Welcome to Add-a-Room

A division of Pro-Spec Interiors

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About us

We cover South Wales and the upper part of the South West, with offices in Swansea.

We are a family business and work by principles put down by our father when he first started in the building trade in 1951, those principles of quality and respect have not changed and will always be the cornerstone of everything that we do.

Adding a room to your home can be a sizeable investment and we always recommend that you should visit our Buying Advice page for some common-sense ideas that will help you make the right choice.

The add-a-room concept is quite simple; the room we create can be used for whatever you wish. The possibilities are endless, let your imagination fly and talk to us about how we can help you create your dream.


There are many benefits to converting your garage or loft, invariably the conversion will add value to your home and significantly increase your living space. To compliment your property we can also discuss a garden room or conservatory.

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Garage Conversions

A standard single garage is approximately 150 sq ft, too small to fit a family car (and open the doors)…

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Loft Conversions

A loft conversion is an excellent way to add space and value to your home and at add-a-room.co.uk we have…

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Garden Rooms and Small Extensions

Add-A-Room specialise in a full range of garden rooms and conservatories to compliment your existing property. Our skilled craftsmen are…

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  • Mel – Garage Conversion
    David Sparks and his team did my garage conversion, he was very helpful at the planning stages in terms of how best to deal with challenges and conversed with the building inspector for me which was a great help. Everyone of the tradesmen from the electricians to the decorators that attended the job for David were professional, helpful, polite and very tidy with regards the way they worked and whilst I wasn’t looking forward to having builders doing major works they kept me informed as they went along and took away any worries I had with regards any element of the building works. I am delighted with the final outcome and would recommend David and his team to anyone looking to do building works.

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    Testimonial One
  • Mr & Mrs Burrows – Gorseinon
    MD Dave Sparks leads a slick team, each highly Skilled in their own craft. The whole process runs like clockwork, causing minimal disruption to the toing and froing of a busy household. This team is professional yet friendly, approachable, polite and unobtrusive.They worked remarkably diligently and with great care; they were clean, timely, trustworthy and reliable. we did not have to worry about a thing. The building team finished our garage conversion in just 6 days and had completed all the detail work and finishing touches to a very high standard within the 2 weeks that had been quoted, all to our credit-crunch busting, space-creating delight! A really good experience, an amazing finished product – We highly recommended Pro-Spec.

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    Testimonial Two
  • Mr & Mrs Thomas – Swansea – Garage Conversion
    We needed a larger kitchen area and the only option we had was to convert our garage. Pro-Spec converted the garage with ease and fitted a high quality kitchen and were even able to create enough space to also incorporate a dinning/sitting room. David provided an exception quality and reliable service with the boys turning up when he said and the conversion being completed quickly and without any fuss. The conversion has changed our house and given us extra room we thought we couldn’t have. Very impressed with the service and quality and we wouldn’t hesitate to recommend David and his team.

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    Testimonial Three