Home Extensions in Surrey and the Home Counties

More space,
without moving house.

Rear, wraparound and double-storey extensions. Loft and basement conversions. We design and build home extensions in Surrey and the Home Counties that give you the room to live, work and entertain better, without leaving the home and neighbourhood you love.

Request My Private Consultation

Explore your Options

 ​

 

 

Why extend or convert?

The space you need is often already there.

An underused loft, side return, garage or basement can become an extra bedroom, a larger kitchen or a calm family living space. As experienced residential builder in Surrey and the Home Counties, we help you assess what is genuinely possible before you make a commitment.

We design around your lifestyle, your property and your budget from the outset. That means your home extensions are beautifully considered, practically planned and realistically costed before work begins.

 

Your options

Three directions to find more room.

Every home has a different opportunity. We assess your garden, roofline, foundations, neighbouring properties and ambitions to recommend the right route for your home extensions in Surrey and the Home Counties.

 

 

Outward

Extensions

Rear, side and double-storey extensions can transform how your home connects to its garden, natural light and living spaces. We create seamless additions that feel part of the original house.

  • Rear extensions
  • Side return extensions
  • Wraparound extensions
  • Double-storey and kitchen extensions

Upward

Loft conversions

A loft conversion can provide a genuine additional floor without sacrificing garden space. We design light-filled rooms with proper access, usable headroom and a finish that belongs with the rest of your home.

  • Dormer conversions
  • Hip-to-gable conversions
  • Mansard conversions
  • L-shaped and roof-light conversions

Downward

Basement conversions

Where planning, garden size or roof restrictions limit other options, a basement can unlock substantial additional space. Our approach to home extensions in Surrey and the Home Counties includes the complex technical work required below ground.

  • New basement excavations
  • Cellar and existing basement conversions
  • Light wells and sunken gardens
  • Home gyms, cinemas and guest suites

​

 

 
 
 
 
 
 
 
 
 
 
 

 

 

 

In focus

Basement conversions: more space without changing the footprint.

Basement conversions are ideal for homeowners who want another storey without losing the garden or altering the roofline. They can create a private guest suite, cinema room, gym, playroom or generous family living area.

They are also technically demanding. Structural engineering, underpinning, waterproofing, drainage and party wall matters all need careful coordination. We manage the process in-house, keeping you informed from the first survey to final handover.

30–40%

Typical additional floor area vs a single loft conversion

0

Garden or
roofline lost

1

Dedicated team managing structure, waterproofing
and finish​

 

 

 

 

 

What's included

Handled in-house, whichever direction you choose.​

—

Feasibility & design

We assess what your property, garden, roof and ground conditions can realistically accommodate, then develop a design that works for your home and budget.

—

Structural engineering

Steelwork, foundations, underpinning and structural alterations are designed, calculated and prepared for building control approval.

—

Planning & party wall

We handle permitted development assessments, planning applications
and party wall agreements, removing unnecessary administration
from your to-do list.

—

Waterproofing & tanking

For basement projects, we specify and install robust structural waterproofing systems designed to current standards and supported by warranty.
 

—

Electrical, plumbing & heating

New services are designed into the project early, so your finished space works as well behind the walls as it does visually.

—

Staircases & access

We plan stairs, landings and circulation carefully, ensuring your new level feels naturally connected rather than added on.

—

Finishes & joinery

From kitchens and bathrooms to bespoke storage, flooring and decoration, we carry the detail through to a complete finish.
 

—

Fixed price, one contract

Our home extensions in Surrey and the Home Counties are delivered through one coordinated contract, with a live cost dashboard and no provisional sums. You approve any change before costs move.

 

 

 

 

How it runs

Five stages, whichever route you take.

01.

Feasibility

We inspect the property and identify the opportunities, constraints and likely approvals needed.

02.

Design

We develop layouts, specifications and structural solutions, with costs considered alongside every key decision.

03.

Approvals

Planning, party wall and building regulations matters are progressed, while your fixed-price contract is finalised.

04.

Construction

Our team coordinates every stage, from groundworks or roof alterations through to services, finishes and joinery.

05.

Handover

We clear snagging, provide relevant certification and warranties, and hand over a space ready to enjoy.

 

 

 

 

A glimpse of the work

Recent extensions & conversions.

Rear extension kitchens, garden-facing glazing, dormer loft bedrooms, side returns, basement gyms and carefully finished guest suites.

[Gallery]

 

 

 

 

Common questions

What clients usually ask before starting.

How much does a house extension cost in Surrey?

The cost of a house extension in Surrey depends on its size, structural requirements, specification, access and whether planning permission is needed. We assess feasibility and design requirements early, then provide a fixed-price contract with a live cost dashboard and no provisional sums.

What type of extension is best for adding space to my home?

The best option depends on your property, garden, roofline, ground conditions and how you want to use the space. Rear and side return extensions suit larger kitchens and living areas, loft conversions add bedrooms without losing garden space, and basement conversions create room where outward or upward expansion is restricted.

How long does it take to build a house extension?

Timescales vary according to the project size, approvals, structural work and finishes. Before construction begins, We develop the design, manage planning and building regulations, and coordinate the programme so you have a clear understanding of the stages and expected completion period.

Do I need planning permission for a house extension in Surrey?

Some home extensions in Surrey can be completed under permitted development rights, while others need full planning permission. Factors include the extension’s size, location, design, previous alterations and whether the property is listed or within a conservation area. The team assesses this and manages planning applications where required.

What is the difference between a single-storey and two-storey extension?

A single-storey extension typically adds ground-floor space, such as a larger kitchen, dining area or family room. A two-storey extension adds space across two floors, often creating both living space downstairs and an additional bedroom or bathroom upstairs. The right choice depends on budget, planning constraints and your household needs.

Can you help with the design and planning of my home extension?

Yes. We provide feasibility advice, layout design, specifications, structural engineering coordination, permitted development assessments, planning applications, building regulations preparation and party wall support. Design decisions are considered alongside costs from the outset.

Can I extend my home to create a larger kitchen and living area?

Yes. Rear extensions, side return extensions and wraparound extensions are popular ways to create open-plan kitchen, dining and living spaces with improved garden access and natural light. The design can include glazing, new services, bespoke joinery, flooring and a fully fitted kitchen.

Can an unused garage be converted into additional living space?

In many cases, yes. A garage conversion can provide a home office, playroom, guest bedroom, utility room or additional living area without extending the property footprint. Feasibility will depend on the garage structure, insulation, damp protection, services, access and relevant planning or building regulations requirements.

How do you make sure a house extension matches the existing property?

A successful extension is designed around the existing house, including its proportions, roofline, materials, natural light and connection to the garden. We coordinate structural alterations, finishes, staircases, glazing, joinery and decoration to ensure the new space feels integrated rather than added on.

Is a house extension a better option than moving to a larger home?

A house extension can be a strong alternative to moving if you like your location but need more room. It may allow you to gain bedrooms, kitchen space or flexible living areas while avoiding the disruption and costs associated with selling, buying and relocating. A feasibility consultation helps determine what your home can accommodate.

 

 

 

 

 

A handful of private design consultations remain open this season.

Let's find out how much space
​your home already has.

Whether you are considering a rear extension, loft, garage or basement conversion, we will give you an honest view of what can be achieved.

As trusted residential builder in Surrey and the Home Counties, we combine design, cost planning and construction under one roof, giving you clarity from day one. Start a conversation about your home extensions in Surrey and the Home Counties, and let's create a home that works harder for you.

Request My Private Consultation