Hampshire House Extensions
Award-winning house extensions across Hampshire
A well-designed extension is one of the most effective investments you can make in your home. At Landmark Design, we create extensions that genuinely transform the way you live — delivering more space, more light, and a home that works harder for your family.
Expert design, exceptional results
From a simple rear kitchen extension to a complex multi-storey addition, every project we take on begins with a deep understanding of your home, your site, and your ambitions. We handle everything: initial feasibility, design development, planning applications, and construction drawings. Our 98% planning success rate reflects not just good design, but a thorough knowledge of what planning authorities across Hampshire expect — and how to exceed those expectations. Whether you are working within Permitted Development rights or need full planning permission, we will guide you through the process from start to finish.
- Rear & Side Return Extensions
- Single & Double Storey Additions
- Kitchen & Living Space Extensions
- Loft Conversions
- Orangeries & Garden Rooms
- Planning Applications & Drawings
Selected house extensions projects
A selection of our work — each project reflects the same rigour, contextual awareness, and attention to detail we bring to every commission.
Frequently asked questions
Start your project in House Extensions
Book a free 45-minute consultation with our team. Pick a time that suits you and tell us a little about what you have in mind — we'll confirm by email within 24 hours.
- Free initial discovery call
- No obligation
- Video or in-studio meeting
Ready to start your project?
Get in touch for a free initial consultation. We'd love to hear about your project.