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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.
Profesional service.. To many years to mention in business. And all work carried out 100% satisfaction guaranteed.
Excellent work and service, would certainly use again. Bill Walker
Quick reliable and clean service as a standard All aspects of painting decorating jobs undertaken Paint spraying , wallpapering , windows refurbishment and plastering. Dustless sanding system friendly for customer and tradesmen.
Serious and hard working. Since 1998 in EU and from 2010 in UK . "Work smart not hard" .
Excellent work and to very high standard . Would be very happy to use him again.
AT TRIDENT DAMP,we have thirty years experience can give up to 25 year insurance backed guarantees and are approved Triton system contractors,we are also accredited by which trusted traders,checkatrade and mybuilder and have over 200 reviews of our works.
Very quick turnaround and good price
All Trades have a policy, TREAT PEOPLE THE WAY WE EXPECT TO BE TREATED, we will always be available 24/7 to assist any issues, we take things personal and thrive to achieve best results, from supplying a joiner or plumber to full renovations we have proven evidence and testimonial if required.
Pleased with the repair to my granite garden wall. Was happy with the standard of workmanshop and with the price which was fair for the work done. They also underook further small repairs whilst on site which I appreciated. I would recommend All Trades for this type of work.
Quinn construction Ltd general building works, specialize in Knockthrough, garage conversions and chimney breast and stack removal
Highly recommend Ben for plumbing and rendering work! He did a fantastic job — everything was completed to a high standard, on time, and within budget. Very honest, easy to communicate with, and offered practical solutions without upselling. His pricing was fair and transparent, and the quality of work speaks for itself. It’s rare to find someone so reliable and skilled these days — will definitely be using him again!
Hi I have been in the building trade for over 25 years I have run my own business for 15 years I am very honest and totally reliable as my rating will prove .
The gentleman that came worked really hard to get it finished. He made a good job of it despite the poor instructors. So grateful for what he did.
All aspects of Plastering undertaken including: Skimming, Over-skimming, Float & Set, Boarding, Partitioning Walls, Rendering (sand & Cement) silicon Renders & Screeding. Contact Us for more information.
Tom is excellent. He is talented, honest and determined to give his clients the best. Tom adjusted the soundproofing job to give us exactly what suited our needs. He also did a great job plastering and insulating. our garage, which had been leaking heat for years. I’d certainly use Tom again.
Goldsmith's building services for reliable tradesmen , professionalism and quality workmanship.
Phillip arrived when he said he would and got the jobs done in a great time. Polite and friendly and did a great job, I would recommend him and will use him again
UK specialist Property Services - High End Painting & Decorating/Plaster skim + Wetroom leak repairs - tiling/sealant/grouting + Damp Survey/Remediation, . Organic products cleaning services available - Gallery open in Chrome click on Photo's view L to R
Andrew is a nice guy and does quality work, but for kitchen tiling I am afraid to say is very slow; approx 4 tiles per hour (100x200mm) or 0.8 sq m a day (10 hours). I personally (a diy'er) can do 15 tiles an hour - i.e. 4 times faster. £250 at day is expensive. (My electrician is £175 a day) I ended up capping the job at £600 and decided to complete tiling and grouting myself after 3 days. I would not have hired Andrew if I knew he was this slow and as a result expensive.
Hi my name is John from John Alan, we are relatively new to rated people and look forward to offering our professional services. Our services include everything from handyman services to bathroom installations, heating and plumbing. Rest assured when you choose John Alan we provide a fast, clean and efficient service with competitive rates. We look forward to working with you. Public liability insured Gas safe registered
Loved this extremely professional team. I will hire them again in the future. Thorough, knowledgeable and affordable.
Scotland's premier building joinery landscaping and tree surgery service we offer a wide range of services carried out by fully trained fully insured professional trades people full free written details provided 21 day cooling off period all work guaranteed insurance work undertaken sepa registered waste carriers no call out charge agents throughout Scotland we cover all of Scotland distance no object established 2008 hundreds of satisfied customers throughout Scotland no job to small
Alex and the team were quick, efficient and removed all rubbish accumulated. Would recommend and would hire them again.
If you are thinking of extending, converting, or in any way structurally altering your home, we can assist you with any or every stage of your project.
Paul did an excellent job of removing the old storm porch that was attached to my front door. Everything removed, rubble taken away, great chat & well priced. I wouldn't hesitate to recommend Paul to anyone looking to get some demolition work done! Thanks Paul!
My company can offer all aspects of home improvements and all aspects of roofing with a full guarantee with all woks carried out I have 15 years of experience in the trade With many happy customers and our company is fully insured so rest assured
Dwain and his team did a really good job. They responded to the job post and came to do the work quickly as I needed the work doing quite urgently. They did everything I asked, and got it just right. Friendly service with a smile. Would recommend.
Certainly! Here's a more polished company description for CB Building and Plastering: CB Building and Plastering With over 40 years of experience, CB Building and Plastering is a trusted name in the building and plastering industry. Serving Barnsley and the surrounding areas, we pride ourselves on delivering high-quality workmanship and exceptional customer service. Our Services: Building Plastering Why Choose Us: Extensive experience spanning over four decades Fully insured for your peace of mind Public liability insurance up to £5 million, ensuring comprehensive protection At CB Building and Plastering, we are dedicated to meeting and exceeding your expectations. Contact us today for reliable and professional building and plastering services.
He did not resolve the issue and left a mess of the decking
We are specialised in Kitchen, bathrooms and all type of furniture instalation. We are team of handyman, plumer, electrician and carpenter.
Excellent Kitchen Tiling! Peter did an amazing job! Professional, friendly, and efficient, he completed the work quickly. The pricing was fair, and he kept everything clean throughout. Highly recommend for quality tiling!
Window, door and building specialist. Our ratings and feedback speak for themselves. Over 13 years on this site and over 35 years of experience in the field.
What can i say about Marc? We hired him for one job and he ended up doing our entire home renovation. I cant recommend him enough. He’s a rare find, trustworthy, an hard clean worker and a lovely guy. Feel free to contact me for any questions on his work.
We are a small, family run company based in the Midlands with more than 25 years experience in concrete reinforced structures and groundworks. We specialise in raft slab foundations; reinforced bases for summerhouses, sheds and garages; concrete retaining walls; footing foundations and all associated groundworks. We pride ourselves in delivering high quality workmanship at a fair price. "We form a firm foundation for you to create your vision"
Craig was very responsive, knowledgeable and competitively priced when he came to quote. The work carried out is great, Craig and Connor worked tirelessly to finish in 30+C heat, and the results are better than what I had planned in my head.
Located in Glasgow, we are a small, yet well-established, family-run business with over 15 years of experience in building and home maintenance. Our commitment to detail, service quality, reliability, and value for money sets us apart. We have earned an excellent reputation through word-of-mouth recommendations, thanks to our consistently high standards of work. Here's why you should consider choosing us: 1. Exceptional Workmanship: Our team takes pride in delivering work of the highest quality, ensuring every project meets or exceeds your expectations. 2. Comprehensive Guarantee: We stand behind our work and provide a comprehensive guarantee to give you peace of mind. 3. Diverse Trades: Our expertise covers various trades, allowing us to handle all aspects of your building and maintenance needs. 4. Competitive Pricing: We offer competitive prices without compromising the quality of our service, ensuring you get the best value for your investment. 5. Free, No-Obligation Quote: Contact us today to receive a free quote, with no obligation attached. At The Guy of all Trades LTD, we are dedicated to providing exceptional services. We look forward to the opportunity to work with you and meet your building and maintenance requirements. Contact us today to get started !
Great job, thorough efficient and clean. Would be happy to book again for another job
CH constServices takes great pride in the work we do and the competitive prices we offer. We are always aiming to make sure our customers are satisfied and that they return to us. We are fully guaranteed on any job we do and willing to work any size job.
Very pleased with the finished results of our flat renovation.
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