House Extensions · Hitchin

House Extensions in Hitchin

We’ll deliver your beautifully insulated home extension fast—managed end-to-end with craftsmanship you can trust in Hitchin.

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

Expert project management
Family-owned, 20+ years
Fast extensions: 3–5 weeks
Highly insulated builds
5-star customer satisfaction

Trusted house extension builders serving Hitchin

The Home Extension Company delivers high-quality house extensions for homeowners across Hitchin, combining reliable project management with craftsmanship-driven builds that are designed to feel like a natural part of your home. From the initial consultation to final handover, an experienced team coordinates every trade, keeps timelines clear, and communicates throughout to ensure a smooth, low-disruption experience. As a family-owned company with over 20 years of experience, The Home Extension Company is known for an honest, customer-focused approach and 5-star service, with streamlined methods that can complete many extensions in as little as 3–5 weeks. Every extension is constructed using premium materials and modern, highly insulated systems for year-round comfort, excellent energy efficiency, and a clean, seamless finish.

Open-plan house extension in Hitchin 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 Hitchin extension today

Let’s talk about your plans—get in touch today for a no-pressure consultation and we’ll give you a clear timeline, honest guidance, and a smooth build from start to finish.

Get a free quote 01727 224616

Recent work

House extensions we've built in Hitchin

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

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

Our house extension services in Hitchin

At The Home Extension Company, we help you expand your home with a house extension that fits your lifestyle, adds real value, and blends seamlessly with what you already love about your space. We’ll guide you from the first ideas and measurements through planning support, clear timelines, and tidy, well-managed building work, so you’re never left guessing what’s happening next.

Because we’re reliable, craftsmanship-driven, and customer-focused, you can count on solid construction, quality finishes, and honest communication throughout the build. If you’re planning a bigger kitchen, an extra bedroom, or a light-filled family area, we’ll tailor the design and build to your needs and keep disruption to a minimum while we work.

We serve Hitchin, and we’re here to make your extension straightforward, stress-reduced, and built to last.

Why choose us for your Hitchin house extension

Our Hitchin 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 Hitchin? Tell us about your project.

Reliable House Extensions in Hitchin — Built on Trust, Delivered on Time

We know a house extension isn’t just another project — it’s your home, your routine, and your budget on the line. That’s why, when we’re serving Hitchin, we focus on being reliably consistent from day one: clear expectations, honest advice, and a steady team that treats your space with respect. As a family-owned and operated company with 20+ years of experience, we’ve built our name by turning up when we say we will, doing what we say we’ll do, and keeping you informed so you’re never left guessing.

Reliability also means planning properly so the build feels controlled, not chaotic. For example, imagine you’ve got a growing family and you need a rear extension with a bigger kitchen-diner — but you can’t move out. We’d agree working hours with you, protect access routes, and stage the work so you can still use key areas of the home while we progress. We’ll keep you updated at each milestone, and if anything unexpected crops up, we’ll talk it through straight away and agree the next steps together.

To make the process dependable from start to finish, we stick to three simple promises: we’ll provide a clear plan and realistic timeline before we start, we’ll keep communication straightforward and regular throughout the build, and we’ll maintain tidy, respectful working practices so your home stays as liveable as possible. When you choose The Home Extension Company for your house extension in Hitchin, you’re choosing a team that values reliability as much as the finished result.

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

House extensions that add living space in Hitchin

When your home starts to feel tight, we’ll help you claim the breathing room you’ve been missing with a house extension that feels like it was always part of the original build. We’re talking about a bigger kitchen that can handle weekday rushes and weekend dinners, a family room where you’re not sidestepping toys and furniture, or a calm new corner that finally gives everyone space to spread out. Done well, extra square footage doesn’t just add room—it changes how your whole home flows from morning to night.

We build for comfort as much as size, using highly insulated construction that keeps your new space warm in winter, cool in summer, and quietly comfortable all year round. With premium materials and modern techniques, we’ll create extensions that hold heat, reduce draughts, and feel solid underfoot—no flimsy finishes or echoey rooms. Think bright, welcoming interiors with clean lines, snug temperatures, and an energy-efficient envelope that helps your home perform better, not just grow bigger.

Quality craftsmanship is what makes “more living space” feel seamless, and we’re meticulous about the details that your eyes and hands notice every day. We’ll align rooflines and brickwork so the extension complements your existing home, refine junctions and trims for a crisp finish, and plan layouts that make moving through the space feel natural. If you’re looking for a house extension that serves Hitchin and the surrounding area, we’ll deliver extra room that looks right, feels right, and works beautifully for the way you live.

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

Highly insulated house extensions in Hitchin

We’ve all felt it: the walls closing in, the clutter multiplying, and the constant sense that your home is one room short of perfect. A house extension isn’t just “more space” — it can feel like you’ve finally hit the reset button on daily life. Suddenly, the chaos has somewhere to go, mornings stop feeling like a marathon, and your home starts working for you instead of against you.

With The Home Extension Company, we don’t let your project drift into the dreaded limbo of delays, crossed wires, and half-finished promises. We professionally manage every step, keeping you informed throughout the build, coordinating every trade, and protecting your timeline like it’s gold. We serve Hitchin with a team that treats disruption like the enemy — because your home should still feel like home while the transformation happens.

Picture the difference it makes when your extension becomes the heartbeat of the house: a light-filled kitchen-diner where dinner feels like an event, not a chore; a calm, private home office that makes workdays feel effortless; a spacious family room where laughter doesn’t bounce off cramped walls. We’ll help turn that “one day” dream into something so real you’ll wonder how you ever lived without it.

Fast house extension builds in Hitchin

We know you want more space without putting your life on hold. That’s why we focus on efficient house extensions that can be completed in as little as 3 to 5 weeks, so you’re not living around a building site for months. With a faster, well-managed build, you can keep routines steadier and start enjoying the extra room sooner.

We also know budget matters just as much as speed. Our modern construction methods help keep labour costs down, which means we can deliver exceptional quality at a competitive price—without cutting corners on the finish. You get a smart, durable extension that adds real value and feels like it’s always been part of your home.

Whether you’re planning a larger kitchen, a family room, a home office, or simply extra living space, we’ll help you make it happen with a straightforward process and a clear timeline. We serve Hitchin, and we’re used to working in occupied homes—so we plan carefully to reduce disruption while delivering an extension you’ll want to use every day.

Inside our work

Inside our finished extensions in Hitchin

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

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

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

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

House extension FAQs for Hitchin

How long does a house extension usually take?+

Most extensions vary depending on size, access, and complexity, but we specialise in fast home extensions and can complete many projects in as little as 3–5 weeks. We’ll confirm a clear programme after the initial consultation and keep you updated throughout, so you always know what’s happening next.

Do we need planning permission for a house extension?+

Not always. Some extensions can be carried out under permitted development, while others need full planning permission—it depends on your property type, the extension design, and local rules. We’ll talk you through what’s likely required and help you understand the best route before work starts for homes we serve across Hitchin.

What’s included in your project management during the build?+

We handle the day-to-day coordination so you don’t have to. That means we schedule and manage every trade, keep timelines on track, maintain site organisation, and keep communication clear from start to finish. We’ll keep you informed throughout the build and work to minimise disruption to your home.

Will the extension match our existing house and feel like a seamless part of it?+

Yes—that’s always the goal. We focus on quality craftsmanship and a clean finish so the new space blends with your home’s style, layout, and materials. We’ll discuss details like brickwork, rooflines, windows/doors, and internal finishes early on to make sure everything ties together properly.

Will the extension be warm, energy-efficient, and comfortable year-round?+

Absolutely. We build using highly insulated construction and modern methods designed for excellent thermal performance. That means your new space should feel comfortable in winter and summer, help reduce heat loss, and deliver an extension that performs as well as it looks.

Where we work

Building house extensions across Hitchin

Looking for a service other than Extensions in Hitchin?

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

Porch Installation in Hitchin

Not in Hitchin? 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.