House Extensions in Brighton, Hove & Sussex
A well-designed extension can completely transform the way you live.
At HAPA Architects, we create thoughtful, beautifully detailed house extensions across Brighton, Hove and Sussex, adding space, light and value while improving how your home functions every day.
Whether you are extending a Victorian terrace in Brighton, reconfiguring a family home in Hove, or enlarging a countryside property in Sussex, we combine creativity with practical expertise to guide you from first ideas through planning and construction.
What We Design
We work on:
- Rear extensions
- Side return extensions
- Wraparound extensions
- Loft conversions
- Kitchen extensions
- Garden room additions
- Two-storey extensions
- Full home reconfigurations
Our Approach
Every home is different. We begin by understanding how you live now, and how you want to live in future.
We carefully consider:
- Natural light
- Flow between rooms
- Storage and practicality
- Relationship to garden
- Privacy
- Materials and character
- Sustainability and energy efficiency
Our aim is always to make the new space feel like it was meant to be there.
Featured Project: Old Rectory Cottage, Barcombe
At Old Rectory Cottage, we removed outdated piecemeal extensions and replaced them with a spacious new kitchen-dining room opening directly to the landscape.
Large sliding glazed doors connect inside and out, while a dramatic oriel window creates a light-filled family room with framed views across the South Downs.
The result is a home transformed through light, circulation and carefully judged contemporary additions.
View Project → Old Rectory Cottage
Featured Project: Timber & Flint Extension
Located within the South Downs National Park, this two-storey extension reconfigured the main living spaces and created a striking contemporary addition using black timber cladding and a flint plinth rooted in the Sussex vernacular.
View Project → Timber & Flint Extension
Planning Permission for Extensions
Many extensions require planning approval or must respond sensitively to neighbouring properties, conservation areas or design constraints.
We manage:
- Planning applications
- Pre-application advice
- Design statements
- Building regulations coordination
- Contractor-ready technical drawings
Why Choose HAPA
- Award-winning Brighton architects
- Design-led but practical solutions
- Experience in urban and rural settings
- Strong planning knowledge
- Sustainable design thinking
- Personal service from senior team members
Planning a House Extension?
Speak to HAPA Architects about your project.