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Find a local basement conversion specialist

This page has everything you’ll need to know about finding and hiring a local basement conversion specialist.

Browse Cellar & Basement Conversion specialists

Take a look at our Cellar & Basement Conversion specialists profiles, read reviews and request quotes directly.

We believe that no job is too small. From home refurbishments to large commercial contracts, we are experienced and knowledgable to get the job done for you! Every job is managed by coowner Michal to ensure every project is delivered to the highest standards. We work with you every step of the way to capture your requirements and ensure the result is just as it was envisioned. We take pride in our ability to provide professional, timely and experienced services.

Trades serviced: Bespoke furniture, Bespoke kitchens, Cellar & Basement Conversion, Complete Kitchen Refurbishment, Conservatory

Latest homeowner review

Reviewed by Ade on 24/6/2018

Initially this tradesman was a dream come true. He got on my job, and carried on working in New areas, until I realised that he did not have permission from other trades. When he agreed to make corrections, he decided that he will only come if I pay extra, though he abandoned the job eventually, he has refused to return my tools and keys since he left my job half done despite multiple calls, emails and messages for the last 2 months. Can rated people help to get my tools and keys please. I will be gratef

A local honest and reliable company that always puts the customer first. The work we complete is commercial and residential building alterations and renovations. We provide a competitive and affordable service

Trades serviced: Bathroom Design, Bathroom Installation, Bathroom Repair, Bathroom, Kitchen and WC Plumbing, Cellar & Basement Conversion

Latest homeowner review

Reviewed by Kevin on 23/6/2018

excellent work by Wes a very friendly lad at such short notice. Fine work 5 stars

Pinecraft construction has been established since 2003. I do all aspects of building work, joinery, plumbing,minor electrics, alterations, extensions,newbuilds,tiling,etc. No job is too big or small. I take pride in my work and will always offer the best of my ability and experience to my customers and always turn up on time as agreed. I offer a great job at reasonable prices to all of my customers.

Trades serviced: Access Control / Door Entry, Aerial & satellite dish installation, Bathroom Installation, Bathroom Repair, Bathroom, Kitchen and WC Plumbing

Latest homeowner review

Reviewed by Stuart on 23/6/2018

Did a great job

Welcome to Waterproofing Solutions.We are a family run building company and pride ourselves on customer care as can be seen in our ratings.

Trades serviced: Brick & Stone Cleaning, Cellar & Basement Conversion, Chimney Building / Repair, Conservatory, Damp Proofing

Latest homeowner review

Reviewed by william on 23/6/2018

We are very pleased with the work carried out by Marcus, we found his work was completed to a very high standard, he's reliable,friendly and professional, and we wouldn't hesitate in recommending him.

at j.s.j reputation is everything! thats why we deliver quality tradesmen to ensure top quality work, at affordable prices, with over 15 years experience, we cover all aspects of the trade ,property maintenance 2 new builds,no job too big or small

Trades serviced: Access Control / Door Entry, Bathroom Design, Bathroom Installation, Bathroom Repair, Bespoke furniture

Latest homeowner review

Reviewed by Elaine on 23/6/2018

Professional job carried out on time for a fair price. Would recommend.

We are a joinery company. Focusing on kitchen and bathrooms mainly. We do a lot of contract work for different companies. We have a team of tradesman. To get the job to a high standard.

Trades serviced: Bathroom Design, Bathroom Installation, Bathroom Repair, Bespoke furniture, Bespoke kitchens

Latest homeowner review

Reviewed by Steven on 23/6/2018

did a great job, more worked booked in as a result. cheers Ste

Property Fit-Out LTD is a well-established company which has built up a first-class reputation in the construction and property maintenance sector by successfully delivering high-quality services and projects.Our core values are quality and efficiency.

Trades serviced: Bathroom Design, Bathroom Installation, Bathroom Repair, Bathroom, Kitchen and WC Plumbing, Bespoke furniture

Latest homeowner review

Reviewed by Rachel on 22/6/2018

Excellent communication -responded quickly and fitted in the job at very short notice. Tradesmen excellent - skilled, efficient, tidy, pleasant, helpful. Work completed quickly to a high standard and area left clean and tidy.

Well established certified building team working in W, NW, N and Central London for 15 years, new to this site. Full range of services from repairs, decorating, carpentry, floors, electrics, bathrooms, kitchens, to full renovations. Small jobs welcome.

Trades serviced: Access Control / Door Entry, Bathroom Design, Bathroom Installation, Bathroom Repair, Bathroom, Kitchen and WC Plumbing

Latest homeowner review

Reviewed by Ian on 22/6/2018

Charlie removed our old kitchen and prepared the walls and electrics prior to installation of the new one. Happy with the work done - he clearly knows what he is doing. Reliable and quote was competitive too.

We are a family run business based in Westbromwich. We specialise in manufacturing and installing UPVC windows, doors, conservatories, bi folding doors, orangeries and porches. Also any building work also undertaken such as extensions, new build houses and many more types of building work. We have over 20 years experience in the trade and wont be beaten on quality.

Trades serviced: Cellar & Basement Conversion, Chimney Building / Repair, Conservatory, Decorative Glazing, Garage Conversion

Latest homeowner review

Reviewed by Rod on 22/6/2018

Will keep my ratings low until I have my problems sorted.

All aspects of roofing works from minor repairs to full re slates and tiles. Guttering services including gutter replacements, downpipes and uPVC fascias and soffits. Professional, punctual and reliable service.

Trades serviced: Air Conditioning / Refrigeration, Cellar & Basement Conversion, Chimney Building / Repair, Conservatory, Door / Window painting

Latest homeowner review

Reviewed by Susan on 22/6/2018

Mick rang to let me know he would take the job and arrived on time. After explaining what needed doing he wasted no time getting on with the work and did a great job. He is very efficient and friendly and can be recommended. Many thanks.

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Cellar & Basement Conversion specialists - what you need to know

Basements and cellars are all too often missed opportunities, with the potential to add real value to your home. Conversions can unlock this potential, transforming underground spaces into useable rooms to suit your needs. Whether you’re looking for a guest room or granny flat, a larger kitchen or somewhere to let that gym equipment gather dust… a conversion may be the answer.

The precise nature of the conversion will depend on your plans for the space but regardless of its intended use, your new basement will need damp-proofing. Heating and ventilation systems must also be installed, to ensure the space is safe and comfortable.

Though many period properties will have basements, they are mostly cramped spaces intended purely for storage. Your builder may therefore need to dig down substantially to increase the head height. You will want to be sure your new basement isn’t claustrophobic and that any new rooms adhere to building regulations regarding minimum head height.

You may choose to extend your current basement beyond the original footprint of the house or building. With the right guidance, extending out beneath a garden can be a great way of maximising space. This may also allow your builder to incorporate light-wells into the design, which is an excellent way of introducing natural light into your basement. 

If there is no existing basement or cellar in your property, major excavation work will be necessary to create one from scratch. Along with any excavation, a new staircase will be added and your builder may also need to underpin any party walls.

Cost of cellar and basement conversion work

There are significant variables when it comes to costing – namely the extent of structural work required, access and ground conditions. The cost of damp-proofing, for example, will be dictated by the condition of your basement to begin with. If you’re looking at additional features, such as light-wells or bathrooms the extra work entailed will increase costs significantly.

For the most basic basement conversion, where no digging down or underpinning is required, it is advisable to budget £600-£1200 per square meter. If your basement floor needs lowering, costs will rise to between £1650 and £2200 per square meter. For basements created from scratch, quotes will be in the region of £2500 - £4000 per square meter.

The qualifications your tradesperson needs

Basement and cellar conversions can be carried out by reputable builders, often working in tandem with structural engineers.

Some builders will carry a card from the Construction Skills Certification Scheme. If your builder lists any specific qualifications it’s always a good idea to ask for proof of these before work begins.

There are various official trade bodies in the UK and it‘s advisable to check that your builder is registered with one of them – it’s not a necessity but is usually a good indication of how reputable they are. Each body has its own set of criteria, which must be met to qualify for membership.

You can find more detailed information about the different qualifications an experienced builder might have here

Planning permission for cellar and basement conversion jobs

Unless there is significant change to the external appearance of the building, planning permission is not usually required for basement or cellar conversions. This will obviously differ for listed buildings, or those in conservation areas.

You are likely to need planning permission where major excavation work is required to create a new basement, or where your basement is to serve as living accommodation. Further information can be found here

Insurance for cellar and basement conversion work

Public liability insurance is a requirement of any reputable tradesperson. This protects against any accidental damage to your home.

Questions you should ask your tradesperson

  • Do they have public liability insurance?
  • Do any of the planned adjustments require planning permission?
  • Does the basement design adhere to building regulations (namely ventilation / fire escape routes / ceiling height)?

How our service works

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  • Get quotes

    Up to 3 tradespeople can provide a quote, but on average you'll get 1-2.

  • Check ratings

    Look at each tradesperson's profile page to see their ratings and reviews.

  • Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  • Job done

    Leave a rating for your tradesperson based on quality, reliability and value.


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How our service works

  1. Create a job - it's free

    We'll connect you with the right tradesmen, from over 30 different trades.

  2. Get quotes

    Up to 3 tradesmen can provide a quote, but on average you'll get 1-2.

  3. Check ratings

    Look at each tradesperson's profile to see their ratings and reviews.

  4. Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  5. Job done

    Leave a rating for your tradesperson based on quality, reliablity and value.