BUILD: BUILDING SOMETHING YOU’VE ALWAYS WANTED

We have a wealth of experience in building and renovating homes in and around Sheffield. Our expertise gives you complete confidence in any build project you have in mind. Knowing exactly what’s going on with your project is important, which is why our team will always keep you in the loop every step of the way. From luxury housebuilding to quirky loft conversions – we have the skills to deliver your desires.

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Building Services · Sheffield

Space Your Home
Doesn’t Have Yet.

Designed, engineered & built under one roof.

Extensions, lofts, basements and whole new homes — taken from first sketch to signed-off handover by one accountable Sheffield team. Small domestic work to £1m builds.

★★★★★Best of Houzz · 2022 / 25 / 26 Itemised specifications One team, start to finish
Architect-designed stone home, Sheffield — design services
Best of HouzzService · 2022 / 25 / 26
Drawn, calculated & approved under one roof.
Single-storey front and side extension, Sheffield
Best of HouzzService · 2022 / 25 / 26
Everything, under one roof.
02 · Building Services

Extensions

Single & double-storey extensions, wraparounds and garden rooms — designed around how you actually live, and built by the same team that drew them.

Architectural design, planning and building regulations, then the build itself: groundworks, structure, glazing, roofing — through to the kitchen, heating, electrics and decoration. One team, one programme, one point of contact.

Single-storey, double-storey and wraparound extensions are each priced individually — you get a fully itemised quote from a measured survey before anything starts. Before anything starts you get a fully itemised specification and a step-by-step product choice list — so every line is visible before you commit.

Many extensions fall under permitted development. We confirm which route applies at the first visit, and where an application is needed our in-house design team prepares and manages it — drawings, forms and neighbours’ notices included.

Loft conversion with dormer, Crosspool Sheffield
Best of HouzzService · 2022 / 25 / 26
Checked before you commit.
03 · Building Services

Loft Conversions

Dormer, hip-to-gable and mansard conversions that turn dead roof space into bedrooms, studies and the best view in the house.

We start with a free feasibility check — head heights, stair position, structure — so you know it works before you spend a penny on drawings. Then steels, dormers, stairs, insulation, en-suites and fitted storage, all by one team.

Dormer, hip-to-gable and mansard conversions are each priced individually — structure and finish set the scope, and your quote itemises every line. The quote is itemised line by line before we start.

Most lofts are built through the roof with scaffold access, so your home stays sealed and liveable until the staircase is cut through — usually in the final weeks. We plan that moment with you, protect everything below, and clean daily.

Lower-ground conversion with rooflight, Ecclesall Sheffield
Best of HouzzService · 2022 / 25 / 26
Engineered from the ground down.
04 · Building Services

Basement Conversions

A whole new floor beneath your home — excavated, waterproofed and finished into space you’ll use every day.

Structural design and calculations, excavation and underpinning, tanking and waterproofing, then the full fit-out — cinemas, gyms, utility floors and guest suites, finished to the same standard as the rest of the house.

Sheffield’s stone terraces and hillside plots often suit basement work well, but ground conditions decide it. Our building surveyors assess yours and tell you honestly whether the numbers stack up — before any commitment.

Basement costs vary more than any other project type — depth, access and water table all matter. After a survey you get a costed feasibility picture first, then a full itemised quote if you choose to go ahead.

Luxury home building in Walkley, Sheffield
Best of HouzzService · 2022 / 25 / 26
One promise, kept for a year.
05 · Building Services

Luxury Home Building

Ground-up homes designed and built end to end — from plot appraisal and first drawings to foundations, fit-out and handover.

Plot appraisal, architectural design, planning and building regulations, structural engineering — then the complete build: foundations, structure, envelope, services and a bespoke fit-out. One accountable team throughout.

Our projects range from £15k to £1m, and every one gets the same team, the same care and the same single point of contact. Costs are itemised by package — structure, envelope, services, fit-out — so you can steer the budget where it matters most to you.

You get a named project lead, a weekly progress report and scheduled decision points for the choices that shape the house. Everything else is handled — you’re informed without being burdened.

Open-plan home remodelling, Whirlow Sheffield
Best of HouzzService · 2022 / 25 / 26
Opened up, properly.
06 · Building Services

Home Remodelling

Same footprint, different house — walls moved, rooms opened up and layouts redrawn around the way you actually live.

Structural openings and steels, open-plan knock-throughs, moved staircases and reworked circulation — with heating, electrics and finishes updated as we go, so the house is done once and done properly.

Plenty of Sheffield homes have the space they need in the wrong places. Rearranging within the existing footprint is often faster and considerably cheaper than extending — and we’ll tell you honestly which your house calls for.

Remodelling is quoted after a visit — structure, services and finishes vary too much for a useful flat figure. You’ll get costed options first, then a fully itemised quote for the scope you choose.

Plan With Confidence

A Figure Before We’ve Even Met.

Pick your project and see a typical Sheffield starting range — no email, no obligation. Your real quote is a thorough, itemised specification with a step-by-step product choice list. For the full picture, the home page estimator adds ambition and finish level.

Your Project · Extension
Next: survey → design → planning → build

Indicative, ex-VAT, for Sheffield & South Yorkshire. Every project is quoted properly after a visit.

“One phone call, one team, one programme. The build ran to the week and the house feels like it was always meant to be this way.”

Homeowner — Totley Rise, S17
Best of Houzz · Service 2022 / 25 / 26   |   200+ projects delivered
Ready when you are.

Which Project Is Yours?

Tell us and we’ll come back within one working day — with next steps and a named project lead.

Enough about us, what do our clients say?

“Where to start! After purchasing our house late last year we were looking for a trustworthy and high quality company to support us through our renovation. Unity have made the whole process painless and enjoyable. From the guys who did our plastering and structural work (Jamie and Callum) through to our amazing Bathroom fitter and pro of all trades Jason, everyone was kind, patient and professional. Renovations can be overwhelming and intrusive, but we couldn’t have been made more comfortable by the team. We would recommend them to anyone looking for work done - absolutely flawless. Thank you for turning our house into a home. We will be back!”

Phoebe Perry

“We had a complete renovation of our 4 bedroom house including extension and change of floor plan. This large project involved regular discussion and detailed planning. We were very excited to understand Unity’s enthusiasm to deliver such an extensive project. During the long process, we found unity to be extremely thoughtful and driven to deliver our desired outcome. Elliot communicated well with us to carry out our vision and we had regular meetings to understand the scope. Adrian’s commitment to achieve the best possible standard is admirable. We found the Unity workforce very engaging with our young family and are extremely pleased with our end result. We couldn’t be happier with our home!!! Thank you!!!! ”

Dhivya John

“The team was professional, friendly, and clearly experts in their field from start to finish. The whole process was very collaborative. They took the time to really understand what we wanted and even suggested ideas that made the final design even better. Communication was excellent, and we were always kept in the loop on progress and costs. In fact, due to the collaborative nature of the company and having the flexible ability of the Cost Plus agreement, Unity came in under budget, meaning we actually received a saving on the initial projected cost. As you can see from the photos the quality of the work speaks for itself. The patio looks amazing, and the landscaping has completely transformed our outdoor space. You can tell they really care about the details, and we are so pleased to have our garden back from where it was before they started in the first photo! Our experience was nothing but positive, and we’re so happy with the work they did. We’ve already started planning our next project with them. As a homeowner it is really hard to find trustworthy professionals and sadly we have had experience of the some of the cowboys that are out there. However, it’s refreshing to work with a team that genuinely delivers on their promises and we feel we can trust. Unity Development Group is a rare find, and I can’t recommend them highly enough.”

Claire Morley

“Words cannot describe how fortunate we have been to have Elliot and his team working on our house renovation project. Consistently demonstrating exceptional levels of knowledge, commitment and professionalism. Furthermore, the level of communication flow has been excellent throughout. It is clear that they are perfectionists with a wealth of knowledge and skills within the team, excellent leadership and are client-centred: sharing their expertise while harmonising with client expectations. We have recommended Unity to several of our friends who have already jumped on board (or pending) and we all share the same feeling. If you are looking for a team at the top of their game, to help make your home perfect, then I believe it would be difficult to find a team stronger than Unity.”

Hey Long Ching

“Would highly recommend Unity. Elliot, Adrian and all the team that worked on our home improvements were so friendly, professional and skilled at what they do. Our plans evolved during the project but Unity were flexible and happy to adapt to meet our requirements. Great company to deal with.”

Jayne Bacon

“Every member of his team was incredibly kind, patient in communication, and demonstrated a high level of responsibility. They handled every detail with care and completed the work to an outstanding standard. No matter the size of the request, they gave it full attention and dedication, ensuring the best possible outcome. Unity Development Group is the most reliable company I have encountered since arriving in the UK, and I am truly grateful to them. ”

Chloe Tong

“We have used these guys to renovate our first home and they have been excellent. They've always showed a great professionality and empathy and have walked us through a very stressful process very nicely. Super transparent, talkative and attentive, always watching the spending and trying their best to deliver a great service and finish respecting our budget. We can't recommend them enough!”

Daniel Marquez Pedrosa

Our contribution to the planet

Unity is dedicated to environmental sustainability, integrating eco-friendly practices into its operations and actively participating in global initiatives like Plant-for-the-Planet. Despite its size, Unity has planted 27 trees, contributing to reforestation and climate change mitigation. Through sustainable operations, community engagement, and transparent communication, Unity inspires eco-conscious consumers and stakeholders to join its mission for a greener future.