S.J. Developments is a family run building company based in Exeter, Devon, specialising in loft conversions and domestic extensions. We work largely in Exeter and the Devon area. With over 20 years of experience in the industry, we pride ourselves on producing work of the highest quality.
We cover the entire building process, from designing and constructing the extensions to providing joiners, plumbers and electricians. Our team have all worked for us for several years and are trusted and skilled. All our workmanship and materials come with a minimum 5 year guarantee, including no charge for future repairs on our work. All our Dormer roofs come with a 10 year guarantee, meaning you can be sure you're paying for something that will last and hold its quality.

As members of the Federation of Master Builders (FMB), you can be sure that we offer a service that you can rely on.
We take our craft very seriously and care about our customers, offering you a friendly, personal and above all, professional service. As well as this, we have fair and competitive prices, which includes every aspect of the project. You can be sure that our extensions will add value to your home.
Our building services include:
Free quotes and consultation, Design, Planning permissions and applications, All building trades, Joinery and carpentry, Insulation, Windows, Roofs, Skirting and fittings.

Trades offered

Handyman and maintenance
Builder general
Loft conversions
General extension
Windows, Doors and Conservatories
Window fitter
Roofing general