Building Extensions,

Loft & Basement Conversions.

07939 233336  0114 2492750        

Services we offer :

  •  Design to Completion

  •  New Builds & Renovations

  •  All Roofing Works

  •  Plumbing & Electrical

  •  Structural Alterations

  •  Bespoke kitchens

  •  Wet Rooms & Bathrooms

  •  Private & Commercial


Greentherm Developments Ltd are a well established South Yorkshire Building Company, providing a full range of Building and installation services. If you’re looking for a reliable Builder/installer in Sheffield, South Yorkshire then you can be assured that we will offer you the best service and great value for money!


We rely on word of mouth and recommendations for much of our work and we pride ourselves on the quality, effectiveness and craftsmanship of everything we do. Our friendly and reliable staff are here to ensure you receive the best possible service from start to finish.

Take a look at some of the services we offer and if you need any further advice or information please contact us and we will be happy to help!

why choose us?

We specalise in residential design, from housing developments to house extensions and refurbishments.

  • Whichever service you choose from Greentherm Developments, please be assured that we are fully trained to respect the environment we work within.

  • All Commercial and Domestic Work is undertaken – All work considered.

  • We offer Free Quotes, Estimates and advice to all our customers.

  • We have public liability insurance of £5,000,000, ensuring our customers peace of mind when using our services.

  • All work is fully guaranteed.

  • We are fully qualified, and only employ qualified staff.

  • All works are carried out by our staff who are registered with the relevant bodies.











We provide a personalised service in design, supply and installation of bespoke kitchens and bathrooms throughout South Yorkshire. We work with several leading suppliers of world leading brands.

We have over 25 Years experience and our expertise lies in complete installations of beautiful kitchens and bathrooms that stand the test of time.

New Builds

We build and project manage new builds, extensions, renovations and conversions in and around South Yorkshire. The company has established a reputation for producing workmanship of the highest quality and gained the majority of our business through recommendations.

We bring together experience and expertise to create highly functional and distinctive living spaces.


We specalise in residential design, from housing developments to house extentions and refurbishments. Our architects offer local expertise in the South Yorkshire area and provide peace of mind with a personal and tailored service. Our aim is to maximise the potential of your property with carefully considered spaces and exceptional finishes.

Whether you are  planning to extend, alter or create a new property we can help from concept to completion.





case study

David Mah explains how the brief was achieved:


‘The owners asked us to turn the small existing kitchen and dining area into a space where they could cook and work, whilst still feeling connected to family life.


With this in mind, we created a rear extension that mimics the proportions of the original property and measures 8 metres in width.

It forms an open-plan space that spans across the  rear of the house, with a dinning area, work area and a kitchen at the back.

There are Velux windows to bring natural light into the extension, plus glazed double doors to the rear with matching windows and now connect the internal area to the tiered garden, improving access to the outside space.


‘As well as installing rooflights, we used reflective materials to maximise the daylight, which is important to the feel of the extended ground-floor space. While most of the ground floor is now open-plan, a separate work area, receives natural daylight and is still connected to the open space allowing for a great family area.’




Greentherm Developments Limited.