Are you looking for a house or kitchen extension, renovation or refurbishment in Northwood? House Extension London are here to assist you. We arrange a free no-obligation site visit at your property to assess your house extension aspirations, thoughts, vision, and budgetary concerns. We will help you plan, design and build you extension in Northwood.



Bespoke House Design in Northwood

We understand that no two houses are the same. Therefore, we only do 100% custom design, planning, and consult with you in each step of the process. Our architects will work closely with you to draw ideas into a final set of plans for the extension build phase. Planning permission rules vary from council to council. It is important to choose the right architects who have experience in your council to support your planning permission application.


Our build teams begin construction under the supervision of your personal project manager. We will provide you a detailed plan of the project to ensure that the right trades, tools, and materials will be on-site at the right times for a smooth build. Our construction is only completed when you are happy, the job site is then cleared so that you can start decorating your newly extended living space.


Our team has a lot of experience when it comes to kitchen extensions. A Kitchen extension in Northwood is one of the most popular types of home renovation undertaken by London residents. A newly added kitchen can increase the value of your property by 6% and many buyers in Northwood see this first when buying the property. Our team can offer our expertise and guidance so that your extension process runs efficiently.



You can choose from a wide range of house extension solutions, such as: Single storey extension, Rear Extensions, Double storey extension, Side extensions, Bungalow extensions, Garage & house extensions. We cover the whole of London and the home counties supplying a comprehensive solution to our clients varying requirements.



Most house improvements involve an addition of an extra space to accommodate either a new bigger kitchen, adding a shower or toilet under the stairs, increasing the internal space for big family functions. All modern house extensions nowadays have bi-fold doors, skylights, Velux windows etc. Many London families are opting for the open plan kitchen and dinner as they tend to offer better use of the space and feels spacious too. Contact our team today to discuss your house extension options and free no obligation quote.

What can we do for your Property in Northwood?

If you would like to discuss the ways in which a House Extension could enhance your Northwood property, call us on 0208 1050 675 or email info@houseextensionlondon.com to ask us any questions. For a free site survey and design consultation please fill out the form on the right and our team will get back to you as quickly as possible.

House Extension Northwood

Located in the north-west of Greater London, within the London Borough of Hillingdon, Northwood is the old country of Middlesex.

In the early ages, NorthWood recorded ten houses and several farms, with only 40-60 people, and in the year of 2011, the census recorded 10,949 and 11,578 on the Northwood hills. NorthWood’s transport connections, good schools and vast amounts of green space make it a great place to grow kids and for families.

Most of the Northwood families like a big space for themselves and to spend with family.

Reasons to consider home renovation/Extension in Northwood.

Owning a property in Northwood is the most valuable asset you have.

Finding a land, taking all necessary improvements and building a house needs a lot of effort and time, also it can be way too expensive instead then renovating the present house. It can be a bit daunting, but if planned correctly will end successfully, and can be exciting also. Indeed it is one of the most significant investments you make both financially and emotionally. Plus, it will turn into a perfect investment for your Northwood house.

You may also be aware that buying a new home, complete with all the necessary permissions is so intimidating

Without the hassle of moving, and with a much smaller budget, home renovation enables you to have the feeling to stay in a new room. So why not opt for house renovation for your present house? House extension London can help you to make your living space more valuable, with your and our exclusive ideas to turn your dream into reality. Whether you have an extra living room, a guest room, a restroom, or a home office, our House extension Northwood conversion services allow the entire remodelling and financial rewards if you ever sell your property.

House extension London brings luxury to you. Our House extension Northwood services come with unique and exclusive ideas to make your living space more valuable. House extensions not only provide you with an extra place, whether you are opting an additional living room, bathroom, kitchen or office, but also offer financial rewards when you sell your property. And we are proud to offer our lavishness at such an affordable cost.

Factors Affecting House Extension work?

There are many factors that can affect the type and work process of extension. A few main facts are:

Local Area - Limitation and planning restrictions

Budget - Depending on the overall extension work, options may change

Position - Neighbouring properties and access can affect extension preferences

Timeline - Deadline can also affect the extension type

What keeps us on top?

House extension London provides all construction-related services, with many years of experience in creating property extension projects around Northwood and London. We are determined to finish all our work to a premium standard quality every time and have received trust and credibility with our valuable customers. We believe in satisfying our clients with our work and ensuring that their wishes and expectations are fulfilled and exceeded.

We are a premium one store company for all kinds of extension requirements and handle all the stages of extension services from the design and planning processes to the final build and organising approval from local Northwood authority building investigators.

Our House extension Northwood services include -

Full House Renovation

Design to Building Service

Loft conversion (Single Storey, Double-Storey, kitchen extension, etc.)

Architect Service

Our House Extension Services includes -

No one wants to have a monotonous lifestyle; everyone always stays ready to give a chance to a comfortable place. Therefore, you may have a dilemma that to move to another place and give up on your traditional house and the other side you may not want that from your heart as it has given you beautiful memories. If you are in such condition, don't worry, you are in the right place, contact us, and we would be happy to design your house that still carries the same remembrances. Also, with the exaggerated house, you can develop much more memories with your family and friends.

Now venture some of our existing extension projects -

Kitchen extension - We provide The company with the latest designs and styles and all the trending templates to suit your lifestyle.

Loft Conversion - It is our key feature. From the dormer conversions to Velux convertible, all you can get at one place.

House renovation - Here, our central part comes in. We offer a full-scale extension with all necessary in built facilities. Our this service would be the best suited for you if you are seeking a House extension Northwood.

Bathroom Conversion - Mostly, people tend to ignore this vital part, as all your exciting ideas cultivate there. So having a classy bathroom at your modern house is essential. Get your full Bathroom remodelled with us.

Get genuinely personal service with House extension London.

Sometimes people hold onto their plans, due to their doubts. Well!!! if you have any which is holding you back, let's clear it here. So, the question you may have is why you should go with us? So, here is your answer. Above all, House extension London believes and values their customer' satisfaction. We take care of all of your most tin wishes and convert you home into precious.

Our Services and work process

Design -

Whether is your requirement, for your growing family or you need an extra bedroom, or you want an open space, an extension can help you to find a solution to maximize your space. We have trained and skilled designers who can help you with a unique space to fulfil all your briefs.

Approval -

We have expertized in obtaining planning consent for house extensions. On your behalf, we'll complete all the necessary documentation work to demonstrate your proposal according to the permitted development guidance.

Technical -

Here we carry out our detailed technical drawings. We also keep in a loop for our entire process to update your building construction. Having a good, detailed set of drawings is crucial to complete the project accordingly.

Let's start work.

Now your dream project is all set to go under construction. Throughout the project, we provide you with continued service and support.

Personalised House Extension

Personalised services from start to finish - We have a set of experienced crew. Our team is able to decipher your imagination and visions easily and turn that into an appropriate algorithm for execution. We cater to all kinds of modern designs and styles, so you choose the best one accordingly. Our crew use the latest technologies and tools to execute those innovative ideas. Additionally, House extension London adheres to the timeline, we pay our complete attention to complete the full project on or before the agreement specified date.

Prompt customer services - With the years of service experience in House extension Northwood, we exhibit transparency and hassle-free payments with top quality work assurance. Before starting project work, we share detailed information with our clients and not extract single money than what has been quoted in our house extension Northwood statement. For your understanding, we offer you a free site visit and ensure that quality is not being compromised anywhere. We monitor our tradesmen's work from our checking room, and our testing team reviews the work once it gets completed. We guide you throughout the project and involve as much as little you want.

Quality work  -

We provide architectural environments at a more realistic cost compared to others. Our quality work vows for us, and it's our customer's satisfaction that has made us a leading builder across London.

Flexible designing approach -

We believe in adopting the latest technologies and designs. We do not stick to ourselves with a fixed method. According to your brief, we serve you with the best and latest type of extensions design.

Our project start to finish concept -

• Architectural Drawings

• Planning applications and permission ( if required)

• Building Control

• Project cost estimation

• Detailed architectural designs

So, now we guess, have cleared all of your doubts. Now it's time to redefine your existing home to feel the magnificence with House extension London.

Visit our website to know more about our work. We commit ourselves to our work and then earn your trust!  Get in touch with us.


Frequently Asked Questions about House Extensions in Northwood

A house or kitchen extension is an investment in your home, so we know you will have a few questions before you get started.

  • How long will my House Extension take in Northwood?

    A standard house extension takes between 7 to 9 weeks for the initial build. And a further 5-7 weeks for installation of kitchen and other facilities. Overall, there size of the building and the scope of the extension are the major factors on how long the house extension will take.

  • How quickly can you start an Extension at my Northwood property?

    Our lead times are currently at 3-4 weeks, assuming you have the architectural plans, structural calculations, and party wall notices ready. House Extension London have teams all over London and the home counties. Wherever you are based, we can get your house or kitchen extension started in as little as two weeks. If you have any questions, contact our highly experienced team who will guide you through the whole process in much more detail.

  • How much value will be added to my house in Northwood ?

    House extension is one of the fastest and most effective way to add value to your house. An expertly constructed and finished house or kitchen extension can add up to 25% value to your house. It’s a fantastic amount of value added to your house instead of spending this on stamp duty when moving home. At House Extension London, we believe you should prefer moving up instead of moving out.

  • How long will plans take to draw if we decided to go with House Extension London?

    Our process of House extension in Northwood starts with a site survey where our surveyor will visit your property and guide you on what is possible. All this will be free of charge as it’s a no-obligation quotation. After the site visit, you will be provided with a rough quote until we have the structural calculations ready. Once you are happy with the quote, we will draw a contract to be signed and give you a start date. House Extension London tries to cater for all our customers needs and we are proud to be one of London’s best extension builders.

  • How long are your quotations valid for?

    We review our prices every quarter to take into consideration price increases of materials and inflation too. Our quotations are therefore value for up to four months. In this time period, you can alter your quote to suit your needs if needed. We will work alongside you to alter any design you want until you are fully satisfied with it.

  • What size of an extension can I build under Permitted Development?

    Permitted development guidelines for the house extension size can vary based on the type of property you are extending. As a general estimate is that 3m is allowed for a terraced and semi-detached properties. Detached properties can get up to 4m without planning permission.

  • When do you need planning permission for an extension?

    You will need planning permission for an extension when the design and size of the extension exceeds the provisions of permitted development. If you live in a flat or conservation area you will need to apply for planning permission regardless of the design and size of the extension.

  • How long does planning permission take for a house extension?

    Once the planning application has been submitted to the local authority, it can take up to 8 weeks. It takes between 4 to 8 weeks for an architect to prepare and submit the plans. Ideally, we suggest to give at least 3 months in advance for the construction company to start the process.

  • Will my Boiler work effectively with my new House Extension?

    By adding a house extension, the demand for current hot water and heating systems will increase. You might need to change to a new boiler that has a bigger output. Many homes tend to install a hot water cylinder when extending their property to the rear.

  • What do I need to know about the Party Wall Act?

    Your neighbours cannot stop you from constructing up to, or even on, the boundary between your properties, even if it requires access onto their land. This issue is not covered by planning or building control. If you are undertaking a house extension that involves digging or building foundations within 3m of the boundary, party wall or party wall structure, or digging foundations within 6m of a boundary, this sort of work will require you to comply with the party wall act. You will need a surveyor to act on your behalf. Such an act does not apply in Scotland.

  • What if my House Extension is near or on a Sewer?

    If your house extension will be built over or near a seer, you have to contact your local water board before work commences. In many cases, your architect will have to draw plans on how you intend to change the pipework, and these will be submitted to the water board for approval. It can take up to 3-4 weeks to get this approved and we strongly suggest not to start any work before obtaining a letter of approval.

  • Can I stay on site during the house Extension?

    Yes, it is normal to live on the site throughout the house extension, however there will be dust and mess and it can slow down the progress as the builders will try to work around your life. If you are not prepared to live with the disruption, then you should surely look for temporary accommodation especially during the dusty stage.

  • Do I need to inform building control of my house extension?

    Yes, before you commence your construction project, you will need to submit either a building notice or a full planning application to building control. A building notice will allow you to start the work quickly but there will be lack of protection that a building control has signed off on the construction work. In this case, you will be liable to correct any work that faults to meet building regulations standard upon inspection.

  • Building regulations in Northwood

    Regardless of whether planning permission is required or not, any sort, any construction project must comply with the building regulations. You need to make sure that whoever undertakes the work can self-certify the work, for example, FENSA accredited window fitters, Gas Safe engineers, NIXEIC registered electricians and so on. If these requirements are not met, you could be served notice to take the extension down and will have trouble selling your home without relevant building regulations certificates.

  • How to brief an architect before starting our project?

    Before starting your house and kitchen extension, its vital you give as much information as possible on what you want from the house extension, your timings, how and when you intend to pay them and what penalties will be in place if deadlines are missed. The architect will send you a detailed plan and a contract to sign.

  • How to get Structural engineer calculations?

    If your house extension requires any structural changes to your home, you may need a structural engineer. A structural engineer can provide the technical drawings and calculations which can be used to get building regulation approval. This will also be used by the construction company during the house extension work.


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