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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.

Rm property maintenance is a family run business with a 10 years experience behind us offering you a wide range of service at affordable prices specialist in all Upvc products and roofline products guttering repaired. And renewed

Latest homeowner review

Reviewed by Luke on 16/8/2018

They came out when they said they would, they completed the job quickly and to a high standard and cleared all their mess before leaving. No making the job out to be more then it was and no hidden costs. Well priced friendly tradesmen that can be trusted. Would recommend to anyone.

J brooks and son is a family run business that cover all aspects of general building and landscaping from driveways patios and decking to turfing tree work and kitchen fitting Fast and friendly group of guys .we aim for maximum customer satisfaction and There literally is “no job to big or small” for us

Latest homeowner review

Reviewed by Joshua on 16/8/2018

Jack was quick to reply and clear in all of his messages. The job was expected to take two days but only took one and him and his team worked hard to get the job done to our satisfaction. Really impressed, so much so that we are using him again.

Its More than 20 years running business.great people with no fuss at affordable prices. It's our inspiration to have the best home improvement company in Manchester so our customers can expect nothing but the highest standards in customer service and workmanship. The price we quote is the price you will always pay

Latest homeowner review

Reviewed by Dominic on 16/8/2018

These guys are quick and reliable to turn up and nice guys. However, the job they did on our extension was done to an unacceptable standard and we have had to pay another tradesman £580 to do properly. The small roof that was built on our extension was left with quick fix expanding foam all over it, the flashing used was cheap and ineffective according to a family tradesman and must be replaced. No gutter was put on the roof so water runs on to the floor and causes damp to rise.

Latest homeowner review

Reviewed by sean on 16/8/2018

We had an urgent job to refit shower & bathroom floor, Viorel & Adrian responded quickly communicated well & did a good job

Can do most jobs apart from electrical and plumbing ,always to a high spec and polite and respectable to all customers ,handyman painting carpentry fence erecting to landscaping to re pointing ,no job to big or small for AB contracts regards adam blaze

Latest homeowner review

Reviewed by Mike on 15/8/2018

Adam was very helpful, arrived on time, high quality of work and cleaned up after the work was completed. Would highly recommend!

we are a family run construction company with over 40 years of experience in the building trade, located just outside of Chichester, we service all surrounding areas in varies construction needs from bathroom refurbishments to full house renovations, interior & exterior property maintenance.

Latest homeowner review

Reviewed by mo on 15/8/2018

lf it had said spectacular on the rating l would have put that! glen arrived and he and dave really were amazing..l had thought it would have probably taken all day but it was up and looking fantastic by lunchtime! l recommend them with no reservations at marshall

We are small family run business providing building and landscaping, in Great Yarmouth & Norwich, sourounding areas, with in the company there’s over, 8 years experience if different parts of the trade,

Latest homeowner review

Reviewed by Michael on 15/8/2018

customer service was good. friendly and listening

compleat property maintenance over thirty five years experience in the building trade

Latest homeowner review

Reviewed by Catrina on 14/8/2018

reliable lovely guy

Latest homeowner review

Reviewed by Harry on 14/8/2018

Excellent service. Hardip was reliable, efficient and polite. He knows the trade well, and did an excellent job.

We are a small family run business based in Fife and working all over central Scotland. We provide excellent Roofing, Property Maintenance and Building Services with exceptional quality work and customer care. JRC GROUNDWORK DIVISION now underway.. • free no obligation quotations and advice

Latest homeowner review

Reviewed by Brian on 14/8/2018

James and his team did an excellent job from start to finish

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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)?

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

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

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  • 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.