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House extensions have saved countless homes from being considered incompatible with family size or lifestyle. Sometimes when the difference between the right-sized home and the wrong-sized one is a bedroom or a larger kitchen, it makes no sense to move houses, which is monumental. The Victorian, Edwardian, and early 20th Century homes of London and South once catered to a very different population. Now, we have more needs that these homes can’t meet. Single-storey extensions London is the answer to your 21st Century space needs. Whether it is an open plan kitchen/dining area for entertaining or for family time, or an extra bathroom for luxurious indulgence with no interruption, extensions create bespoke spaces for your evolving needs. The types of extension decide how your floor plan will change.

The most basic extension design is the Side Return. It extends the property onto the garden passage on the side between the house and the border wall. Terraced and semi-detached period homes of London feature this strip of land that contributes to an L-shaped garden. Usually, this narrow alleyway is reserved for the bins and discarded old items. Side Return Extensions utilise this largely unused space to expand the kitchen or for other amenities. This design also saves much of your garden space.

It is perhaps Britain’s favourite home extension due to its free-flowing space addition. A Rear Extension builds towards the back garden across the width of the property. It is more natural light-friendly as it faces the garden. Glass bi-fold doors bring in plenty of light and open up the room to the outdoors for al fresco dining or relaxation. This design works well for a single-storey extension and double-storey extension. An open-plan kitchen extension layout with dining and sitting areas benefits from the bright, airy feel and garden views.

The L-shaped formation of joined-up Side and Rear extensions is a Wraparound Extension. It creates a substantial amount of single-storey space. You can include a dining area, a work station, a utility room, and a WC, or plan out one big kitchen and dining area that can accommodate plenty of guests.

Office and lounge – Add vertical partitioning walls to separate sections of one long stretch of Rear space. You can keep the office and lounge separate but connected for a more refined work atmosphere your colleagues will envy.

Guest bedroom – Using a sumptuous daybed or two that double for sleeping to design a dual-purpose guest bedroom allows the occupants to use the space as a quiet reading retreat or a lounge space. If you need a spare bedroom for regular use, you can go for the full bedroom treatment with a full-sized bed, side cupboards, and hidden wardrobe.

Kids’ dining area – A Wraparound extension is ideal for a separate space for children to enjoy their meals when guests come over. The main dining area can sit in the Rear extension, while the kids’ table can go in the Side extension. You can separate the two with a glass door. When you are not entertaining, it can double as a homework table or arts and crafts table.

The secret living room – Make use of the brighter natural light of the garden-facing Rear Extension to design your new living room. If your current living room is not receiving enough sunlight, you can convert it into more suited living spaces instead.

Kitchen extension – A single-storey extension in London usually means the opportunity to expand your kitchen. The modern open-plan kitchen arrangement needs space, and Side Return Extensions, Wraparounds, and Rear Extensions open up spaces for you to get creative. Kitchen islands, trendy stoves, larger work surfaces, bigger appliances, and in-kitchen dining of modern-day kitchens are all possible with extensions.

Mirrored cladding – If you are using a glass exterior for the extension, consider a mirrored aluminium-clad frame around it. It creates more naturally blended aesthetics.

Side Return bathroom – the niche space created by a side extension is also perfect for a bathroom. You can add a shower or even a bathtub depending on available space. Skylights and clerestory windows bring in plenty of light for a more illuminated and modern look.

The single-storey extension falls under permitted development except in the case of a Wraparound extension. However, when attempting anything that goes beyond regulation, you need planning permission. Permitted development rights are only applicable when;

  • Only 50% of the land area around the original house can cover in extensions
  • Extensions are no higher than the highest part of the roof or the eaves any higher than the existing eaves.
  • When the extension comes within 2m of the boundary, the eave height should not exceed 3m.
  • The new addition should not be forward the principal elevation, or when it fronts a highway, the side elevation.
  • There are no raised platforms or verandas.
  • The existing roof of the house must not change.
  • The exterior of the extension is similar in appearance to the rest of the house.
  • Side extensions should not exceed 4m in height and half the width of the original house.
  • Rear extensions should be no more than 4m in height.
  • Rear extensions must not extend 4m beyond the Rear wall of the house if detached, 3m if any other type of property.

Planning application becomes a requirement if you live in a conservation area or a listed building. Your extension also needs building regulations approval. We carry out all our design and build work within guidelines and prepares applications for planning and building requirements.

Single-storey extension cost

The average total build cost may differ from project to project due to size, design, and other factors. A Side Return costs around £35,000, a Rear extension £40,000 upwards, and a Wraparound can cost £55,000 and more in London. We allow for any additional cost that may incur during the finishing stages in your budget to work only within the estimated cost. We also include all professional fees at the onset of the project.

Make a start on your extension project today by requesting your appointment with us.

Don't move. Extend in style

We can save you the hassle that comes with moving not to mention the heavy stamp duty! Adding an extra loft bedroom or enlarging the living kitchen dining space on ground floor is an economical way of transforming your home to suit growing needs. The projects can range from £40-100K depending on your requirements and can be completed within 8-16 weeks.

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How we deliver projects

Our process is simple and divided into two distinct phases with separate contracts: Design and Build. As a client you only commit to one phase at a time depending on what stage of the process you are in. Each phase consists of three stages as described below.

1. Design

This is the kick-off point for your project. We carry out a complete architectural measured survey of the property. This allows us to create accurate CAD design drawings. This is followed by a design meeting to start discussing your ideas in more detail.

2. Planning

At this stage we finalise the designs with you and start preparing planning applications as needed. We place a high priority on ensuring that plans, designs and schedules are all based on a thorough and detailed understanding of planning guidelines. We co-ordinate with local authorities until the decision is made, and the planning approval is secured.

3. Technical

Once the planning consent is secured, we translate the design drawings into more detailed technical drawings for the purposes of building control and construction. This also includes specifications and structural calculations. At this stage, we will also submit to you our ‘no obligation’ quote for the build phase.

4. Pre-build

90% of our clients decide to stick with us after the design phase is completed. Once the build contract is signed, we kick off the process by making sure all the pre-build processes are complete. These include assistance with party wall agreements, Thames Water build over agreement, submitting building control application, and preparing method statements etc as needed. This stage ends with a pre-start meeting with your foreman before the actual build begins.

5. Build

One of our foremen will be dedicated to your project and will be on-site to manage everyday works. Our project managers will be overseeing the works to make sure they are completed to high standards, within your budget and on time. Throughout the process we will keep you updated with the progress and coordinate the works with third parties such as kitchen or flooring suppliers. We will also advise and guide you to choose any suppliers if needed.

6. Handover

As the build draws to finish, we will help to iron out any ‘snags’ to make sure everything is completed to your satisfaction. We will put together all necessary certificates such as gas, electricity and building control completion along with warranties for glazing, boiler etc. At the final completion meeting, we will hand you these documents, together with the keys to your house. Needless to say, you can contact us any time after this, if you want us to look at something.

This is the kick-off point for your project. We carry out a complete architectural measured survey of the property. This allows us to create accurate CAD design drawings. This is followed by a design meeting to start discussing your ideas in more detail.

At this stage we finalise the designs with you and start preparing planning applications as needed. We place a high priority on ensuring that plans, designs and schedules are all based on a thorough and detailed understanding of planning guidelines. We co-ordinate with local authorities until the decision is made, and the planning approval is secured.

Once the planning consent is secured, we translate the design drawings into more detailed technical drawings for the purposes of building control and construction. This also includes specifications and structural calculations. At this stage, we will also submit to you our ‘no obligation’ quote for the build phase.

90% of our clients decide to stick with us after the design phase is completed. Once the build contract is signed, we kick off the process by making sure all the pre-build processes are complete. These include assistance with party wall agreements, Thames Water build over agreement, submitting building control application, and preparing method statements etc as needed. This stage ends with a pre-start meeting with your foreman before the actual build begins.

One of our foremen will be dedicated to your project and will be on-site to manage everyday works. Our project managers will be overseeing the works to make sure they are completed to high standards, within your budget and on time. Throughout the process we will keep you updated with the progress and coordinate the works with third parties such as kitchen or flooring suppliers. We will also advise and guide you to choose any suppliers if needed.

As the build draws to finish, we will help to iron out any ‘snags’ to make sure everything is completed to your satisfaction. We will put together all necessary certificates such as gas, electricity and building control completion along with warranties for glazing, boiler etc. At the final completion meeting, we will hand you these documents, together with the keys to your house. Needless to say, you can contact us any time after this, if you want us to look at something.

Featured Projects

Fulham

Orbain Road SW6 7JZ

This project was completed in 2023 and the approximate budget was £101,000.

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Kitchen Extension in East Sheen

Lambeth

Hetherington Road SW4

We completed this stunning project for our client Angus in Lambeth.

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Teddington

Station Road SW4 7PA

We completed this exciting project for our clients on Station Road, a quaint residential area in the heart of Teddington.

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Leyton

Windsor Road E10

We completed this kitchen extension on Windsor Road, a charming residential street nestled in the heart of Leyton.

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Clapham

Hydethorpe Road SW12 0JF

We did this kitchen extension project for our clients in Hydethorpe Road SW12.

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What Our Clients Say

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Areas we cover

Chiswick

Acton

Balham

Battersea

Chelsea

Clapham

Croydon

Ealing

Earlsfield

Elmbridge

Epsom

Fulham

Hammersmith

Hampton

Hillingdon

Hounslow

Kensington

Kew

Maida Vale

Mortlake

Putney

Richmond

Sheen

Surrey

Teddington

Tooting

Twickenham

Wandsworth

West London

Build a Quote!

Let's get started with building your own bespoke quote for your dream extension. Tell us as much in detail as possible to get most accurate price.

Get Started

Build a Quote!

Let's get started with building your own bespoke quote for your dream extension. Tell us as much in detail as possible to get most accurate price.

Get Started