Your home should reflect your vision and enhance your lifestyle. With over 25 years of experience in property development, we work closely with you to create spaces that go beyond bricks and mortar, transforming them into your dream home.
Our passion for thoughtful design and quality craftsmanship can be seen across Sheffield. We specialise in revitalising properties with a deep respect for their history while adapting them to modern needs. We’re not just property developers – we’re here to help you bring your ideal living space to life.

Transform your property with a bespoke extension designed to enhance both space and style. We create luxury extensions tailored to your unique vision and reflecting your personal taste. Whether you’re looking to expand or elevate, we’ll help bring the perfect space to your home without the hassle of moving.
Looking to expand your living space and value to your home? A loft conversion is a cost-effective way to transform unused space into a functional, stylish area for your family.
Whether you’re looking for a new bedroom, office, or living space, our expert team can advise you on enhancing your existing structure to create the perfect home.

"James did a great job project-managing the refurbishment to our apartment, especially considering I was based out of London and unable to regularly check on progress in-person. His past experience was evident in all the design tips he shared (and implemented) to prep the flat for a quick sale. Finally, and most importantly, the realistic timelines which were very much appreciated in order to keep the project on track. Thanks, James!"
TASHIYA – BROOMHILL, S3
We heard about James and SDP through a recommendation, so arranged what was a very friendly and informative meeting. We received a quote from him that was good value and comparable to other quotes received. We chose James because the finishes on the pictures on his website certainly looked impressive, and for the personal touch that was already apparent. This was also true of Steve, who designed the kitchen, and who was equally friendly and full of ideas. Nothing was too much trouble throughout the project, which was completed quickly and in a highly efficient way. We were in very regular contact with James, who was incredibly accommodating of anything we asked, and offered plenty of good suggestions, always looking to minimise costs as well as deliver a quality product. An example of this was a suggestion to alter the original design to incorporate a goalpost steel and remove a large pillar – something we didn’t think was feasible. He did this despite additional pressures on his team’s schedule, and kept costs down as much as possible. The end result was phenomenal - and hugely appreciated - transforming the space into a stunning kitchen diner that has wowed everyone who has visited since. Throughout the project, we were kept completely informed of timescales and what was happening next, and this was all done with a great degree of humour – the relationship developed between us and his team into a really close one. All of the numerous guys who worked on our extension were friendly, polite, clean and highly skilled. The end result has transformed our lives. It’s the first extension we’ve had done, and we were full of trepidation, but the whole experience was far less stressful than we imagined it would be; a major factor in this was that way that everything was managed via James as our main point of contact (although the various workmen were equally accommodating whenever we asked anything of them). All in all, I would highly recommend James and SDP. It’ll be the bathrooms next! Cheers bud Matt
Matt & Jane Loader – Whirlowdale Road, S11
"As new house owners, we had no experience of having work done on property. James and his team made the entire process simple and easy, working with extreme professionalism, to schedule and on budget. Even our requests for custom wardrobes and awkward tiling didn’t phase them! We are overjoyed with the results, and will seek out SDP next time we need work done. Thanks again, and send out regards especially to Gundas! Lizzy and Ian"
LIZZY & IAN ATKINS – CROOKES, S10
"When we first thought about having the house extension built, I expected to be fulfilling the role of project manager, organising the trades and resources etc. But when the quote came in from SDP, which included James’ performing that task, it seemed a much more sensible idea to leave it to him given the differences in our relative experiences of the building trade (I had none). James did as he’d promised and turned up almost every day he had workmen here, making sure they were doing what they were expected to and that they had the resources they needed. He also kept us well informed about what to expect next. He’d provided a complete plan and timescale (which was perhaps a bit ambitious) at the start, and as is the case with many builds, things sometimes happened beyond our control that impacted the completion date. But James was always happy, willing and able to work around the delays, revising and rescheduling as required. Throughout the whole build James and his team have always been friendly, honest and polite, and have often contributed ideas and suggestions for making the build better, more professional and more effective. Now the build is finished, we’re delighted, as we have a new kitchen, garage and workshop that get’s a ‘Wow!’ from everyone who sees them. We are happy to recommend SDP and would have no hesitation in using them again."
ANDY TIMMONS – SOUTHALL, S20
"After hearing good things, I contracted James and his team to do some considerable refurbishment work on one of my student terrace houses. The property needed a full loft conversion, a refurb of the main bathroom, bedroom, and dining room, and a totally new kitchen. Not only that – but with it being a student property we only had the small window of the summer holidays to get everything looking tip top again in time for the new academic year. It was a tall order but the job was completed to highest standard and with complete efficiency from the whole team at SDP. I couldn’t be happier with the work. Everything was completed on schedule, and with total transparency from James about where we were at, at every stage. Because of the terms and conditions drawn up in advance, I knew the exact schedule of works. Payment was spread across the duration of the project and there were no hidden costs. SDP also sourced the kitchen themselves, using my specifications – which was a massive weight off my shoulders. The team were always punctual and polite. All in all, I couldn’t recommend them highly enough."
TONY DOUBLEDAY – HILLSBOROUGH, S6
"Hair Salon Design Set Up. My Project was to set up a hair salon on the first floor of the striking and iconic ‘Sinclair Building’ in Sheffield City Centre. The Sinclair name itself is synonymous with quality, taste and a name ensconced in the history of Sheffield so the quality and finish of the project had to match the quality of the Sinclair’s store. SDP understood this from the start and James Clarke (Managing Director) project managed it personally from day one. The main reason I chose SDP was that I needed a diverse range of trades, joiners, plumbers, electricians, tilers and floor layers and SDP have highly experienced personal in house, who regularly work on “Blue Chip” projects..so I didn’t have to wait for a contractor to “fit me in” between jobs. The other unique factor for using SDP was that they also fabricate designs from stainless steel which was exactly what I wanted, as I needed shelving, sinks and panelling making to bespoke specifications out of metal. Working with James Clarke was an very enjoyable experience and I enjoyed the project immensely..there were no major problems, the project was finished bang on time and with no overspends! I would rate SDP ten out of ten and will be using them for my next shop and all future work on my house. Duncan Gillespie The Cutting Club"
DUNCAN GILLESPIE – CUTTING CLUB HAIR STUDIO, SHEFFIELD
SDP recently completed our loft conversion, from start to finish they were superb! James and the team were incredibly open minded and friendly, they listened to all of our requirements. They kept us up to date with all progress and any amendments / changes which were required they offered options along with the pro / cons to each choice. Each day we were made aware of what they were doing and progress which had been made. They ensured the site was tidy and clean after each visit, which was important as we had to live in the house during the conversion. The finish was amazing and we would highly recommend them to anyone doing any building work. Absolute pleasure and we will always look to use them in the future.
James Wilson – Old Tupton, Chesterfield
"Thank you very much for all at SDP Ltd who have recently refitted our kitchen and carried out building works to make our kitchen and dining room open plan. The work was carried out to a really high standard and all of the workmen who attended our house were friendly and professional and left the house tidy once they had finished each day. The work they have carried out is fantastic and we are really glad that we instructed SDP to carry out the works which were all organised for us from start to finish. Thanks James. Lindsay"
LINDSAY COATES – RIDGEWAY, S12
"Our long awaited extension is so impressive and looks amazing. Everyone who comes to the house and sees it, always gives the same reaction – Wow! James and his team were incredibly helpful throughout the whole process. At one point we wanted to amend a section of the build, James worked with us to make sure we got the result we wanted and the finished result was definitely worth it. The extended area has given us much more space and light and creates a wonderful relaxing environment which is perfect for a family with teenagers. We would highly recommend James for any building project , his approach is professional and he looks after his customers well, we will always return to his company for anything we may need in the future."
SUE & PAUL STANDLEY – MILLHOUSES, S7
"We have recently moved house and decided to knock through a couple of walls to make a larger kitchen diner. Initially we contacted about 5 other companies but for one reason or another they were not interested or didn’t turn up. I felt like I was coming to the end of my tether with it all, then I saw one of the Sheffield Development Property Vans; I made a note of the name and sent James a text. He arrived when he said he would, he helped us plan the space and dealt with the building inspector. What a refreshing change! The work started when he said it would ( almost to the minute ) and the guys who turned up worked in a very professional manner, they did not stop, not even for a break! They really did put in a sterling effort! Am I happy with SDP? Yes, I am delighted. Thank you James, Paul, and Guntis! Thanks again James"
ANGIE CLEMSON – SHEFFIELD, S8
"We recently used SDP to relocate our bathroom and the other rooms on our first floor. From the initial visit to the end of the build they understood what we wanted and worked with us to achieve it. They removed the existing bathroom and completely relocated it, including all fitting and plumbing, a new wall, doorway, skirting boards, and skimming the walls in the process. They protected the carpets throughout the work and tidied at the end of each day. They had great attention to detail and the tiling in the bathroom looks fantastic. The final invoice was very reasonable and we would definitely recommend them again. Rob and Lucy"
ROB & LUCY HURRELL – MEERSBROOK, S8
"I purchased my house at Beauchief from james six months ago. James showed me the property when it was partly renovated and I fell in love with it. He has sympathetically renovated the house keeping all the lovely features. All the bathroom and kitchen fittings are of a very high standard and since moving in I have not had any problems. I am over the moon with the house and would not hesitate to buy from James again and indeed a couple of my friends are interested in purchasing off him. Thanks, Philippa."
PHILIPPA DIGNAM – BEAUCHIEF, S8
We love our new kitchen extension. It is exactly what we wanted. SDP listened to exactly what we were after and did a fantastic job. Everyone who worked on it was very friendly and polite and worked to high standards. I would definitely recommend them.
Emma Wilkinson – Crookes, S10
We had a fantastic experience with SDP. James and his team knocked through our lounge and kitchen last year, this involved obtaining structural engineer's calculations, knocking through the brickwork, putting in steel support then arranging building regulation sign off. This was finished by 'making good' including plumbing a new radiator, re tiling the floor and re plastering. The work was carried out to the highest standard and from start to finish the process was smooth. What really impressed me was how specific James and his team were with the timeline of events and when they would occur so we could adequately plan ahead and his team are really friendly. We are already planning on using SDP again when we extend our kitchen later this year. I cannot recommend them highly enough!
Michael Parry – Dore
"James, We would just like to say thanks to you and your team for completing the alterations on time and to budget . You kept us informed throughout , the work was to a high standard and the various tradesmen turned up when you said they would. We were very appreciative of the fact that your tidied up after themselves and kept the disruption down to a minimum. Once again, many thanks Michael &Sandra Totley , Sheffield"
MICHAEL & SANDRA – TOTLEY, S17
"After looking around various kitchen design webpages and talking to people, the website for SDP caught our attention because of the bespoke design aspects and the quality of the workmanship. At our initial meeting with James, we were able to explain what it was we were seeking and he was able to advise and make suggestions. This collaborative approach was also taken when we met Steve the kitchen designer. From our first meeting to the completion of the project, continued close communication meant the project ran smoothly and we were aware of what was happening at each stage. James was an excellent project manager, liaising with various trades, electricians, plumbers, plasterers, kitchen fitters, flooring, to ensure the work was done to the agreed timescale and to a high standard and finish. The final result is exactly what we wanted with a few additional ideas from the design team. All of our friends who have visited echo our appreciation of the quality design and workmanship of our new kitchen which we are delighted with. We would highly recommend the work of SDP."
BRYAN & TIM - NORTON LEES, S8
"Having decided to finally go ahead with an extension and major redevelopment to our property, we engaged SDP to undertake the work on the basis of recommendation from other people and we are totally happy with the finished product. The work, a full-width single storey extension with, the existing floor-plan being changed from a separate kitchen/dining room into 1 large open-plan living space, was managed by James brilliantly, with every detail of the plans/schedule being made available to us before the work started. James attended almost every day, keeping us informed of expected progress. The team(s) James employs are professional and helpful. A pleasure having SDP do the work and would happily recommend."
RICHARD & LOUISE BOLTON – MILLHOUSES, S7
We decided that as we were getting older a downstairs toilet would be beneficial. This would be built in the rear of our integral garage. With the front of the garage being extended, with new roof, to allow the continued garaging of our car. Getting planning permission took about 7 weeks. I felt that at least 3 quotations would be required. I had listed our requirements as detailed as possible and identified 3 builders, two local and the third, SDP, I found from a web search. Although SDP were not the lowest quote, we both felt that the way James, the Managing Director dealt with us, was impressive. We went to SDP office to discuss and sign the contract. I had thought of a few queries and tweaks which James accommodated without issue. He also advised us of suppliers they used, for us to choose some of the fitments etc. We were advised of a probable start date and probable duration of the work. Although there was some slippage it did not affect us. The basic building work was done by the team of Ian and his mate Richard. James was on site early most mornings, checking progress and ordering the materials as required. I had not really fully anticipated the level of work required, with lots of sand, bricks, aggregate, timber, and two skips etc. The weather was not always good but it never stopped Ian and Richard, although they were very wet on occasions. Cups of tea seemed to work wonders. James was open to my suggestions and queries although he did suggest on one occasion that I had ‘too much time to think’! Anyway most were accommodated where possible. All the tradesmen were also very professional and competent. Tidying up as they went along. Overall we were happy with the work; in particular the way Ian built false doors to the garage extension for security and in our hallway which really kept dust and disturbance to a minimum. He also built replacement shelves to the rear of the garage. Pricewise I was a little concerned, due to my suggestions and tweaks but it came in ‘on quote’ apart from a couple of items which we asked to be changed. James certainly seems to keep his several active projects, small and large, going with very little impact on ours. We would thoroughly recommend DPS and wish James and his team best wishes for the future.
Mary and John Wilde
"I bought my house a few months ago and needed some work doing. I have never heard about SDP and when I did meet them they gave my a very professional service. James listened to me and was very passionate about the project as just as me. I am delighted with the work that he has done already and look forward for him to work for me in the future. Thanks James. Christine"
CHRISTINE DALEY – TOTLEY, S17
"We were immediately impressed by SDP, because, unlike many similar businesses, there is a project manager, James Clarke, who liaises directly with clients and tradesmen. We felt safe in instructing this company to work for us, because we knew that we could go back to James if there were any problems. However, the job couldn’t have been slicker. The workmen turned up punctually and completed the work on time. They were friendly, polite and caused minimal disruption. I am registered blind and they were sensitive to this throughout, letting me know when and where to be more cautious when moving around in areas where they were working. After the work was complete, James phoned us to check whether we were happy with the work, prior to invoicing us. When I queried one issue which we were unsure about, he came out especially to inspect and ensured me that there was nothing to worry about. We now have a lovely new pavement outside our house; not only is it a bit more flood-proof, but much to our cleaner’s delight, is easier to sweep. My husband and I are currently in the process of requesting quotations for further work by SDP. It doesn’t seem to matter what job needs doing; they have all types of tradesmen: plumbers, carpenters, joiners, decorators, electricians, damp-proof specialists, roofers and people to do other outside work. No more scrolling through endless lists of tradesmen in the Yellow Pages and wondering who is trustworthy. We’ll go to SDP every time. Kind Regards, Sarah Byran."
SARAH BYRAN – HILLSBOROUGH, S6
Here at SDP we like to work with property that comes in all shapes and sizes, from work spaces to places to live, and create buildings where people want to spend their time. That’s why we are passionate about creating beautiful, high quality property for sale or rent.
'Our vision is to establish a brand which is synonymous with luxury, quality and the highest standards of living' - JAMES CLARKE, MANAGING DIRECTOR



