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House Extensions Beautifully designed. Professionally built.

Discuss Your Extension
Create More Space

A home that works better for you.

A thoughtfully designed extension can transform the way you live, giving you the space you need without the upheaval of moving.

At Guy Brumwell, we design and build high-quality house extensions across West Sussex, tailored to your home, your lifestyle and your budget. With over 50 years’ experience, we create beautiful, functional spaces that add value and enhance everyday living.

Discuss Your Extension

Extensions designed around you

Open-plan kitchens

Bright, sociable spaces for modern family living.

Larger family rooms

More space to relax, play and entertain.

Additional bedrooms

Comfortable, light-filled rooms for family or guests.

Home offices

A quiet, productive space to work from home.

Utility rooms

Practical space for modern living.

Guest accommodation

A welcoming space for family and friends.

Improved storage

Smart solutions to reduce clutter.

Garden access

Seamless indoor-outdoor living.

More natural light

Brighter, healthier homes with a greater sense of space.

Single and double-storey extensions

Whether you’re looking for a single-storey rear extension or a larger double-storey addition, we’ll help you unlock the full potential of your home with a design that complements your property and your lifestyle.
View our Extension Projects
Single-storey

A popular way to create more space, ideal for kitchens, family rooms and open-plan living.
Double-storey

Maximise your space with additional rooms upstairs and down, increasing both living space and property value.
Kitchen and dining extensions

Kitchen and dining extensions

Transform the heart of your home with a stunning kitchen or dining extension. We create light-filled open spaces designed for modern living.
Explore kitchen extensions
Kitchen islands
Roof lanterns
Skylights
Glazed doors

Professionally managed from start to finish

We take care of every detail, so you can enjoy a smooth, stress-free building experience.
01

Consultation

Discuss your ideas and requirements.

02

Design

Create a tailored plan for your home.

03

Build

Skilled construction by our trusted team.

04

Completion

Delivered on time, to the highest standard.

Our extension services include

  • Groundworks and foundations
  • Structural alterations and steelwork
  • Brickwork and roofing
  • Doors, windows and glazing
  • Plumbing and electrical work
  • Insulation and plastering
  • Carpentry and joinery
  • Kitchen and bathroom installation
  • Flooring, decorating and finishing
  • Patios and landscaping

An extension that belongs

We design and build extensions that feel like a natural part of your home, carefully matching materials, proportions and finishes so the old and new sit together seamlessly.
From period properties to modern homes, we ensure every detail is considered, creating a space that enhances your home for years to come.
See extensions projects

Start planning your house extension

Talk to our friendly team about your ideas and get expert advice.
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Request a free quote

Let's build something exceptional together.

Tell us about your project and we’ll be in touch to arrange a free, no-obligation consultation.