Kitchen Extensions; A Guide To Your Kitchen Extension

Beautiful kitchen extension in London

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Are you looking to create more space in your home while adding value to your property? A kitchen extension might be just what you need! With some careful planning and consideration, you can turn your existing space into a dream kitchen with plenty of natural light and dining space.

Before you begin your project, you should become acquainted with the local building regulations and planning consent requirements. A single-storey rear extension or side return extension can often be completed under permitted development rights, which means you won’t need planning permission. You will, however, require building approval from local building control and may be required to serve a party wall notice.

Consider the type of new space you want to create when planning your kitchen extension. Do you want a dining room, extend your existing kitchen, or a kitchen diner? Consider using roof lights, glazed doors, and sliding doors to let in more light and connect with any outdoor space you have. Consider the kitchen layout as well, including whether you want a breakfast bar or a kitchen unit.

A kitchen extension project can be an exciting and rewarding experience that transforms your existing area into a lovely and functional living space. You can have your kitchen with enough space, a well-designed interior layout, and plenty of natural light.

In this article, we’ll cover everything you need to know to plan and execute a successful kitchen extension plan, from budgeting to design considerations and construction tips. So, whether you’re thinking about adding an extension or you’re ready to start building, keep reading to learn everything you need to know!

How do I start planning a kitchen extension?

If you’re thinking about adding a kitchen extension, there are a few things you should keep in mind to ensure the project goes smoothly. Kitchen extension planning necessitates careful consideration of your existing area or desired new space, as well as the necessary building codes and planning permissions. Here are a few pointers to get you started on your kitchen extension project:

  • Determine whether your project is permitted development or needs planning permission. Single-story rear extensions are usually permitted development, but it’s always a good idea to double-check with your local planning department.
  • Consider the function of your kitchen extensions. Are you looking for more living space, a dining area, or a kitchen diner? Consider how much floor space you require and what type of interior layout would be most suitable for you.
  • When designing your kitchen extension, consider natural light. Roof lights, glazed doors, and patio doors can help add light, while an exposed brick wall or a roof lantern can add character and interest.
  • Take into account the cost of your extension project. Consult with a kitchen designer or a kitchen company to get an idea of the costs involved.
  • Plan ahead of time and ensure that you have all of the necessary building regulations and planning permission in place before building work can begin. If your extension involves work on a shared wall, you may also need to issue party wall agreements.
  • Make sure that your new kitchen extension is tailored to your specific requirements. Consider the layout of your kitchen, whether you want a breakfast bar or a kitchen island, and whether you require a utility room.
  • Don’t overlook the outside area. Consider how your new addition will integrate with your existing garden space and whether you require outdoor access from your kitchen.

By following these guidelines, you can ensure that your project takes centre stage in creating your dream kitchen as well as multi-purpose living and dining areas.

Do I need an architect for a kitchen extension?

No statute requires architects. That’s your choice. Some have done very important work – including house remodelling without an architect’s help. Others hire one for minor tasks, for instance renovating bathrooms and kitchen cabinets. It’s essential to assess how much you can do yourself and decide whether an architect can offer extra benefits.

An architect will help you get the most out of your space and maximise wall space or even open-plan space. In addition, they will ensure you are aligned with any regulations.

All in all, the choice is yours. For larger kitchen extension projects, it makes sense. For small projects, such as knocking through to a new dining area, you may get away with doing it yourself.

Do I need a builder or a contractor for a kitchen extension?

Yes, most definitely! A builder or contractor is essential to successfully completing your kitchen extensions. They can provide expert advice on design, construction, and materials required for the project. In addition, they can provide the necessary labour needed to complete your kitchen diner extension in a timely and efficient manner. Make sure to select an experienced builder that you trust and can communicate effectively with so that your expectations are met, and the job is done right!

Need a good builder for your kitchen extension? Bilt can help!

Set a timeline

After your builder has arranged your delivery time contact your kitchen designer. A typical single storey extension with a kitchen extension could take around 20-25 weeks. But if going for something more extravagant, like a contemporary glass extension, you could be looking at 30-35 weeks, depending on the lead time for the glass!

The lead time on your cabinets can be up to about 12 weeks. A couple of companies may require that you have an otherwise finished room – including floor, electric and piping and even finishes installed before the project, so it pays a bit of planning and has a precise schedule in place.

Do you need planning permission for a kitchen extension?

If you work under permitted development rules, you won’t need planning permission. It’s always best to do your research beforehand to check whether you need planning approval or not.

Permitted development of rear extensions

Permitted development rear extension refers to the extension of a residential property at the rear of the house that does not require planning permission from the local council as long as it meets specific criteria set out by the government’s developmental approval rights.

These criteria include size, height, and proximity to neighbouring properties. Homeowners can use permitted development rights to extend their homes without going through the full planning application process, saving time and money. However, before beginning work, it is important to verify with the local council to ensure that the proposed extension meets the developmental approval criteria.

How much is a kitchen extension UK in 2023?


The cost of a kitchen extension in London can vary greatly depending on several factors, including the extension’s size, type, quality of materials used, and location. A side extension can cost between £30,000 and £100,000 in the rough. A new extension with a multi-purpose space, contemporary design, and pitched roof, on the other hand, can cost more than £150,000.

In 2023 it is wise to budget to between £2,500 – £3,000 per square metre for a new kitchen extension.

If you are looking at refurbishing an existing space, then you can reduce your budget to around £1,750/m2.

These costs are guides only and ultimately, it depends on the design, consultant fees, the finishes you choose, glazing choices, VAT and the type of kitchen.

To get an idea of the cost of a kitchen extension in London it’s a good idea to get quotes from several different builders and architects.

Plan carefully to avoid any budget surprises.

Things to consider when designing a kitchen

When designing a kitchen, there are several important factors to consider:

  • Available Space: The first thing to consider is the amount of existing space you have in your home. Determine whether you need to extend the kitchen or use the existing room to create a new space.
  • Natural Light: Natural light is essential to create a bright and inviting kitchen. Consider how you can maximize the amount of natural light in the room, such as adding roof lights or roof lantern, glazed doors or patio doors.
  • Planning Permission: If you are planning a kitchen extension, you will need to check if you require planning permission or if it falls under developmental approval rights. You will also need to ensure that you comply with building regulations and obtain building approval from building control.
  • Dining or living space: A kitchen is often the heart of the home, so it is important to consider how it will be used as a living and dining area space. Think about the dining table, breakfast bar, dining area or kitchen island you might want to include.
  • Kitchen Designer: Consider hiring a professional kitchen designer to help you plan the layout, determine the structural elements, and design the overall new contemporary extension.
  • Kitchen Extension Cost: It is essential to consider the cost of the kitchen extension and whether it is within your budget. Plan ahead and consider different kitchen extensions ideas such as a single storey rear extension, side return extension or wraparound kitchen extension to maximize the floor space and outdoor space.

What are 2 most important things to consider when designing a kitchen?

The kitchen layout and the amount of available extra space are two important factors to consider when designing a kitchen.

The design should be practical and functional, with easy movement and access to appliances, storage, and work surfaces. The available space should be large enough to accommodate the desired kitchen features and needs, such as storage, work areas, and seating. Other factors to consider include the kitchen’s style and aesthetics, lighting, and ventilation.

What are the kitchen trends for 2023?

A popular trend in kitchen design for 2023 is to create new living and dining spaces that allow for more natural light and connections to outdoor spaces. This trend also emphasises the use of natural materials, the use of bold colours, and the incorporation of smart kitchen technology. Warmer tones and bold pops of colour are replacing monochromatic, Scandinavian-style minimalism or white and grey farmhouse-style kitchens.

Check out this website for kitchen extension ideas that may inspire your own kitchen renovation project.

Holloways of Ludlow

Sustainable Kitchens

Higham Furniture

Kitchen extensions and party wall act

If you intend to build a kitchen extension that involves work on or near a party wall (a wall shared with another property), you must take the Party Wall Act into account. This law governs construction projects that affect shared walls, boundaries, and structures between properties.

The Party Wall Act requires you to notify your neighbours of your building plans and obtain their approval before beginning any work. This is to ensure that the work does not cause damage to their property or jeopardise the party wall’s safety and stability.

It is recommended that you consult with a party wall surveyor if your kitchen extension involves work on or near a party wall. They can assist you in navigating the requirements of the Party Wall Act and ensuring that you are following the proper procedures to avoid any potential disputes with your neighbours.

What building regulations approval will need for a kitchen extension?

Building regulations approval is usually required when planning a kitchen extension. This includes ensuring that the extension’s design and construction meet specific safety, health, and environmental standards.

Structural stability

The extension must be structurally sound and capable of withstanding a wide range of loads and weather conditions.

Fire protection

Adequate fire protection, such as smoke alarms, fire doors, and fire-resistant materials, must be included in the extension.


Enough ventilation is required to ensure good air quality and prevent condensation.

Drainage and plumbing

A proper drainage and plumbing system, including adequate waste disposal and water supply, is required for the extension.

Electrical safety

The extension must comply with electrical safety standards and include proper wiring, sockets, and light fixtures.


The extension must have adequate insulation to prevent heat loss and ensure energy efficiency.


The extension must be wheelchair accessible, with appropriate door widths and wheelchair access.

To ensure that your kitchen extension meets all requirements, work with a professional builder or architect who is familiar with building codes.

What should you not do when planning a kitchen?

Here are some things to avoid when designing a kitchen:

Rushing into it: Take your time to plan and research before starting any work.

Overlooking the workflow: The kitchen should be designed so that work flows smoothly from the refrigerator to the washbasin, to the stove, and back to the refrigerator.

Neglecting storage: Having enough storage space in the kitchen is essential for keeping it organised and clutter-free.

Forgetting about lighting: Because lighting is essential for functionality and ambience, it is critical to plan for adequate natural and artificial light sources.

Ignoring ventilation: Proper ventilation is required to maintain good air quality and prevent moisture and odour buildup.

Being overly trendy: Avoid selecting styles and materials that are overly trendy and will quickly become outdated. Choose timeless designs that will last a long time.

Cutting corners on quality: Invest in high-quality materials and appliances that will last longer, even if they are more expensive upfront.

Failure to take safety into account: Ensure that the kitchen design incorporates safety features such as non-slip flooring and proper appliance and outlet placement.

Overcrowding: Make sure there is enough space in the kitchen to move around and work comfortably.

Failure to hire professionals: It is critical to work with experienced professionals, such as kitchen designers and contractors, to ensure that the project is completed correctly and in accordance with the laws.

Beautiful kitchen extension in London

When designing a kitchen, what comes first?

Here are important steps to consider when designing a kitchen:

  1. Assess your needs and goals: The first step is to determine what you want to achieve with your kitchen design. Consider your lifestyle, cooking habits, and storage needs. Do you need more counter space, storage, or a larger cooking area? This will help you create a plan that meets your specific needs.
  2. Establish a budget: Knowing how much you can afford to spend on your kitchen remodel is essential. Set a realistic budget and be sure to factor in the cost of materials, appliances, labor, and any additional expenses such as permits or design fees.
  3. Plan your layout: Once you have determined your needs and budget, plan the layout of your kitchen. This includes determining the placement of appliances, countertops, and cabinets. Consider factors such as traffic flow and ease of use when designing the layout.
  4. Choose your materials: Select materials that are durable and appropriate for your lifestyle. For example, if you have children or entertain frequently, you may want to choose countertops and flooring that are easy to clean and maintain.
  5. Consider lighting and ventilation: Lighting and ventilation are essential elements of a well-designed kitchen. Natural light can make your kitchen feel more open and airy, while proper ventilation can help keep your home free of cooking odours and excess moisture. Plan your lighting and ventilation carefully to ensure a functional and comfortable kitchen environment

Conclusion: Kitchen Extensions

Kitchen extensions can expand your home and add value, both in use and for resale. If you’re looking for a way to make your house more beautiful without moving, this could be the perfect solution for you!

But before you get started, remember to get the right contractors who know what they are doing – careful planning and research are key, so that you can build the kitchen extension of your dreams. 

Additionally, keep in mind the budget of your project as hiring cheap labour will often mean lower quality results, while higher quality labour may come at a higher cost. So always stay within your limits and have patience regarding the finishing touches.

Now that we have covered some tips on how to go about getting your kitchen extension done right, why not take a look around London and see what other ideas you can find? Got any other ideas for kitchen extensions in London? Let us know in the comments below – we’d love to hear what other creative solutions people use these days!

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Kitchen Extensions; A Guide To Your Kitchen Extension