Sustainable Homes & Low-Energy Architecture

Sustainability should feel effortless, not technical.

 

At HAPA Architects, we design homes that are beautiful, comfortable and energy efficient, reducing running costs while improving wellbeing and long-term resilience.

 

We work across Brighton, Sussex and the South East on new homes, renovations and extensions with sustainability embedded from the outset.

Black Timber House
PV's on roof at Fairview

Our Sustainable Design Principles

We consider:


  • Passive solar design
  • Excellent insulation levels
  • Airtightness
  • Natural daylighting
  • Cross ventilation
  • Low-carbon heating systems
  • Durable natural materials
  • Reduced embodied carbon
  • Renewable energy integration

Featured Project: Black Timber House

Black Timber House in Rodmell is a double RIBA South East award-winning eco home set within the South Downs National Park.

The house achieved an EPC A rating through:

  • Air Source Heat Pump
  • MVHR ventilation
  • High insulation levels
  • PV solar panels
  • Thermal mass floors
  • Passive solar design

Wrapped in charred English larch cladding, it demonstrates that sustainable homes can be both high performing and architecturally striking.

View Project → Black Timber House

Featured Project: Fairview, Lewes

Fairview achieved an exceptional EPC A 104A rating.

Built on reused foundations, the house combines:

  • 9kWp solar array
  • Battery storage
  • ASHP
  • MVHR
  • Underfloor heating
  • Very low U-values

A calm, contemporary home with minimal environmental impact.

View Project → Fairview, Lewes

Fairview, house, lewes, hapa, solar panels

Sustainable Renovations

The greenest building is often the one already standing.

We also help homeowners improve existing homes through:

  • Fabric upgrades
  • Sensitive insulation
  • Window strategy
  • Heating modernisation
  • Layout improvements reducing energy demand

Why Choose HAPA

  • Proven low-energy project experience
  • Design-led sustainability
  • Practical, buildable solutions
  • Beautiful natural materials
  • Future-focused homes

Thinking About a Sustainable Home?

Talk to HAPA Architects about low-energy design.

HAPA Architects
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