Welcome to MDSI – a one-stop shop for property development, construction, joinery, carpentry, and acoustics. We are a dedicated team of experts committed to turning your projects into reality and safeguarding your aspirations. Each of our group companies brings its own unique identity and speciality; backed by over 35 years of industry expertise and hundreds of years of combined experience.
We operate with a distinctive approach that sets us apart from many others in our field. Our mission is to transform the way similar companies conduct business.
We provide fixed prices without hidden, unexpected charges—what we commit to is exactly what we deliver. Our clients are kept in the loop throughout every phase of the project, ensuring a seamless transition with consistent site managers and dedicated staff. Moreover, we don’t depend on external contractors; our team is exclusively employed by us, and they are true specialists in their trades.
We specialise in four key areas:
Property Development: We own the sites and build unique homes with expertise that spans from small two-bedroom barn conversions to expansive 5,000+ sqft houses featuring six or seven bedrooms nationwide. Whether using traditional “wet builds” or the latest SIP technology, we consistently construct to the highest standards. Additionally, our established relationship with a PassivHaus certification company ensures our builds meet both our rigorous scheme standards and local council requirements where required.
Builders: We manage and execute projects for clients across the country—ranging from extensions and new home builds to swimming pools and pergolas. Our expertise in complete renovations has transformed properties from the far north of Scotland to the southwest of England. With over 30 years of experience led by our building director and our dedicated team, we bring unparalleled value and craftsmanship to every project.
Joiners & Carpenters: Our bespoke joinery service is designed to meet every need, from SIP panels and staircases to custom kitchens and door casings. Our in-house workshops allow us to manufacture custom elements for diverse environments, including nightclubs, bars, and public buildings. By crafting many elements from scratch, we maintain complete control over the final product, ensuring quality and pride in every piece of work.
Acousticians: As established acousticians, we not only design and build environments—from nightclubs to recording studios—but also create quiet, acoustically refined spaces. Our expertise in soundproofing and acoustic design ensures that our installations effectively reduce unwanted echoes and noise, delivering a truly immersive and controlled auditory experience. As part of this, we are uniquely qualified to build rooms such as cinemas and quiet rooms in our clients’ spaces.