Create more space, improve your home’s layout and make your property work better for daily life. Torwood Interiors designs and builds bespoke house extensions in South London and Surrey, with a clear focus on design, quality construction and project management from the first meeting through to completion.
The same principles apply to house extensions UK wide, whether the work is in London, Surrey or further afield.
Whether you are considering a single-storey rear extension, side return extension, wrap-around extension or double-storey addition, our team can help turn your existing property into a more practical and enjoyable home.
For South London extensions, we can help with larger kitchens, open-plan family rooms, extra bedrooms, home offices and better links to the garden. Our house extensions are planned around your property, your lifestyle and your long-term needs.
House Extension Builders South London
As experienced house extension builders in South London, we understand that extending a property is about more than adding floor space.
A good extension needs to work with the existing building, improve the way the rooms connect and feel like a natural part of the original home.
South London includes Victorian and Edwardian terraces, semi-detached houses and detached family homes. Many of these properties have generous gardens or side spaces, but layouts that no longer suit modern life.
A carefully planned extension can create:
- A larger open-plan kitchen and dining area.
- More practical family living space.
- A dedicated home office.
- An additional bedroom or guest room.
- Improved storage and utility space.
- Better access to the garden.
- More natural light.
- A stronger link between indoor and outdoor spaces.
At Torwood Interiors, we look at both the build and the finished result, helping create additional space that looks right, feels right and works well every day.
House Extension Company South London
Choosing the right house extension company in South London can make a major difference to both the process and the final result.
An extension can involve design work, planning permission, permitted development rules, structural calculations, Building Regulations, Building Control, specialist trades and several stages of construction.
Our approach is built around clear communication and joined-up project management.
As extension builders London homeowners can trust, we keep the process organised from start to finish.
We work with architects, interior designers and structural specialists where needed. This helps bring each part of the project together and keeps the build organised.
From the first scope and quotation through to construction and interior finishing, we aim to provide a clear route from your original idea to your completed extension.
Types of House Extensions We Build
Different homes need different extension solutions. The right option depends on the existing layout, available space, planning rules and how you want to use the new area.
Single-Storey House Extensions
Single-storey extensions are one of the most popular ways to create more living space without extending the upper floors.
A rear extension can brighten up a dark or separated ground floor. It can create a kitchen-diner, family room, or open living area.
Large glazed openings, bifold doors, sliding doors and rooflights can bring in more natural light while creating a stronger link with the garden.
Our single-storey extensions can be designed around:
- Kitchen and dining areas.
- Open-plan family rooms.
- Utility rooms.
- Home offices.
- Additional storage.
- Garden access.
- Bespoke joinery.
- Modern heating and lighting.
The result is additional space that feels integrated with the original home rather than simply added on.
Rear House Extensions
A rear extension can make especially effective use of garden-facing space.
For homeowners who want a larger kitchen, family room or entertaining area, a rear extension can provide the chance to rethink the ground-floor layout.
A good rear extension can create an open kitchen, dining area, and living space. It can have large windows or bifold doors that open directly into the garden.
This can make everyday living more flexible while creating a natural indoor-outdoor link.
Side Return Extensions
Side return extensions are particularly suited to many Victorian and Edwardian terraced houses found across London.
These homes often have a narrow passage or unused strip alongside the rear section of the house. Extending into this side return can increase the width of the ground floor and create a much more practical layout.
A side return extension can provide space for:
- A wider kitchen
- A kitchen island
- A dining area
- Additional storage
- A utility area
- An open-plan family space
With carefully placed rooflights or glazing, a side return can also help improve natural light within the existing property.
Wrap-Around House Extensions
A wrap-around extension combines a rear extension with a side return to create a larger change to the ground floor.
This can be an effective solution when homeowners want to rethink how the kitchen, dining and living areas work together.
Wrap-around extensions can create large open spaces. They also help use parts of the property that were not used much before.
They are especially useful where the goal is to create a modern kitchen-diner with a strong connection to the garden.
Double-Storey House Extensions
When more space is needed on more than one floor, a double-storey extension can provide significantly more usable space.
The ground floor could hold a larger kitchen and family living area, while the upper floor could add an extra bedroom, bathroom, home office or other room.
Double-storey extensions need careful attention to structural design, roof layout, neighbouring properties, planning rules and Building Regulations.
We coordinate the build with the right professionals to help make sure the project is delivered correctly from foundations through to final finishes.
We also work on double storey house extensions Surrey homeowners often need when one level is not enough.
Which Extension Suits Your Home?
Start with the problem you want to solve. A rear extension adds depth to the back of the house. A side return extension fills the narrow strip beside it and widens the kitchen. A wrap-around extension combines the two, and a double-storey extension adds rooms upstairs as well as downstairs.
The shape of your plot, the position of neighbouring properties and your planning position usually decide between them, so we talk these through at the first visit. In many house extensions and lofts London projects, the best answer depends on whether the extra space should come from the ground floor or the roof. If the space you need is in the roof, see our loft conversions.
Kitchen Extensions in South London and Surrey
For many homeowners considering house extensions in South London, the kitchen is the main reason for extending.
A kitchen extension can completely change how homeowners use their space. Instead of a small, enclosed kitchen, you can create a connected space for cooking, dining, relaxing and entertaining.
A modern kitchen extension can incorporate:
- Open-plan kitchen layouts
- Kitchen islands
- Kitchen-diners
- Breakfast bars
- Rooflights
- Bifold doors
- Sliding doors
- Bespoke storage
- Utility areas
- Improved garden access
- Modern lighting
- Underfloor heating
Where appropriate, we can also combine the extension with internal remodelling and structural changes so the existing and new areas work together as one cohesive space.
We create kitchen extensions in South London and Surrey. These range from small rear additions to full-width extensions that include the old dining room. Getting it right starts with the structure. The new opening, steelwork, roof, drainage, and services are planned first. No fitting begins until everything is worked out.
Planning Permission, Permitted Development and Building Regulations
Planning and compliance are important parts of any house extension project.
Depending on the property and proposed design, an extension may require planning permission or may fall within permitted development rights.
The applicable requirements can depend on factors such as:
- The size and height of the extension
- The existing property
- Previous extensions
- The location of the property
- The proximity of boundaries
- The proposed design
- Whether the property is within a conservation area
- Any additional planning restrictions
Planning permission and Building Regulations are separate matters. Even where planning permission is not required, the construction may still need to meet Building Regulations.
Where required, projects can involve architectural drawings, planning applications, structural calculations, Building Control and input from a structural engineer.
Our role is to help coordinate the construction side of the project and work with the right professionals so these requirements are properly considered.
Design and Build House Extensions
A successful extension begins long before construction starts. Our design and build approach focuses on understanding how you want to use your home before work begins.
We consider the existing property, proposed layout, structural needs, finishes and practical requirements so the finished extension is designed around your lifestyle.
This can include coordination with:
- Architects
- Interior designers
- Structural engineers
- Building Control
- Specialist contractors
- Kitchen suppliers
- Bespoke joinery specialists
By coordinating these elements, we aim to create a smoother construction process and cut delays or mix-ups.
Our House Extension Process
1. Initial Consultation
We begin by understanding your property, your ideas and what you want to achieve.
Whether you already have architectural plans or are still exploring your options, we can discuss the possible scope of your house extension and the type of space you want to create.
2. Property Review and Project Brief
We review the existing Property Refurbishment and discuss the proposed works.
This is where we consider your preferred layout, kitchen needs, living space, bedrooms, bathrooms, storage, garden connection and other priorities.
3. Design, Planning and Structural Requirements
Where required, architectural design, planning permission, permitted development checks and structural calculations are completed by the right professionals.
We can work alongside your architect and structural engineer to help coordinate the construction requirements.
4. Detailed Quotation and Programme
Once the scope and specification are properly developed, we establish the construction requirements, quotation and project programme.
Clear information at this stage helps everyone grasp what is included before work begins.
5. Construction and Project Management
During construction, we coordinate the work on site and manage the different stages of the build.
This can include foundations, structural alterations, walls, roofing, insulation, windows, doors, electrical work, plumbing, plastering and other construction tasks.
Communication stays important throughout the project so you understand progress and any decisions that need to be made.
6. Interior Finishing and Handover
The final stage brings the extension together.
We focus on the details that make your new space feel complete. This includes flooring, decorating, kitchen installation, bespoke joinery, lighting, and other interior finishes.
We then carry out final checks and snagging before handover.
What Affects the Cost of a House Extension?
No single price exists for a house extension, because every project is different. The main factors are the size of the extension, whether it is one storey or two, the ground conditions and foundations, the structural work needed to open up the existing house, how many services such as drainage, gas and electrics must be moved, and the level of finish inside.
With older houses, issues can also appear once walls and floors are opened up, which is why we recommend allowing a contingency. We provide a written quote after seeing the property, so you know what is included before work starts.
House Extensions Designed Around Your Existing Home
The best extension is not always the biggest one.
The one that makes your property work better.
For a Victorian terrace, this could mean adding a side return. This would widen the kitchen and make it a brighter kitchen-diner.
For a semi-detached family home, it could mean a rear extension that creates a larger open-plan family space.
For a property that needs more accommodation, a double-storey extension could provide additional bedrooms upstairs while changing the ground floor.
Every project needs a different solution.
Our goal is to understand the current layout, available space, and your lifestyle. This will help us decide how the extension should work.
From Extension Construction to Complete Interior
An extension should not feel like a separate building attached to your home.
The internal finishes are just as important as the structure.
Depending on the project, we can coordinate elements including:
- Kitchen installation
- Flooring
- Electrical work
- Plumbing
- Heating
- Underfloor heating
- Lighting
- Plastering
- Decorating
- Bespoke joinery
- Internal doors
- Storage solutions
This approach allows the newly built space to connect naturally with the existing property.
House Extensions Across South London and Surrey
Torwood Interiors offers building and renovation services in South London and Surrey. They have experience with many types of homes.
Our service area includes locations such as:
- Purley
- Croydon
- Caterham
- Richmond
- St Margarets
- Wimbledon
- Wandsworth
- Streatham
- Dulwich
- Surrounding areas of South London
- Surrey and surrounding areas
We are based in Purley. We know the housing in Croydon, Sutton, Caterham, and nearby Surrey well. This includes Victorian and Edwardian terraces, as well as interwar semis. If you are looking for house extensions in a specific area, see our pages for Croydon, Purley and Caterham and Surrey.
If you are thinking about house extensions in South London and are not sure if we cover your area, please contact us. Share your postcode and project details.
Why Choose Torwood Interiors for Your House Extension?
Your extension is a significant investment, so choosing the right construction team matters.
Torwood Interiors combines building expertise with a focus on communication, craftsmanship and project coordination.
Homeowners choose us for:
- Experienced house extension construction
- South London and Surrey coverage
- A coordinated design and build approach
- Clear project communication
- Professional project management
- Coordination with architects and structural engineers
- Quality craftsmanship
- Attention to detail
- Interior finishing
- Bespoke solutions for individual properties
- Experience with period and modern homes
We do not simply focus on constructing the extra space. We consider how the completed extension will function as part of your home.
Real Torwood Extension and Renovation Projects
Our extension and renovation work shows how new space can be combined with wider improvements to create a more cohesive home.
From side return extensions and kitchen transformations to larger renovation projects, our approach focuses on practical layouts, quality construction and carefully considered finishes.
We have projects in South London and Surrey. These areas include Purley, Caterham, Richmond, and St Margarets.
Where an extension forms part of a larger refurbishment, we can also coordinate related structural changes and interior works to help ensure the finished property works as a complete space.
Discuss Your House Extension Project
Thinking about extending your home?
Whether you are considering a single-storey extension, double-storey extension, rear extension, side return or wrap-around extension, the first step is understanding what you want to achieve.
Please share details about your property, your location, and the additional space you want to create.
Our team can talk about your needs. We will help you understand the next steps to take your project from an idea to construction.
House Extension FAQs
Q1. Do I need planning permission for a house extension in South London?
Ans: Not every extension needs a full planning application. Some projects may qualify under permitted development rights, provided they meet the relevant conditions and limits. Other projects will need planning permission. The requirements depend on the property and proposed development.
Q2. How much do house extensions cost in South London?
Ans: The cost of a house extension depends on its size, design, structural needs, access, materials, fixtures, fittings and level of interior finishing. A single-storey rear extension will have different requirements from a double-storey or wrap-around extension. We can provide a detailed quotation only once we properly establish the project scope.
Q3. What is the best type of extension for a Victorian house?
Ans: Victorian homes can often benefit from side return, rear or wrap-around extensions. A side return can make use of an underused strip beside the existing kitchen, while a rear extension can create extra kitchen and family space. The most suitable solution depends on the property’s layout, garden, planning position and your requirements.
Q4. What is a side return extension?
Ans: A side return extension uses the often-underused space alongside the rear part of a property. Particularly common with Victorian and Edwardian terraced houses, this can help create a wider kitchen, dining, or open-plan living area.
Q5. What is a wrap-around extension?
Ans: A wrap-around extension combines a rear extension with a side return. This creates a larger ground-floor extension and can allow homeowners to rethink the relationship between the kitchen, dining, living and garden areas.
Q6. Can you build a kitchen extension?
Ans: Yes. Kitchen extensions are one of the most popular forms of home extension. The extra space can fit a bigger kitchen, an island, a dining area, and a utility space. It also allows for better access to the garden with bifold or sliding doors.
Q7. Do house extensions need Building Regulations approval?
Ans: Building Regulations are separate from planning permission and apply to many extension projects. The requirements relate to areas such as structural safety, insulation, ventilation, drainage, fire safety and other parts of construction. The specific requirements depend on the project.
Q8. Can you work with my architect and structural engineer?
Ans: Yes. Torwood Interiors can work alongside architects, interior designers and structural engineers to help coordinate the construction stage and deliver the intended design and specification.
Q9. How long does a house extension take to build?
Ans: The construction time depends on the size and complexity of the extension, planning and approval requirements, structural work, materials and interior specification. A team can establish a realistic programme once they develop the scope and drawings.
Q10. Do you build home extensions across South London and Surrey?
Ans: Yes. Torwood Interiors offers house extension, renovation, and refurbishment services in South London and Surrey. This includes areas like Purley, Croydon, Caterham, Richmond, and St Margarets.
Q11. Can you combine an extension with a full home renovation?
Ans: Yes. A house extension can be combined with internal remodelling, structural changes, kitchen installation, flooring, heating, bespoke joinery and other refurbishment works where required. This can create a more cohesive result across the existing and newly extended areas of your home.