Builders in Hertfordshire · Stevenage & Beyond

Transform Your Home with Ambitious Architecture and Unwavering Trust

Luxury home extensions and personalised renovations where the flow of how your family lives comes first. As trusted builders in Hertfordshire, we manage every stage in-house — for a stress-free build, start to finish.

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Tailored

Extensions

Bespoke

Renovations

Loft

Conversions

Garden Renovations

Tailored

Extensions

Bespoke

Renovations

Loft

Conversions

Garden

Renovations

ABOUT US

We Are the Guardians of Your Vision.

We aren't just builders; we are renovation specialists who put people first. We listen closely to how your family lives, ensuring every layout and material choice makes your life better. With Build Trust, you aren't just buying a build — you're buying total peace of mind.

10-Year

Workmanship Warranty

FMB

Accredited Members

WHAT WE DO

Spaces Designed Around the Way You Live

As builders in Hertfordshire, we cover everything from extensions and loft conversions to landscaping, driveways and roofing — one trusted contractor for the whole project.

Home Extensions

Single & double-storey extensions that add light, space and value.

Bespoke Renovations

Full home transformations tailored to your lifestyle.

Loft Conversions

Turn unused loft space into a stunning new room.

Living Spaces

Open-plan kitchens and living areas built for real life.

PROOF OF QUALITY

We’re Proud of Our Project Management Service

We provide you with a knowledgeable, consistent point of contact who is available to you every working day from 8am to 4pm, to answer questions promptly and help you make key decisions timely.

Budget Calculator

Plan With Confidence, Right From the Start

Wondering what your project might cost before you pick up the phone? Our quick estimate tool gives you a ballpark range in under a minute, no pressure, no obligation. It's a starting point to help you plan, and if you'd like a precise figure, we'll happily talk it through on a free home visit.

Instant Estimate

What would your extension cost?

Answer three quick questions for an instant ballpark range - built on typical Hertfordshire build costs.

What type of extension?

Single storeyGround-floor extension
Double storeyTwo-floor extension
Wrap-aroundSide + rear combined
Loft conversionInto the roof space

Roughly how big?

20
A typical single-storey rear extension is around 15–25 m².
8 m²80 m²

Where’s the property?

Your ballpark range
£0£0

Want the full breakdown?

Pop in your details and we’ll email a fuller cost breakdown for your project — no obligation, no hard sell.

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This is an automated ballpark estimate based on typical Hertfordshire build costs and is not a quote. Real costs depend on design, specification, site conditions, planning and finish level. For an accurate, no-obligation price, book a free home visit.

PROOF OF QUALITY

The "Built Trust" Process

We combine creative vision with practical problem-solving. Most importantly, we listen — so you get a clear, realistic price and a detailed timeline, and never second-guess the budget.

Step 1

Intelligent Design.

Cost-effective solutions without compromising on a high-end finish.

Step 2

Transparent Planning

No hidden costs or second-guessing. You receive clear timelines and honest answers.

Step 3

Precision Building

Our tight-knit team of polite professionals deliver excellence in every detail.

10-Year

Workmanship promise on every build

Days

Live on-site design turnaround

100%

Project-managed, start to finish

10-Year

Workmanship promise on every build

Days

Live on-site design turnaround

100%

Project-managed, start to finish

Real voices

Homeowners speak about their experience

Ready to secure your home’s future?

Our team is on standby.

FAQs

Transparency is our promise. To the right, we’ve addressed the most common questions our clients ask when planning a luxury renovation. For more specific guidance, our team is always ready to provide the honest answers you deserve.

How do you ensure my project stays on budget and avoid "hidden costs"?

Transparency is our promise; we provide realistic, fixed pricing based on a deep understanding of your goals before a single brick is laid. We focus on intelligent design and practical problem-solving to maximise your budget and avoid the "money pit" scenario common with standard builders.

What if I’m unsure about the design?

Many clients come to us knowing how they want their home to feel, without necessarily knowing how to translate that into a finished design — that is completely normal. We ask the right questions to draw out what matters most: how you live, what you’re drawn to, what you want the space to solve, and what will feel right over time. By understanding both your practical requirements and your personal sense of style, we shape a design that feels considered, natural, and genuinely yours.

How disruptive is the build?

Any building project will bring some disruption; what matters is how well it’s managed. We plan each stage carefully, communicate clearly throughout, and take practical steps to protect your home, keep the site tidy, and reduce unnecessary inconvenience wherever possible.

Are your works guaranteed?

We’re proud to be backed by TrustMark, the UK’s only Government-endorsed quality scheme for trades carried out in and around the home. We also provide a written warranty on materials and workmanship — and if a genuine workmanship issue comes to light years later, we’ll still return and put it right. Our reputation matters deeply to us, and so does the experience our clients have with us.

Why choose Built Trust?

Because the experience matters just as much as the finished result. We combine high standards of workmanship with clear communication, thoughtful planning, and a genuinely attentive approach, so you feel informed, looked after, and confident throughout the project. For us, doing the job properly means being organised, considerate, and straightforward from start to finish.

Get in Touch

Tell Us About Your Space

Send a few details and we'll be in touch to arrange your consultation. Prefer a call? Hit "Relax — We'll Call You" and we'll do the rest.

+44 7480 777 253

25 Town Square, Stevenage, SG1 1BP

Extensions, renovations, and landscaping across Hertfordshire, managed by one team.

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