Hey, I’m Steve from DSN+BD! We’re not just another design & build contractor—we’re your partners in turning ideas into reality. With 12 years of experience in London and the southern counties, we take your project from vision to completion, handling everything so you don’t have to stress about a thing.
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5 customer reviews
Andrey Sundiev
Handyman
Super-satisfied with the work that Steve from DSN+BD Construction has done at my house! He was really responsive, and quickly got in touch with me to clarify the job and provide an approximate quote.
Steve kept me in the loop about the timelines to set clear expectations.
On the day of the job, he got in time and fully prepared. Steve was friendly, kind and thorough. He had a genuine interest in not just getting the job done, but doing it well. He offered suggestions for how we might best approach the task, and put the best effort into execution.
I'm really happy with the result, and can certainly recommend Steve and DSN+BD Construction for your domestic work needs!
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Moises Zetina
Steve was such a nice guy! we reached to him for help on the design, build and consultation on our recording studio. Without him we wouldn’t have accomplished such an amazing job with the technical detailing of the floated floor and walls with an outstanding isolation, finish and also quality suppliers that he provided.
sarah withers
Steve was my main point of contact throughout our build and instrumental in making it a very enjoyable experience overall. He is extremely well organized, not missing detail on either the client side or build team. He has a massive knowledge base across all aspects of design and construction and an innate curiosity which makes him a pleasure to work with. He was very accommodating of our desire to use recycled & salvaged materials which often made installation tricky. Steve was very quick to adapt to any changes we made, which happened on more than a few occasions. He works incredibly fast and always delivers. And, he does it with humour and grace. More...
Eleni Papadopoulou
I’ve had the pleasure of collaborating with Steve over the past six years on a variety of Music Studio and Postproduction fit-out projects.
Throughout this time, Steve’s role has been instrumental in the design, project, and construction management of these projects. His expertise and hands-on approach ensured that every aspect of the work was executed to a high standard.
Steve has been invaluable in troubleshooting issues and managing challenges, particularly when faced with tight construction timelines. His ability to solve problems quickly and efficiently has consistently kept our projects on track, and his commitment to the success of each project has been evident from start to finish.
It’s been a privilege working alongside Steve, and I look forward to continuing our collaboration in the future.
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James Greer
I am a small scale residential developer called London Living Spaces Ltd. I started out extending and converting a medium sized terraced house and eventually progressed to converting a 3 storey building into 3 flats.
Steve has been helping me from the very beginning and has provided design consultancy and project management oversight for 6 different private residential extension / conversion developments over the past 12 years. The projects include 27 Fernlea Road, 42 Beasley Street, 58 Arthur Road, 68 Alston Rd, 76 Alston Rd and Lebanon Gardens - all based in south London.
Steve has helped me assess feasibility on these projects and navigate the acquisition of planning permission for each development. He has consulted on the technical detailing generally including the structural systems, water tightness and damp proofing, insulation, roofing system and internal and exterior finishes as well as integration of electrical and plumbing services. Steve helped me vet and select suitable contractors for the various elements of works and helped assess the value of works carried out at each stage so that payments could be made to contractors in line with work completed / materials purchased.
What I liked about Steve and how he works is that Steve is super process driven and made sure that all elements of the build were processed correctly whether this be design changes, statutory permissions or payments to contractors. This gave me great peace of mind that everything was under control and that I was progressing without putting myself and my projects at risk during execution or following completion.
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How can someone tell if their loft is suitable for conversion?
Thinking of a loft conversion? Here’s what you need to check first.
✅ Head Height: Ideally 2.2m+ from floor to ridge. Less? You may need to raise the roof or lower ceilings—both pricey!
✅ Roof Type: Pre-1960s roofs are easier to convert. Post-1960s truss roofs need extra support.
✅ Floor Strength: Loft floors aren’t built for heavy loads—extra joists may be needed.
✅ Access & Stairs: A proper staircase is required, usually placed above the existing one to save space.
✅ Permissions & Regulations: Simple Velux conversions often fall under Permitted Development, while dormers/mansards may need planning approval.
✅ Obstacles: Chimneys, water tanks, and electrics may need relocating.
✅ Light & Ventilation: Windows should be 20% of the floor area to keep things bright and airy.
✅ Costs: Velux conversions are the most affordable. Dormers & mansards cost more due to structural changes.
Want to check if your loft is good to go? Let’s chat.
Run us through the different stages in the loft conversion process - what’s involved?
Loft Conversion: The Journey from Idea to Reality
1️⃣ Consultation & Feasibility – We assess your space, check head height, roof type & layout, and give you a ballpark quote & timeline.
2️⃣ Design & Approvals – Our architects create plans, secure planning permission (if needed), and get Building Regulations approval.
3️⃣ Pre-Construction – We prep the site, order materials, and schedule our expert tradespeople.
4️⃣ Structural Work – We reinforce floors, adjust the roof (if needed), and make the loft watertight.
5️⃣ First Fix – Insulation, electrics, plumbing, and staircase installation begin. Your new space starts taking shape!
6️⃣ Second Fix & Finishing Touches – Walls are plastered & painted, floors are laid, and lighting & fixtures are installed.
7️⃣ Final Inspections & Handover – We ensure everything meets regulations, fix any minor issues, and walk you through your new loft.
8️⃣ Aftercare & Warranty – You get a 12-month defect liability period and a 10-year structural guarantee for total peace of mind.
Ready to transform your loft? Let’s chat.
What do you love most about your job?
I’m passionate about design and construction, but what truly brings it to life is the people I build for. The best part of my job? Meeting new and interesting people every day—it’s what makes every project unique and rewarding.
What inspired you to start your own business?
I’m driven by the desire to deliver the best possible end result—but just as important is making the design and build journey smooth, stress-free, and even enjoyable. My business is all about creating great spaces and great experiences for my clients.
Why should our clients choose you?
Bark clients should choose me because I’m not just a skilled professional - I’m trustworthy, personable, and genuinely care about making the construction process smooth, stress-free, and even enjoyable. I’m here to bring your vision to life with expertise and a personal touch.
Can you provide your services online or remotely? If so, please add details.
Unfortunately, no. In my opinion, to truly understand a project, it’s crucial to visit the site in person. This allows me to assess the site’s unique constraints and challenges firsthand, which is essential for creating a quality design and build that meets your needs and expectations.
Architectural Design Services
DSN+BD provides a full scope of design services including architectural design, structural design through to mechanical and electrical design where required.
All of the designers Steve utilises in his construction projects are highly qualified in their respective fields and can back this up with proof of qualifications and accreditations upon request.
Building Contractor Services
DSN+BD provides a full scope of building contractor services required for domestic extension and conversion works as well as commercial construction and fit-out works.
The sub-contractors that Steve delegates the various building works packages to are highly qualified in their field and have the qualifications and accreditations to demonstrate their expertise. These are available upon request.
Steve employs the services of independent building control services to review construction works in progress and at the point of completion so as to guarantee construction works are to the highest standard and conform with the Building Regulations and British Standards.
