House Extensions · Borehamwood

House Extensions in Borehamwood

We build beautifully insulated home extensions fast, with expert project management and craftsmanship you’ll feel every day.

Call Now for a Free Quote01727 224616

White rendered single-storey rear house extension with grey patio and bi-fold doors in Hertfordshire

Brick single-storey rear extension with Crittall-style glazing and a cottage garden

Red-brick single-storey rear extension with anthracite sliding doors and patio in Harpenden

0% finance available*

*subject to terms

Fast 3–5 week extensions
Expert project management
Family-owned, trusted service
Highly insulated builds
5-star customer satisfaction

Trusted house extension builders serving Borehamwood

The Home Extension Company delivers high-quality house extensions serving Borehamwood, combining streamlined build methods with premium craftsmanship to create beautiful, practical new living space with minimal disruption. As a family-owned team with over 20 years of experience, every project is professionally project-managed from the first consultation to final handover—coordinating all trades, keeping timelines clear, and providing consistent updates throughout. Known for fast turnarounds on many extensions in as little as 3–5 weeks, The Home Extension Company focuses on highly insulated construction for year-round comfort and energy efficiency, while ensuring a seamless finish that complements your existing home. With a reliable, customer-focused approach and 5-star rated service, they aim to make the entire extension process straightforward, tidy, and stress-free.

Open-plan house extension in Borehamwood with grey porcelain floor tiles, a roof skylight and anthracite bi-fold doors

10-Year Structural Guarantee

25-Year Roof Guarantee

5.0 rating

Loved by homeowners across Hertfordshire

Read genuine five-star reviews from our recent house extension customers.

5 Aug 2026

Second project with the team and once again faultless. Professional, tidy and finished on schedule. Highly recommended.

Oliver Hayes

3 Apr 2026

We cannot praise the company highly enough. Our extension was completed quickly, yet there was no sense that the work had been rushed. The quality and attention to detail are excellent, the finished space looks beautiful, and it stays exceptionally warm.

Ananya Kapoor

15 Mar 2026

The team organised everything, kept the project progressing and finished the entire extension in under six weeks. The completed room looks superb and has transformed our home. We have also been impressed by how well insulated it is.

Rohan Mehta

24 Feb 2026

Choosing a company to build an extension is a major decision, but we are extremely pleased that we chose this team. The build was completed quickly, and the quality of the finished extension is excellent. The service was friendly and professional throughout.

Priya Sharma

5 Feb 2026

We recently had our house extension completed by this company and could not be more pleased with the result. The entire extension was completed in under four weeks, which was far quicker than we had expected. Despite the speed, the finished quality is excellent.

Arjun Patel

17 Jan 2026

We received a professional service throughout the project. The team managed the complete build, worked efficiently and delivered our extension quickly. The result is an attractive and well-insulated addition that feels fully integrated with our home.

Linh Nguyen

30 Dec 2025

Absolutely over the moon with our extension! It looks great, stays really warm and was finished much quicker than we thought possible. The team sorted everything out and made the whole experience easy for us.

Kenji Tanaka

11 Dec 2025

The quality of the craftsmanship is clear throughout our new extension. Every part looks carefully finished, and the room is noticeably warm and comfortable. Delivering this standard of work so quickly was very impressive.

Hannah Kim

23 Nov 2025

The extension has transformed our house and given us a room we genuinely love spending time in. It is bright, comfortable and warm, and the finish is excellent. Seeing it completed so quickly was remarkable.

Wei Chen

4 Nov 2025

The entire build was well organised and completed promptly. Communication and service were good throughout, and the finished extension feels solid, warm and built to a high standard. We're very pleased with our decision.

Sophie Dubois

16 Oct 2025

Several people have already commented on how good our extension looks. We're extremely pleased with the result and wouldn't hesitate to recommend the company to friends, family or neighbours.

Camille Laurent

28 Sep 2025

An outstanding job from a genuinely professional team. We love the finished extension.

Julien Moreau

9 Sep 2025

It was reassuring to work with a company that took responsibility for the whole process. They were professional, dependable and clearly took pride in their work. Our completed extension is warm, attractive and extremely well finished.

Piotr Zieliński

21 Aug 2025

We were surprised by how quickly and smoothly everything came together. The team handled the complete project and kept the disruption to a minimum. In no time at all, the extension was finished and ready for us to enjoy.

Katarzyna Nowak

2 Aug 2025

A huge thank you to the whole team for doing such a wonderful job on our extension. It was completed impressively quickly, and we are delighted with the quality, warmth and appearance of the finished room.

Jakub Kowalski

14 Jul 2025

Fast, professional and reliable. The team delivered everything they promised, and our new extension looks absolutely fantastic.

Elena Castillo

26 Jun 2025

Our new extension has completely changed the way we use our home. It has given us a beautiful, warm additional living space, and the team managed to complete the entire build quickly.

Carlos Romero

7 Jun 2025

The project management was excellent. Everything was organised properly, the different stages ran smoothly and we always felt that the job was under control. The extension was completed quickly and looks superb.

Lucía Navarro

20 May 2025

From the initial conversations through to completion, the service was excellent. The team took responsibility for everything and made sure the project progressed smoothly. Before long, we had a beautiful, warm and professionally finished extension.

Javier Morales

1 May 2025

If you're considering having an extension built, I'd definitely recommend this team. They made the process simple, did what they promised and finished ours quickly.

Benjamin Cooper

12 Apr 2025

The finished extension has exceeded our expectations. It looks fantastic, feels warm even in colder weather and blends beautifully with the rest of our home.

Grace Palmer

24 Mar 2025

We are delighted with the standard of our completed house extension. The project was professionally managed, efficiently delivered and completed within four weeks. The finished space is attractive, comfortable and exceptionally well insulated.

Samuel Webb

5 Mar 2025

We're so happy we chose this company. They handled the whole job, finished ahead of our expectations and gave us a beautiful new extension that we can enjoy throughout the year.

Eleanor Clarke

15 Feb 2025

A rare combination of speed and quality. The team completed our extension quickly without sacrificing the finish. The result is a warm, attractive and practical addition to our home.

Jack Richardson

28 Jan 2025

I don't normally write reviews, but the team deserves recognition for the work they have done. Our extension looks brilliant, stays lovely and warm, and was finished ahead of schedule.

Amelia Brooks

9 Jan 2025

Having an extension built can feel daunting, but the team made everything surprisingly easy. They managed the entire project, kept everything moving and completed it ahead of schedule.

William Turner

23 Dec 2024

Five-star service throughout. The extension was completed incredibly quickly, the workmanship was excellent and the finished room looks amazing. Thank you to everyone involved.

Rebecca Dawson

6 Dec 2024

The team built our house extension in under six weeks and we are very happy with it. It is warm, well finished and has given us exactly the additional space we needed.

George Foster

18 Nov 2024

I would happily recommend this company to anyone considering a house extension. They provided an excellent service, managed everything and delivered a great result.

Lucy Harrison

30 Oct 2024

We have been extremely impressed by how warm and comfortable our new extension is. It feels like a natural part of the house and looks fantastic too.

Thomas Bradley

11 Oct 2024

What an amazing transformation! The extension looks even better than we imagined, and the whole project was completed remarkably quickly.

Hannah Fletcher

23 Sep 2024

A professional, efficient and well-managed service from start to finish. Our extension was completed quickly, looks excellent and remains wonderfully warm.

Matthew Parker

2 Sep 2024

Really pleased with the extension. The team did a great job, finished it promptly and took care of everything along the way.

Charlotte Collins

8 Aug 2024

The company handled everything for us, making the entire process straightforward and stress-free. We couldn't be happier with the finished extension.

Oliver Hayes

19 Jul 2024

Our house extension was completed in under four weeks, which was genuinely impressive. The quality certainly wasn't compromised either, and it looks brilliant.

Emily Carter

27 Jun 2024

We absolutely love our new extension. It looks beautiful, feels incredibly warm and was completed much faster than we expected.

James Whitmore

3 Jun 2024

Excellent service from beginning to end. Our new extension looks fantastic.

Sophie Bennett

14 May 2024

Brilliant extension, completed quickly and beautifully finished.

Daniel Harper

Start your Borehamwood extension today

Let’s plan your Borehamwood extension—get in touch today and we’ll book your consultation, walk you through the timeline, and deliver a seamless build with minimal disruption.

Get a free quote 01727 224616

Recent work

House extensions we've built in Borehamwood

Wrap-around extension with corner bi-fold doors in Hertford — Wrap-around extension with corner bi-fold doors
Hertford

Compact single-storey extension with French doors in Hitchin — Compact single-storey extension with French doors
Hitchin

White render porch with black corner windows in Hertfordshire — White render porch with black corner windows
Hertfordshire

4m rendered extension with Crittall-style doors in Hertfordshire — 4m rendered extension with Crittall-style doors
Hertfordshire

Rendered single-storey extension with full-width sliding doors (in progress) in In progress — Rendered single-storey extension with full-width sliding doors (in progress)
In progress

4m rear extension in London stock brick in Hertfordshire — 4m rear extension in London stock brick
Hertfordshire

Red brick porch with a grey composite door in Hertfordshire — Red brick porch with a grey composite door
Hertfordshire

Brick single-storey rear extension in Borehamwood — Brick single-storey rear extension
Borehamwood

Small rendered ground-floor extension in Borehamwood — Small rendered ground-floor extension
Borehamwood

Kitchen extension with a black marble island and bar seating in Hertfordshire — Kitchen extension with a black marble island and bar seating
Hertfordshire

White render porch with a slate roof in Hertfordshire — White render porch with a slate roof
Hertfordshire

Bright extension with oak flooring and picture windows in Berkhamsted — Bright extension with oak flooring and picture windows
Berkhamsted

Brick rear extension with bi-fold doors in Hertfordshire — Brick rear extension with bi-fold doors
Hertfordshire

Red brick porch with white uPVC door and windows in Hertfordshire — Red brick porch with white uPVC door and windows
Hertfordshire

4m single-storey house extension in Hertford — 4m single-storey house extension
Hertford

Modern extension with skylight and grey tiled floor in Rickmansworth — Modern extension with skylight and grey tiled floor
Rickmansworth

Red brick porch with a pitched tiled roof in Hertfordshire — Red brick porch with a pitched tiled roof
Hertfordshire

Apex tiled-roof extension in Bushey — Apex tiled-roof extension
Bushey

Open-plan extension with oak flooring and bi-fold doors in Welwyn Garden City — Open-plan extension with oak flooring and bi-fold doors
Welwyn Garden City

Symmetrical white render porch with a black door in Hertfordshire — Symmetrical white render porch with a black door
Hertfordshire

Aerial view of a brick rear extension in Hertfordshire — Aerial view of a brick rear extension
Hertfordshire

Brick extension with large sliding doors in Hertfordshire — Brick extension with large sliding doors
Hertfordshire

Open-plan kitchen extension with a white marble island in Hertfordshire — Open-plan kitchen extension with a white marble island
Hertfordshire

White render porch with a sage green door in Hertfordshire — White render porch with a sage green door
Hertfordshire

5m ground-floor extension with sandstone patio in Hertfordshire — 5m ground-floor extension with sandstone patio
Hertfordshire

7m wide rendered rear extension in Hertfordshire — 7m wide rendered rear extension
Hertfordshire

White uPVC porch on a red brick home in Hertfordshire — White uPVC porch on a red brick home
Hertfordshire

Grey rendered extension with bi-fold doors in Hertfordshire — Grey rendered extension with bi-fold doors
Hertfordshire

Rendered extension with sliding doors and skylight in Hertfordshire — Rendered extension with sliding doors and skylight
Hertfordshire

Red brick porch with an anthracite glazed door in Hertfordshire — Red brick porch with an anthracite glazed door
Hertfordshire

Single-storey extension with a flat standing-seam roof and skylights (in progress) in In progress — Single-storey extension with a flat standing-seam roof and skylights (in progress)
In progress

Rendered wrap-around single-storey extension in Hertfordshire — Rendered wrap-around single-storey extension
Hertfordshire

Brick ground-floor extension with bi-fold doors in Hertfordshire — Brick ground-floor extension with bi-fold doors
Hertfordshire

Modern white render porch with a black glazed door in Hertfordshire — Modern white render porch with a black glazed door
Hertfordshire

Single-storey rear extension with bi-fold doors in St Albans — Single-storey rear extension with bi-fold doors
St Albans

Single-storey extension with a zinc standing-seam roof and twin skylights (in progress) in In progress — Single-storey extension with a zinc standing-seam roof and twin skylights (in progress)
In progress

Open-plan extension with skylight and grey porcelain floor in Radlett — Open-plan extension with skylight and grey porcelain floor
Radlett

Kitchen extension with a Calacatta marble waterfall island in Hertfordshire — Kitchen extension with a Calacatta marble waterfall island
Hertfordshire

White render porch with a black composite door in Hertfordshire — White render porch with a black composite door
Hertfordshire

Rear extension with bi-fold and sliding doors in Hertfordshire — Rear extension with bi-fold and sliding doors
Hertfordshire

Single-storey extension with full-width sliding doors in Watford — Single-storey extension with full-width sliding doors
Watford

Red brick porch with anthracite French doors in Hertfordshire — Red brick porch with anthracite French doors
Hertfordshire

Rendered flat-roof extension with sliding doors in Hertfordshire — Rendered flat-roof extension with sliding doors
Hertfordshire

Brick single-storey extension in Harpenden — Brick single-storey extension
Harpenden

Modern porch with an anthracite glazed door in Hertfordshire — Modern porch with an anthracite glazed door
Hertfordshire

Our house extension services in Borehamwood

At The Home Extension Company, we help you expand your home with house extensions that are thoughtfully designed, expertly built, and tailored to how you actually live. We’ll guide you from the first conversation through planning support, clear timelines, and careful construction, so you’re not left guessing what’s happening next.

Because we’re reliable and craftsmanship-driven, we don’t cut corners—we focus on strong structure, neat finishes, and details that make the new space feel like it’s always belonged. We’re customer-focused throughout, keeping communication straightforward and your home respected while we work, and we’re proud to serve Borehamwood with extensions that add space, comfort, and long-term value.

Why choose us for your Borehamwood house extension

Our Borehamwood extensions are crafted with both style and sustainability in mind. Every build is made to last and delivered with meticulous attention to detail, on time and within budget – no shortcuts, no compromise.

Here's what makes us stand out:

Custom built designs to suit your lifestyle
Premium, low maintenance extensions built to the highest quality
Exceptional insulation for energy efficiency
Professional service from start to finish
Eco-conscious foundation with minimal environmental impact

Planning an extension in Borehamwood? Tell us about your project.

Customer-Focused House Extensions in Borehamwood — Built Faster

We serve Borehamwood with a simple promise: we’ll shape the build around you, not the other way around. That means listening closely, planning tightly, and keeping you informed so you’re never left guessing what’s happening in your home. With us, you’ll get a high-quality house extension that’s designed to fit your daily routine as much as it fits your property.

There’s a common theory that “fast builds” must cut corners—either on workmanship, structural performance, or finish. We don’t buy that, and our results back it up. Speed isn’t about rushing; it’s about specialising. Because we focus exclusively on home extensions, we’ve refined a streamlined method that removes delays, reduces handover gaps, and keeps every stage moving—so many projects can be completed in as little as 3–5 weeks without compromising on quality.

The other theory worth testing is that building work has to turn your life upside down. We’ve found the opposite can be true when the process is engineered to minimise disruption. By coordinating trades, materials, and scheduling with your household in mind, we keep the site controlled and predictable—so you can enjoy your new space sooner and with far less stress than a traditional build.

Rendered single-storey house extension built by our house extension builders in Borehamwood

House extensions that add living space in Borehamwood

When your home starts feeling tight, it’s rarely because the walls have moved—it’s because life has. Kids need room to spread out, work-from-home days demand a quiet corner, and a once-adequate kitchen can suddenly feel like a bottleneck at every mealtime. We help you reclaim breathing space with a house extension that’s designed around how you actually live, so your home feels calmer, brighter, and easier to use from the moment you step into the new area.

We specialise exclusively in high-quality home extensions, and our fast, streamlined approach means many projects can be completed in as little as 3–5 weeks. That speed isn’t about cutting corners—it’s about efficient planning, proven construction methods, and keeping the site organised so your day-to-day routine isn’t swallowed by weeks of mess and noise. We focus on structural performance and solid finishes, creating seamless transitions where the new space feels like it’s always belonged—whether that’s a larger family room, an open kitchen-diner, or a dedicated office that finally shuts out the rest of the house.

If you’re serving a busy household in Borehamwood or nearby, we know disruption is often the biggest worry. That’s why we keep the build tight, tidy, and purposeful—fewer drawn-out phases, fewer lingering trades, and a clearer path from “we need more space” to “we can’t believe we lived without this.” With a well-planned extension, you don’t just add square footage—you gain flow, comfort, and a home that keeps up with you.

Brick rear house extension with anthracite bi-fold doors in Borehamwood

Highly insulated house extensions in Borehamwood

A well-planned house extension lets us create the space we need without the upheaval of moving. Whether we’re adding a bigger kitchen, a home office, or an extra bedroom, we can reshape how your home works day to day—improving flow, comfort, and the way everyone uses the space.

House extensions also protect what we already love about our home while adding long-term value. When we extend, we can design around natural light, storage, and modern lifestyles, making the new space feel like it’s always been there rather than an afterthought. Done properly, it’s an investment in both our lifestyle and the future of the property.

At The Home Extension Company, we make the process feel straightforward through professional project management from start to finish. We’ll keep you informed throughout the build, coordinate every trade, maintain clear timelines, and work efficiently to minimise disruption while your home evolves. We serve Borehamwood with an experienced team that manages every detail, so your extension stays on track and delivers the space you’ve been imagining.

Fast house extension builds in Borehamwood

At The Home Extension Company, we believe getting the extra room you need shouldn’t turn your life upside down. Our affordable house extensions are designed to be completed in as little as 3 to 5 weeks, so you can keep your routine moving while your home grows around you. It’s a faster, smoother way to add space without the long, drawn-out timelines that often come with traditional builds.

We use modern construction methods that help keep labour costs down while still delivering exceptional quality. That means you’re not choosing between speed, price, and a finish you’ll be proud of—you can have all three. Think of your extension like a well-rehearsed relay race: every stage is planned to hand off cleanly to the next, keeping the whole project moving efficiently.

Whether you’re opening up a larger kitchen, creating a bright family room, adding a home office, or simply gaining extra living space, we’ll help you start enjoying it in weeks, not months. We serve Borehamwood with a straightforward, disruption-minimising approach that’s focused on making your home feel bigger, better, and more workable—fast.

Inside our work

Inside our finished extensions in Borehamwood

House extension interior in Borehamwood with light oak flooring and grey-framed bi-fold doors onto the garden

Single-storey house extension in Borehamwood with oak flooring and a full wall of black-framed sliding doors

Modern wrap-around house extension in Borehamwood with grey tiled floor and corner bi-fold doors

Aerial view of a pitched-roof brick house extension in Borehamwood

House extension FAQs for Borehamwood

How long does a house extension usually take to build?+

Most extensions take several weeks to a few months depending on size and complexity, but because we specialise exclusively in home extensions, we can complete many projects in as little as 3–5 weeks. We’ll confirm a realistic programme after we’ve reviewed your home, design, and access, and we’ll keep you updated throughout so you’re never left guessing.

Do we need planning permission for a house extension?+

Not always. Some extensions can be done under permitted development, while others will need planning permission (especially if you’re changing the front elevation, building near boundaries, or exceeding size limits). We’ll talk you through what applies to your property and help you understand the best route before any work starts. We serve Borehamwood and can advise based on common local requirements.

What’s included in your project management (and why does it matter)?+

We manage the whole build from start to finish—scheduling trades, coordinating deliveries, maintaining timelines, and keeping communication clear. That means you don’t have to juggle multiple contractors or chase updates. We’ll plan the work to reduce disruption, keep the site organised, and make sure the extension is delivered efficiently and safely.

Will the extension be warm in winter and comfortable in summer?+

Yes—comfort and efficiency are built into how we work. We use highly insulated construction and quality materials to help keep heat in during winter and reduce overheating in summer. We’ll also make sure the new space blends properly with your existing home, with a clean, seamless finish.

How much disruption should we expect while the extension’s being built?+

Any building work creates some disruption, but we’re set up to keep it to a minimum. Our streamlined approach, clear scheduling, and professional site management help reduce noise, dust, and downtime. We’ll agree working hours, keep access routes tidy, and keep you informed so you can plan around each stage of the build.

Where we work

Building house extensions across Borehamwood

Looking for a service other than Extensions in Borehamwood?

We also offer porch installation to homeowners across Borehamwood, delivered with the same craftsmanship, insulation and end-to-end project management.

Porch Installation in Borehamwood

Not in Borehamwood? Still looking for Home Extension Builders near me…?

Ready to add space to your home?

Book a free, no-obligation consultation and we'll give you clear timelines, coordinated trades and a smooth, low-disruption build.