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House Extensions Near You Designed Around Modern Living.

Decor Construction Group delivers home extensions in Caterham for homeowners looking to expand and improve their property without the need to move. Whether you want a larger kitchen, a more open-plan living area, an extra room or a full reconfiguration of your ground floor space, our extension builders create extensions that improve daily living while adding long-term value to your home.

As experienced extension contractors in Caterham, we manage every stage with care, from the initial consultation through to completion, with a strong focus on workmanship, structural quality, practical design and a clean, polished result. Looking for extension builders near you? We work across South London and surrounding areas, including Coulsdon, Clapham, Banstead, Ashtead, Wimbledon and Sutton.

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Tailored Extension Design

We plan every home extension around your existing property, the available space, and how you want the finished layout to work.

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End-to-End Project Management

From groundwork and structural works to final finishes, we manage the full process to keep your project organised and progressing smoothly.

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Built for Everyday Living

We create extensions that not only add space but also improve flow, comfort, and practicality throughout the home.

Home extension builders serving Caterham and surrounding areas

Extensions

Types Of House Extensions

2 bed homes

2-bed Homes

Ideal for maximising space without major structural changes:

  • Loft Conversion (Velux or Small Dormer) – Adds an extra bedroom or office with minimal disruption
  • Single Storey Rear Extension – Expands kitchen or living space
  • Garage Conversion – Transforms unused space into a functional room
  • Side Return Extension (terraced homes) – Utilises narrow side space to open up the ground floor

2 bed homes

3-bed Homes

Great for growing families needing more living and bedroom space:

  • Dormer Loft Conversion – Creates a spacious additional bedroom with headroom
  • Wrap-Around Extension – Combines rear and side return for a large open-plan layout
  • Double Storey Rear Extension – Adds space both upstairs and downstairs
  • Side Extension (if space allows) – Increases overall footprint of the home

2 bed homes

4-bed Homes

Suitable for larger upgrades and long-term living:

  • Mansard Loft Conversion – Maximises loft space with a full additional storey feel
  • Double Storey Extensions – Significant increase in living and bedroom space
  • Over-Garage Extension – Makes use of existing structure to add rooms above
  • Annex Potential – Ideal for multi-generational living or guest accommodation

2 bed homes

5-bed Homes

Best suited for high-end, large-scale transformations:

  • Basement Extension – Adds substantial living space without altering exterior footprint
  • Large Rear & Double Storey Extensions – Creates expansive, luxury living areas
  • Annex or Outbuilding – Perfect for independent living spaces or home offices
  • Complex Roof Conversions (multiple dormers or mansard) – Fully optimises roof space

Built Around Your Property

Designed for Space, Flow, and Lasting Value by Trusted Extension Builders

A well-designed home extension should do more than increase square footage. It should improve the way your home functions, enhance the layout and create a finished space that feels naturally connected to the rest of the property.
  • Tailored layouts designed around your lifestyle.
  • Seamless integration with the existing home.
  • Practical spaces that support modern living.
  • Careful construction with attention to every detail.
Whether you are extending to create a larger kitchen-diner, a brighter family room, or additional functional space, our extension builders deliver home extensions in Caterham with clear planning, dependable management and a consistently high standard of workmanship from start to finish.

Thinking About Extending Your Home?

Speak with Decor Construction Group, your local extension contractors, for expert advice and a tailored quotation for your home extension project in Caterham and South London.
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Benefits of a Home Extension for Your Caterham Property

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A professionally built home extension is one of the most effective ways to improve how your home looks, feels, and performs. It lets you unlock more usable space while keeping the character of your existing property and avoiding the disruption of relocating.
  • Creates extra living space without moving home.
  • Ideal for kitchens, dining areas, family rooms, offices, or utility spaces.
  • Can improve layout, light, and day-to-day functionality.
  • Adds value and appeal to the property.
  • Designed to blend with the style of the existing home.
  • Delivered with quality materials and careful workmanship.
Whether you are planning a rear extension, side return, or a larger structural addition, our extension contractors in Caterham approach every project with the same attention to detail, careful coordination, and commitment to a high standard of workmanship.

Testimonials

What Clients saying about us

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“Our front yard needed a serious upgrade and the new driveway looks brilliant. They worked fast but did not cut any corners on the final finish. It really improves the kerb appeal of our entire property.”

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Emma Wright

Property Developer

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“They completely transformed our old property with a high-end refurbishment that feels incredibly special. The builders kept the site tidy and were always upfront about the schedule. I am absolutely thrilled with the final result.”
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James Collins

Homeowner in Clapham

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“We needed an extra bedroom and the loft conversion they delivered is exactly what we hoped for. The tradesmen were polite and finished the job right on time without any hidden costs. It feels like a brand new house now.”
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Michael Brown

Private Landlord

Need Help?

Frequently Asked Questions

What Types Of Extensions Do You Build in Caterham?
We build rear extensions, side return extensions, wrap-around extensions, double storey extensions and larger structural extensions, tailored to your property and the way you want to use the new space. The right option depends on your layout, available space and your goals for the project.
Some extensions can be built under permitted development, so full planning permission may not be needed. Permission is more likely to be required if the extension exceeds size limits, the property is in a conservation area, or it is listed or otherwise restricted. We advise you on the requirements at the planning and design stage.
The timeline depends on the type, size, and complexity of the extension. After the initial consultation and planning stage, we give you a clear programme so you know what to expect.
In many cases, yes. It depends on the scope of the work and which parts of the home are affected. We plan the project to keep disruption to a minimum and will discuss this with you at the start.
A well-designed extension can add value and appeal to a property by increasing living space and improving the layout. The amount depends on your property, the location, and the quality of the finish.
A home extension can create a larger kitchen-diner, a family room, a home office, an extra bedroom, a utility room or an annex, depending on your needs and the space available.

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