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Browse Cellar & Basement Conversion specialists

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Fully qualified remedial damp proofing consultant. Dealing with cellar/basement waterproofing. all work carried out by fully trained and experienced technicians, Long term guarantee on all work. Peter Barber CSSW. CRDS MIWSc

Latest homeowner review

Reviewed by Dave on 5/3/2019

Came to do a damp survey at our house. Having been quoted large sums of money to address the problem by other tradesmen it was refreshing to receive professional advice on how to manage the problem, especially as, since the source of the problem was identified as a leak a plumber is coming to fix tomorrow, they did not recommend any additional damp proofing for the time being and so did not make any money from us. Wrote up his findings in a report and emailed to me just a couple of hours later.

Homeowner If you are considering having your damp and unusable cellar or your garage space converted into a luxury living space or just a dry storage area, The team at Creative Basements and Garage conversion specialists can help we can bespoke design a luxurious living space designed to meet all your needs

Latest homeowner review

Reviewed by John on 30/4/2019

Garage conversion Totally overjoyed with the garage conversion this was quite a urgent project to get started As i had family coming over to stay for a couple of weeks . I am so pleased I contacted Stan and his team who started straight away. They have turned a bit of a sloppy storage garage in to a high end luxury bedroom with a en-suite. It looks fantastic,nice and bright,they are all hard working and cleaned up every night . If your looking for good reliable tradesmen these are the people. Thanks Stan

All our work is carried out by seasoned builders, qualified specialists and managed by an architect and a building control officer. We take pride in our user friendly approach and professionalism and always aim for a flawless finish.

Latest homeowner review

Reviewed by Darryl on 15/7/2019

Polite and prompt. Good service!

Hi there we are clean and tidy and like all customers to be very happy we take any got big or small I have been in all trades since I was 16 years old I like to take joy with my work I can’t to wait to hear from you Many thanks

Latest homeowner review

Reviewed by Ben on 24/7/2019

good advice, prompt, friendly, good work - would happily use again!

35 years experience in building and maintenance, fully insured, qualified engineer and project manager. All maintenance and repairs to property and gardens. Extensions, new builds and surveys. All trades provided. Collections, deliveries and removals. Personal assistant services, errands, small jobs.

Latest homeowner review

Reviewed by Jamie on 14/7/2019

Fantastic job, Colm kept me informed of when he would be arriving. Well recommended. Came fully prepared and had great attention to detail. 10 out of 10.


Latest homeowner review

Reviewed by Graham on 24/7/2019

Matt and his team have done a fantastic job with converting our basement into a 2 bedroom flat. Reasonably priced, honest and reliable. I wouldn’t hesitate to recommend this company.

Property Development Specialists All aspects of work undertaken Domestic & Commercial

Latest homeowner review

Reviewed by Jo on 12/1/2019

Absolutely exceeded expectations. Thank you!

G and D building services. We have 30 years experience. Our projects have ranged from small works up to barn conversions. No job is too small. We are a very friendly company and offer advice when needed.

Latest homeowner review

Reviewed by Paul on 23/1/2019

Great from start to finish. David responded to my query quickly and came around to quote as planned. He was punctual (despite the snow) and completed the job to a high standard within a day, he even did a great job of cleaning up! He replaced my water damaged ceiling and installed new lighting, no hidden surprises and on budget. Highly recommend

Latest homeowner review

Reviewed by Jewel on 2/2/2019

Best customer experience. I will continue to work with him here and there. Very hard-working guy and understands his customers.

Hello there, I'm professional qualified Tiler with 15 years . Also my additional abilities is painting and decorating , plastering, plumbing, rendering , carpeting etc. I do many amazing project with highest standards. My philosophy of action results from the passion of work to amaze and satysfy people who need support.

Latest homeowner review

Reviewed by William on 6/6/2019

Damian is a really nice guy, he came around and gave me a very reasonable quote on the night and completed the job to a high standard in the following weeks. Will recommend highly for future jobs

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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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Recently completed jobs

Here's what's been happening in and around your area

this is a test job do not buy

this is a test job do not buy this is a test job do not buy

milking parlour conversion

conversion with staircase, fitting of doors and bricking up of doorways.

Change cellar

Small cellar is already converted but needs changing round so that there is a utility room and a study

Rework of Floor Joists for...

We are looking to 'rework' a staircase between the ground floor and basement of a Victoria Terrace. This will require adaptions to the floor joist to...

Repair/Redo Cellar conversion

We had a cellar conversion completed last year. We raised concerns whilst the work was being done that it wasn't being done correctly and now the...

Basement egress window

Hi. Trying to find out the cost/feasibility of putting a light well/egress window into my existing basement conversion so it classes as a bedroom

62sqm basement

Hi, we have a cellar that is already 2.1m head height in 2/3 of the area that needs the blinding removed and waterproof slab installed and an...

general building work

widen internal arch (lintel required) fit suntubes or skylight into kitchen fit underfloor heating in 3 rooms fit oak flooring tile kitchen floor fit...

Basement conversation

Full basement conversation. Drainage plastering

Cellar conversion into an...

Cellar conversion into an annexe. Plans already done.

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.


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