service, and customer satisfaction at the heart of everything we do, we turn unused garages into spaces you’ll truly love living in. We specialise in designing and building high-quality garden rooms that create stylish, practical extra space for modern living. Whether you need a home office, gym, studio, or relaxing retreat, our bespoke garden rooms are built to the highest standards using premium materials and expert craftsmanship. From concept to completion, we deliver a smooth, hassle-free service focused on quality, durability, and attention to detail. Our aim is to provide beautiful, fully insulated spaces you can enjoy all year round — without the cost or disruption of a traditional extension. We also pride ourselves on delivering outstanding results at highly competitive prices, helping homeowners maximize their space with a garden room tailored perfectly to their needs at very competitive prices Business name N.Levett Builders Building Contractor
Neale has transformed our dilapidated garage into a watertight, aesthetically pleasing and usable outbuilding. He was great with contact and a very friendly trader. Quoted for additional work and tidied up afterwards. Very pleased. Would highly recommend.
LONDON STARS CONSTRUCTION LTD
Cellar & Basement Conversion
London stars we are specialists in extensions, loft conversions and new builds, with full design package. Kitchen and bathroom redesign. Carpentry including flooring and door hanging. Plastering and rendering including specialist finishes. Glazing, conservatories and lantern roofs
DMP Building
Cellar & Basement Conversion
We are company run building over 6 years of experience enhancing homes off all types. We are highly versatile, and have the expertise and equipment to undertake any builder work to mach your vosion. We work hard to provide results that are nothing but the best for our respected costumers and we ensure to deliver a flawless finish and complect project on time. Thanks so much for considering our bid, and please contact us more about your project.
Ziyad Construction with over 15 years of experience in the Construction industry, We carry out all aspects of Domestic/Commercial building works to the highest standards. Services include plumbing, carpentry, brickwork, loft conversions, extensions, house renovations, painting/decorating, plastering and all other general building works.
Pump installation for a lack luster shower. Sorted well. Now have a powerful shower. Thankyou.
Ignite Developers has successfully developed and completed hundreds of residential and commercial projects in prime London locations for the last 10 years. With vast professional project management and contracting experience of developing our own projects that have added substantial value to our own property portfolio; we have grown to offer this service to private clients. We offer a complete in-house design and build service with a high level approach and focus on high end quality and handing over projects on time, every time. We project manage all projects so your requested task is hassle free each and every time. We cover a range of different trades including electrics and gas in addition to decorating, carpentry and extensions and loft conversions and much more.
Fantastic works done by the team who transformed our garden shed into a fully fitted out home office. Great communication with Nadeem throughout. Quick and efficient.
DANIEL JAMES SOLUTIONS
Cellar & Basement Conversion
We have been trading for 18 years and specialize in painting, decorating, building work, full-scale refurbishment, bespoke wardrobes, kitchen installations, and high-end bathroom refurbishments.
fantastic work from very nice professional team - will employ again
AJ PROPERTY MAINTENANCE
Cellar & Basement Conversion
AJ Property Maintenance boasts a collective experience of over 15 years, specialising in a comprehensive range of services including plastering, flooring, tiling, remodelling, painting, addressing leaks, laminating, and proficiently handling all electrical work. The team's diverse expertise ensures quality and reliability across various facets of construction and maintenance.
J K - Contractors Ltd
Cellar & Basement Conversion
Marche Construction LTD
Cellar & Basement Conversion
Father and Son company, after 35 years living and owning a construction company in Italy we have moved here in Manchester to get bigger opportunities. We do Extension, Tiles, plastering and fencing. Working on all the aspect of constructions. Here to be unique in our work
Anthony Flude Refurbishments
Cellar & Basement Conversion
Company has been established for 25+ years . Fully insured . Small freindly team.
We're a friendly, approachable family run damp proofing company providing Bolton, Manchester and much of the northwest with a professional, honest, no nonsense service. We are the North West's trusted damp proofing and condensation experts.
Great job, fantastic tradesman. Thank you so much.
Proud main contractor for fords car dealership across the uk also main contractors for many big property management companies. No job is too big or too small for our team to undertake, just give us a call to talk about your requirements and will get working on a competitive quotation for you to ensure your ideas become a reality for your home and your family. At authentic all of our work is fully guaranteed, we carry public liability insurance of £5m and we do not need a deposit, however we do require interim payments on larger jobs, speak to a member of our friendly team for more information. We use only the best quality building materials to get the job done professionally and efficiently every time and to your budget.
Grigo Build is a specialist building, extension and refurbishment company with over 13 years experience, working on projects of all sizes from initial consultation through to full project delivery. Working closely with our clients we are able to provide a fast, friendly and reliable service with a high quality finish at very competitive prices with an insurance backed guarantee. Based in Hendon NW London, we cover all areas in and around the M25. Our experienced team provides full construction, plumbing and electrical services and pride ourselves on client satisfaction. Please call to discuss your requirement - big or small!
Amazing builder! Super reliable, I’m happy with them all the way through. High quality standard, and super fast work. Whatever you want, they will listen and make it with no fuss. Recommend to anyone who needs to renovate a bathroom or do any tiling job. Can’t wait to have you guys here again to do more renovation. Thank you!!
Hollywood joinery is a friendly company that specialises in cabinets an fitted wardrobes an all other joinery have been in the building trade for over twenty years an have experience in many other aspects of the building trade
Perfect job. Quickly done, great communications, reasonable price. Highly recommend.
JH Roofing & Building
Cellar & Basement Conversion
JH roofing is a family run business with Taylor tradesmen to meet your needs we do a way of conservatory changeovers we also damp proofing and all aspects of property maintenance for a free no obligation quote dont hesitate to get in touch. Thank you for looking.
It was a relief to have a builder who doesn't take on other jobs at the same time. Mark and Gaz gave a reasonable timeframe and price and stuck to it. We had recently bought the property and ended up asking for considerably more work to be done than was first advertised. This is largely testament to the fact that we had built a trusting relationship with Mark and had peace of mind that the job would get done well and for the price quoted. Yes his banter was terrible at times but you can't have it all!
No job is too small By choosing our company you choose professional service and fast realization time. We are local Edinburgh based with over 10 years of experience. We love what we do and we are proud of providing excellent service. Our clients are number 1 in customer satisfaction. We always ensure high quality finish which meets your requirements.
'%20rx='20'%20/%3e%3cg%20fill='%23FFF'%3e%3cpath%20d='M29.376%2016.914c-.555%200-1.006.454-1.006%201.013v37.416c0%20.578.472%201.014%201.097%201.014h34.109a1.007%201.007%200%200%200%20.972-.83%201.012%201.012%200%200%200-.161-.76l-6.446-9.416c-.375-.548-.567-1.085-.586-1.642-.034-.977.516-1.952%201.402-2.483%204.8-2.878%205.808-7.575%205.808-11.009%200-7.335-5.925-13.303-13.207-13.303H29.376ZM63.594%2059.75H29.467c-2.505%200-4.467-1.936-4.467-4.408V17.927c0-2.43%201.963-4.408%204.376-4.408h21.982c9.14%200%2016.577%207.49%2016.577%2016.698%200%205.879-2.46%2010.687-6.944%2013.607l6.17%209.017c1.37%202.002.868%204.752-1.12%206.132a4.336%204.336%200%200%201-2.44.778h-.007Z'%20/%3e%3cpath%20d='M38.767%2027.797c0-.749.603-1.357%201.347-1.357h6.427c3.979%200%206.426%201.72%206.426%205.099v.123c0%203.132-2.325%205.098-6.365%205.098h-3.848l-3.985%203.998V36.76h-.002v-8.963'%20/%3e%3c/g%3e%3cpath%20fill='%23FFF'%20fill-rule='nonzero'%20d='M18.176%2069.2h2.156v3.878h3.976V69.2h2.156V79h-2.156v-3.934h-3.976V79h-2.156v-9.8Zm16.428%207.98c.43%200%20.826-.08%201.19-.238a2.72%202.72%200%200%200%20.931-.658c.257-.28.457-.604.602-.973a3.21%203.21%200%200%200%20.217-1.183V74.1c0-.42-.072-.817-.217-1.19-.145-.373-.35-.7-.616-.98a2.96%202.96%200%200%200-.945-.665%202.873%202.873%200%200%200-1.19-.245c-.439%200-.838.08-1.197.238-.36.159-.667.378-.924.658s-.457.604-.602.973a3.21%203.21%200%200%200-.217%201.183v.028c0%20.42.072.817.217%201.19a2.959%202.959%200%200%200%201.554%201.645c.36.163.758.245%201.197.245Zm-.028%201.988a5.343%205.343%200%200%201-2.086-.399%205.187%205.187%200%200%201-1.645-1.078%204.823%204.823%200%200%201-1.078-1.596%205.029%205.029%200%200%201-.385-1.967V74.1c0-.7.13-1.356.392-1.967a5.075%205.075%200%200%201%201.085-1.61%205.05%205.05%200%200%201%201.652-1.092%205.395%205.395%200%200%201%202.093-.399c.756%200%201.451.133%202.086.399a5.187%205.187%200%200%201%201.645%201.078c.462.453.821.985%201.078%201.596.257.611.385%201.267.385%201.967v.028c0%20.7-.13%201.356-.392%201.967a5.075%205.075%200%200%201-1.085%201.61%205.05%205.05%200%200%201-1.652%201.092%205.395%205.395%200%200%201-2.093.399Zm8.14-9.968h2.324l2.576%204.144%202.576-4.144h2.324V79h-2.142v-6.398l-2.758%204.186h-.056l-2.73-4.144V79h-2.114v-9.8Zm13.152%200h7.392v1.918h-5.25v1.988h4.62v1.918h-4.62v2.058h5.32V79h-7.462v-9.8Zm13.866%209.94a6.49%206.49%200%200%201-2.198-.385%205.817%205.817%200%200%201-1.96-1.183l1.274-1.526c.448.364.908.653%201.379.868.471.215.987.322%201.547.322.448%200%20.796-.082%201.043-.245a.771.771%200%200%200%20.371-.679v-.028a.85.85%200%200%200-.077-.371.778.778%200%200%200-.294-.301%203.079%203.079%200%200%200-.602-.28c-.257-.093-.59-.191-1.001-.294a12.201%2012.201%200%200%201-1.344-.406%203.787%203.787%200%200%201-1.022-.553%202.237%202.237%200%200%201-.651-.819c-.154-.327-.231-.733-.231-1.218v-.028c0-.448.084-.852.252-1.211.168-.36.404-.67.707-.931a3.183%203.183%200%200%201%201.085-.602c.42-.14.882-.21%201.386-.21a5.86%205.86%200%200%201%201.981.322%205.743%205.743%200%200%201%201.659.924l-1.12%201.624a7.1%207.1%200%200%200-1.288-.707%203.292%203.292%200%200%200-1.26-.259c-.42%200-.735.082-.945.245-.21.163-.315.366-.315.609v.028c0%20.159.03.296.091.413.06.117.17.222.329.315s.376.182.651.266c.275.084.623.182%201.043.294.495.13.936.278%201.323.441.387.163.714.36.98.588.266.229.467.497.602.805.135.308.203.677.203%201.106v.028c0%20.485-.089.917-.266%201.295a2.66%202.66%200%200%201-.742.952%203.353%203.353%200%200%201-1.134.588%204.924%204.924%200%200%201-1.456.203Z'%20/%3e%3c/g%3e%3c/svg%3e)
Get our app for homeowners
- Send messages and get notifications from tradespeople
- Add photos to get more accurate quotes
- View tradespeople's profiles