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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.
Fantastic job etc
Damian Adam Drewiecki
Cellar & Basement Conversion
Hi I am Damian, BSc (Hons) Dip Arch RIBA, director and founder of ABOX. We do specialise in rear extensions, loft conversions and new build for small scale developers and private clientele. We have succeeded in delivering numerous residential projects in 2020 and are continuously improving on delivering high-quality workmanship.
Rated People
Cellar & Basement Conversion
We are a family run business with over 30 years experience. We pride ourselves on word of mouth and recommendations. We cover all building works specialising in internal renovations. From one room to whole house re-modelling.
Excellent, really nice team, great work too. Really tidy and kept me informed. Would recommend.
Cheshire Sales
Cellar & Basement Conversion
A full service firm. We are able to tailor our offering to suit your demands from full service project management to small scale one off projects
Although a small scale job, Patrick was quick to respond to my post and very kindly talked me through a few options, which was very useful and much appreciated. Great that he was able to carry out the work so soon even with my tight timeline. Very satisfied with the result and price within my budget. Thank you, Patrick!
My name is Karol, I'm your local builder. Specialist works � All masonry aspects of every build � Design & build of your project � Approved contractor, have every trade so a one stop shop for entire project We have customer testimonies, references, physical locations you can visit and a lot of reviews combined with Google - KJC Bricklaying So whether you\\\\'re looking for a small repair job or want to build your extension, I can help.
I would definitely recommend! Really hard working, genuine people with a very fair quote. Brilliant communication throughout. Couldn't fault anything they did and the finished room is brilliant. I will be using them again without a doubt and recommending them to anyone having work done. Even the neighbours commented about how dedicated and committed they were. 10/10 from us!
Anthony Flude Refurbishments
Cellar & Basement Conversion
Company has been established for 25+ years . Fully insured . Small freindly team.
GS Solutions
Cellar & Basement Conversion
GS Solutions – Painting, Decorating & Complete Construction Services At GS Solutions, we specialize in professional painting and decorating services that transform spaces with precision, creativity, and care. From residential homes to commercial properties, our expert team delivers flawless finishes that bring style and durability to every project. While painting and decorating are at the heart of what we do, GS Solutions offers a complete range of construction and property services. From renovations and refurbishments to general building, maintenance, and finishing work, we provide reliable solutions tailored to each client’s needs. Also approved and vetted by Trustatrader With a reputation built on quality, reliability, and attention to detail, GS Solutions is your one-stop partner for creating, improving, and maintaining spaces that inspire.
Hi everyone , thanks checking my profile I’m Vas , have more than 10 years experience in construction I got level 3 diploma in carpentry, my main job is carpentry, but being in the industry so long I also can do handyman, fencing, ground work and foundation, decking, etc j
Brilliant workmanship , did exactly how we needed the shelves to be made. Highly recommended
With over 20 years experience in all building aspects. We cover everything from the small tedious jobs to large extensions and builds. Family oriented company with great understanding to what customers needs are. Plymouth and surrounding areas covered.
Very pleased with APEX, doing a great job, near to completion, very glad I brought them here to sort my unfinished kitchen and bathroom extension. Family business, I can't recommend them enough. They've taken on my ideas, and carried them out great, I certainly would recommend them to everyone.
Over 30 years of experience as a multi-tradesman. As well as being a qualified plumber I specialise in other wet trades e.g Decorating, Plastering & Rendering, Tiling & Bricklaying. Also, I fit laminate flooring, skirtings, architraves and timber stud work. I am always punctual and reliable, and clean and tidy in my work. I am also happy to assist in planning and designing projects.
Kevin arrived on time, did an amazing job on my mother’s bungalow, cleaned up afterwards. Polite, friendly and professional. Good price too.
Quality,reliable, friendly local General builder. No job too big or small. Happy to travel. Free quotes. Twenty years experience. All types of work undertaken.Bathrooms/showers.Decking. Garage conversions/.extensions. Stud partition work.References.
Mark was great. Hardworking. High quality. Friendly.
East Coast Construction
Cellar & Basement Conversion
General building company operating since 2007 covering the whole of the North East. Specialising in structural alterations and renovation
HANDY HOME REFURBISHMENTS SPECIALIST
Cellar & Basement Conversion
Handyhome Refurbishment Specialist are your number one choice in East Sussex for all your refurbishment and building needs. We take you through every step of your project from start to finish. Providing a professional service across Eastbourne, Hastings, Brighton, Bexhill and surrounding areas. Fully Insured Proud members of my builder and rated people
We are an Electrical Installation company working across the North West. As a NAPIT registered approved installer, compliant with 18th Edition Wiring and Building Regulations we carry out all domestic electrical work such as rewires, new consumer units and new lighting/power circuits along with fault diagnosis and repair. As SMART Home Automation and security specialists, our work includes, Alarms, CCTV, Motion Sensor Lighting, SMART Thermostats, SMART Lighting, TV, Audio and Visual, Media Walls and Home or Business Networks. • EICR • Fault finding • Rewires • New circuits • Consumer Units • CCTV and Security Systems • Audio and Visual • Home or Business Networks • Media Walls • SMART Home automation • Home Improvement and Renovation projects Having over 25 years experience in the Electrical, Communications and Property Development sectors we pride ourselves on our commitment to providing quality service to each and every customer. Whatever the project we will provide a full and complete service from concept to completion, ensuring our customers are left with products and services that they are completely satisfied with. We operate in and around the Greater Manchester area and are based in Bolton. We are a family ran business and have a lot or repeat customers that are fully satisfied and assured with our quality workmanship. We will only use quality equipment and materials as we believe if a job needs doing, then it needs doing correctly. Give us a call or drop us an email to discuss your project or ideas and let us provide a quality service that you require.
All quotes/work completed on time as agreed. Very happy with finished work. Thanks
B&T Brickworks & Developments
Cellar & Basement Conversion
B&T Brickworks and Developments At B&T Brickworks and Developments, we specialise in high-quality home extensions, brickwork, and property development services. With a commitment to exceptional craftsmanship and attention to detail, we help homeowners transform their properties by creating beautiful, functional spaces tailored to their needs. Whether you're looking to add a single-storey extension, expand your living space, build a new garden room, or undertake a complete property renovation, our experienced team delivers reliable and professional solutions from start to finish. We pride ourselves on providing outstanding workmanship, transparent communication, and projects completed to the highest standards. From initial planning to final completion, B&T Brickworks and Developments works closely with every client to ensure their vision becomes a reality. Our reputation is built on quality, trust, and customer satisfaction, making us a dependable choice for home improvement and development projects. Building quality. Creating space. Delivering excellence.
RICHARD NEEDHAM DECORATORS
Cellar & Basement Conversion
Total property maintenance. External painting and interior painting. Paper hanging. Laminate flooring tiling and joinery
Crane Builders LTD
Cellar & Basement Conversion
We are a family run Building Business with over 30 years experience. We specialise in the more complicated aspects of construction including structural and high finish work. We are recognized repairers of all types of P.R.C constructed buildings .
Garage Conversion Specialists – Go Convert Ltd, trading as JMR Building Contractors. With over 14 years of experience, we have built a strong portfolio and loyal customer base, completing over 200 garage conversions since 2017. We are fully insured, and all employees and subcontractors are CSCS trained and qualified. Every project is completed to a high standard at competitive prices.
Highly recommend JMR builders who have been professional, punctual and provided quality material/workmanship. The attention to detail has been spot on.For example they searched across the country to source the same bricks as my main house wall. There quotation was competitive and over half of the cost of one of my quotes. Highly recommend.
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