London and The West Midlands’Leading Home Extension Specialist
London and The West Midlands’Leading Home Extension Specialist
At BuildUp Loft & Extension, we’ve successfully completed hundreds of home extension projects across London and the West Midlands. Over time, we’ve gathered a list of the most frequently asked questions from homeowners just like you—covering everything from planning permission to timelines and pricing.
Still can’t find the answer you’re looking for? Our friendly team is here to help. Just give us a call on +44 7771 377253, and one of our advisors will be happy to assist you.
On average, kitchen extensions in London take around 10–12 weeks to complete. However, this timeline can vary depending on factors such as the size, design complexity, and specifications of your project.
For example, some of our completed builds in areas like Highbury and Holloway have included spacious kitchen-diner layouts, en-suite bathrooms, and even underfloor heating—yet were still completed in just a few months.
When you book a free consultation with BuildUp Loft & Extension, we’ll assess your property and provide a tailored time estimate based on the scope of work involved. Throughout the process, your dedicated project manager will oversee every step and keep you fully informed, especially if any adjustments to the schedule arise.
Our current lead-in times are typically 2 to 4 weeks, provided that all required documentation is in place—such as architectural plans, structural calculations, and party wall notices (if applicable).
BuildUp Loft & Extension operates throughout London and the West Midlands, including areas like North London, South London, Richmond, and Birmingham. Depending on your location and project readiness, we may be able to begin construction within just two weeks of receiving your final specifications.
Please note that all planning permissions and approvals must be granted before work can start. If you’re unsure about what’s required in the pre-build stage, our team is here to help. We’re happy to guide you through the process and answer any questions you may have.
📞 For the most accurate estimate on lead times, call us today on +44 7771 377253 or email us at thomasbuilderteam@gmail.com.
📝 Or request a quote online to get started.
At BuildUp Loft & Extension, every project starts with a free site survey—where one of our experienced surveyors visits your home to assess your space, discuss ideas, and understand your requirements in detail.
Following the visit, you’ll receive a no-obligation quote. This quote is flexible—we’re happy to revise it as many times as needed until you’re fully confident in moving forward.
Once the contract is signed (with a fixed timeline in place), we begin the design and planning phase. On average, it takes 4 to 5 weeks from contract signing to reach final agreement on your plans. However, if you’re on a tighter schedule, we can fast-track this process wherever possible.
At BuildUp, we tailor our approach to meet each client’s unique needs—and we take pride in being among the most trusted extension builders in London and the West Midlands.
After a BuildUp surveyor visits your property and completes the site survey, you can expect to receive a detailed, comprehensive quotation within 7 working days—often even sooner.
If your quote hasn’t arrived within that time frame, please check your junk or spam folder, as emails occasionally get filtered incorrectly. If it’s still missing, don’t hesitate to call our team on +44 7771 377253 or email us at thomasbuilderteam@gmail.com and we’ll make sure you get it right away.
At BuildUp Loft & Extension, we truly value your input. If you’d like to discuss your quotation, tweak the design, or add features—just speak to one of our friendly advisors. Whether you’re in Islington, Highgate, Isleworth, Notting Hill, or Birmingham, we’re committed to delivering a tailored experience.
We also offer a competitive price match guarantee. If you find a like-for-like quote from another reputable builder that’s lower, get in touch with our sales team—we’ll do our best to match it.
At BuildUp Loft & Extension, our prices are reviewed periodically to reflect industry changes such as rising material and labour costs. Your quotation is valid for three months, giving you the flexibility to plan with confidence.
During this time, if your needs or design preferences change, your quote can be adjusted accordingly. We understand that home extension plans can evolve, and we’re here to support you every step of the way. Whether you’re expanding your kitchen, adding a loft, or rethinking layouts, we’ll work closely with you to ensure your updated vision is reflected in the final design and cost.
BuildUp is committed to making your extension experience as smooth, transparent, and flexible as possible.
You might be surprised to learn that not all home extensions require planning permission. Many projects fall under what’s known as Permitted Development Rights. To learn more, head over to our FAQs section where we break this down in simple terms.
For those projects that do require planning permission, it typically takes around 8 weeks for approval, depending on your local authority. While you’re waiting, why not explore our project gallery for inspiration? From stylish rear kitchen extensions to modern bathroom refurbishments, you’ll find a variety of real projects we’ve completed across London and the West Midlands.
Your dream extension starts with a vision—let BuildUp help you shape it.
If your property is not located in a conservation area, you may benefit from Permitted Development (PD) rights. This allows you to carry out certain types of home extensions without needing full planning permission.
To check whether your project qualifies under PD, you can visit the official UK Planning Portal for up-to-date guidance and criteria.
Still unsure? Don’t worry—our experienced team at BuildUp Loft & Extension is here to help. Give us a call and we’ll be happy to assess your situation and advise you on the next steps.
It’s important to confirm planning permission requirements before beginning any work to avoid costly delays.
When applying for planning permission, you’re asking the local council to assess whether your proposed extension is acceptable under their local development plan. This process is subject to approval and can be rejected by the council or objected to by neighbours.
In contrast, with Permitted Development (PD), you’re confirming that your proposed extension meets pre-approved criteria. If your plans comply, the council will issue a Lawful Development Certificate as formal confirmation.
Important to Note:
You’re not legally required to obtain this certificate before starting work—many of our clients choose to begin building immediately after confirming PD eligibility to save time.
At BuildUp Loft & Extension, we’re here to help you navigate either route confidently and efficiently.
If your property shares a wall with a neighbouring home, you may need a Party Wall Agreement before starting any extension work. This is a legal requirement designed to protect both you and your neighbour when building work could affect a shared (party) wall.
Under the Party Wall etc. Act 1996, you must serve a Party Wall Notice to affected neighbours at least two months prior to your intended start date. The agreement outlines responsibilities and resolution steps in case of any damage or disputes.
💡 Good to Know:
While this process is usually managed directly by homeowners, BuildUp Loft & Extension can offer advice and, if needed, connect you with a certified Party Wall Surveyor to guide you through it.
From rear kitchen extensions to side return extensions and double-storey builds, there are many ways to expand and completely transform your home. At BuildUp Loft & Extension, we specialise in creating beautiful, functional extensions across London and the West Midlands—whether you’re looking to extend outwards, upwards, or both.
✅ Dreaming of an ensuite bathroom?
✅ Need a spacious kitchen for family dining or entertaining?
✅ Want to increase your home’s value and space without moving?
With years of experience and countless successful projects, no job is too big or too small for our team. We deliver professional results every time—tailored to your needs and lifestyle.
There’s no denying that building work can bring some disruption and occasional stress—after all, we’re transforming a part of your home! But with the right planning and a few smart strategies, the process can be made much smoother.
Here are a few practical tips to help ease the experience:
Consider relocating during the build:
If your budget allows, moving out temporarily can help you avoid the day-to-day disruptions of construction. We understand this isn’t always possible, so there are still plenty of other options to help you manage the process while staying at home.
Set up a temporary kitchen:
If your extension affects your kitchen, creating a small temporary cooking area will keep daily life running more smoothly.
Use stud partitions to contain dust:
Temporary walls can help reduce dust spreading through your home, protecting furniture and living areas.
Protect your valuables and fragile items:
Make sure to pack away anything delicate or valuable before work begins—tools, materials, and workers will be moving through the space frequently.
At BuildUp, we do everything we can to keep the process as hassle-free as possible. And remember: a little short-term disruption is a small price to pay for the beautifully finished extension you’ll soon enjoy.
Choosing to build a home or kitchen extension doesn’t just add valuable space—it’s also the perfect opportunity to completely transform the look and feel of your home.
Many of our clients take this time to update other areas of their property, especially if their décor feels dated or no longer fits their style. At BuildUp, we frequently carry out refurbishment work alongside extensions, helping to modernise and enhance rooms such as:
Bedrooms
Living rooms
Bathrooms
Downstairs toilets
Utility rooms
We cover most areas across London and the West Midlands, and we offer comprehensive site surveys to assess your requirements and provide tailored advice.
Interested in a site survey?
Please get in touch to enquire about pricing and availability.
Let us help you make the most of your extension project by giving your entire home the refresh it deserves.
The cost of a home extension in London or Birmingham can vary significantly depending on your specific needs and the scope of work involved. For instance:
You might require a small bedroom with an ensuite,
Or a brand-new kitchen complete with a utility room and extra living space,
Or even a double-storey extension to truly maximise your home’s potential.
Factors that influence the final cost include:
Size and layout of the extension
Type of roof (flat, pitched, or vaulted)
Choice of windows, doors, and finishes
Structural requirements and complexity of the build
Having completed numerous extensions across London and the West Midlands, BuildUp understands that budgeting is a key concern for homeowners. That’s why we’ve created a dedicated [Cost Guide Page] to give you a clearer idea of what to expect when planning your extension.
Explore our Cost Guide
See example pricing to help you plan and budget for your dream extension with confidence.
At BuildUp, we operate a dedicated loft conversion division known as BuildUp Loft, which has successfully transformed thousands of lofts across London and the West Midlands.
Whether you’re looking to create a new master bedroom with an ensuite, a home office, or even a private studio space, a loft conversion is a smart way to maximise unused space and increase the value of your home.
Many of our clients choose to carry out a loft conversion and a home extension simultaneously, reducing costs and avoiding the hassle of coordinating multiple contractors. With both services managed under one expert team, the process is streamlined and efficient — with minimal disruption to your daily life.
Just like our extension service, BuildUp Loft guarantees a professional finish, delivered by specialists who understand the structural, planning, and design considerations unique to loft spaces.
Considering a Loft Conversion?
Get in touch to discuss how we can help you make the most of your property with a seamless, high-quality loft transformation.
Looking to unlock the hidden potential beneath your home? Our sister company, Build Up Basement, specialises in basement conversions throughout London and Oxford, transforming underutilised spaces into beautiful, functional living areas.
Whether you’re planning a home gym, cinema room, additional bedroom, or a full basement apartment, BuildUp Basement provides a complete design-and-build service tailored to your needs.
Want to explore the possibilities below your property?
Visit the BuildUp Basement website for more details or book a visit with one of our specialist basement surveyors for a personalised quotation.
Whether you’re planning a home extension in South West London (Kingston, Hampton), North London (Haringey), or even in the heart of Central London, BuildUp delivers outstanding results with professionalism and precision. Now proudly expanding our services to Birmingham and the West Midlands, we bring the same level of excellence across regions.
From your initial idea to final construction, our expert team supports you every step of the way—before, during, and after the build. All of our work is backed by a comprehensive 10-year warranty, and we offer an independent insurance-backed deposit and warranty protection scheme for added peace of mind.
Having transformed thousands of homes across London, your project is in safe and experienced hands.
📍 Get a Free, No-Obligation Site Survey
Want to see one of our completed projects near you? Call us today to arrange a visit or consultation.
At BuildUp, your peace of mind is our priority. We have comprehensive insurance policies in place to cover all aspects of our work.
Should you wish to review any documentation, please feel free to request it directly through your designated surveyor—we’re always happy to provide it.
At BuildUp, we’ve successfully delivered home and kitchen extensions across South London, North London, and the surrounding boroughs—chances are, there’s one of our completed projects not far from you. We are also proud to now be working throughout Birmingham and the West Midlands.
If you’d like to see the quality of our craftsmanship, we’re happy to provide references or arrange for you to view a local project. You can also explore our Case Studies page to see detailed examples and images of our previous work.
We cover South London, North London, West London, Central London and everything in between, so if you would like a home or kitchen extension, then please be sure to get in touch or visit our case study section to find out what work we have completed in your area. We are also pleased to be operating across Birmingham and the West Midlands. Call our friendly team on +44 7771 377253 and they will be able to advise whether we cover your postcode.
For a free site survey please fill out the form below and we’ll get back to you, or call our freephone number +44 7771 377253
Extensions Kitchen Extensions – House Extensions – Flat Roof Extensions – Side Return Extensions – Wrap Around Extensions – Rear Extensions
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