Welcome to Add-a-Room

A division of Pro-Spec Interiors

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About us

We cover South Wales, the upper part of the South West and the West Midlands, 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

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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  • 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, appoachable, polite and unobstrusive.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.

    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.

    Mr & Mrs Stones – Swansea – Loft Conversion

    We could not be more pleased with our loft conversion. The quality of the work was excellent. In our first meeting David took the time to explain and provide a full understanding of the work required assuring us that would be completed to the highest quality and agreed timescale. All the boys were friendly, trustworthy and couldn’t do enough to help its totally transformed our house.