Bristol Builders · Established 10+ Years

Building Better
Homes Across Bristol

Trusted local builders specialising in extensions, HMO conversions, loft conversions and bespoke brickwork — delivering exceptional craftsmanship to homeowners and property investors throughout Bristol and the surrounding areas.

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FMB Member City & Guilds Qualified Gas Safe Registered NIC EIC Approved Fully Insured
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FMB Master Builders
City & Guilds Qualified
Considerate Constructors
Gas Safe Registered
NIC EIC Approved
About Hallett Construction

A Bristol family of builders delivering on every promise.

For over a decade, Jason and the Hallett Construction team have transformed hundreds of Bristol homes — from single storey kitchen extensions and loft conversions through to ambitious 9-bedroom HMO developments in Filton. Every project we touch is delivered to the highest possible standard, on time and within budget.

Our in-house team of skilled builders, bricklayers, electricians and Gas Safe engineers means we manage your project end-to-end with one accountable team — not a chain of subcontractors. Federation of Master Builders accredited, NIC EIC approved and fully insured. Free professional estimates always provided.

Fully Accredited

FMB, Gas Safe & NIC EIC registered

10+ Years

Bristol building experience

HMO Specialists

8 & 9-bed conversions delivered

Free Estimates

Professional, no-obligation quotes

Speak to Jason
Bristol home extension by Hallett Construction
10+
Years Building Bristol
What We Do

Building Services Across Bristol

From single storey kitchen extensions to multi-bedroom HMO conversions and bespoke brickwork — Hallett Construction delivers every type of building project to the highest possible standard.

Home extensions Bristol
Most Popular

Home Extensions

Single and double storey, kitchen, bathroom and wrap-around extensions — designed and built to add space, light and serious value to your Bristol home.

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HMO conversions Bristol Filton
Specialist

HMO Conversions

8 and 9-bed HMO projects across Filton and Bristol with full HMO licensing compliance.

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Loft conversions Bristol

Loft Conversions

Hip to gable, dormer and full design-build loft conversions — turn unused roof space into a beautiful new bedroom or office.

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Garage conversions Bristol

Garage Conversions

An affordable way to extend your home — convert your garage into a usable living space, home office or playroom.

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Knock through structural openings Bristol

Knock Throughs

Wall removal, structural openings and open-plan conversions to transform the layout of your home.

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Brickwork Bristol bricklayers

Specialist Brickwork

Impeccable brick-built construction by experienced Bristol bricklayers — any size project, any style.

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Planning and design Bristol
Design & Build

Planning & Design

Complete design and build packages with full planning application management — we take care of everything from initial sketches through to handing you the keys.

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Our Portfolio

Recent Bristol Projects

Hundreds of Bristol homes transformed into forever homes — extensions, HMO conversions, full refurbishments and granny annexes.

9-bed HMO conversion Filton
Filton, Bristol

9-Bed HMO Conversion

 Double storey extension Bristol
Clifton, Bristol

Double Storey Extension

 Kitchen extension knock through Bristol
Bedminster, Bristol

Kitchen-Diner Knock Through

 Loft conversion dormer Bristol
Henleaze, Bristol

Hip-to-Gable Loft Conversion

 Granny annexe Bristol
Westbury-on-Trym, Bristol

Bespoke Granny Annexe

 Full house refurbishment Bristol
Redland, Bristol

Full 5-Bed House Refurbishment
10+
Years Trading
500+
Bristol Projects
100%
5-Star Rated
9-Bed
Largest HMO
Get In Touch

Request your free professional estimate

Tell us a little about your project and Jason will be in touch within one working day with a free, no-obligation estimate.

Free professional estimates · No obligation · Bristol & surrounding areas

Hallett Construction Bristol builders

Speak to Jason directly

Free, no-obligation estimates across Bristol and surrounding areas.

📞 0117 2510 179
Property investor services Bristol
For Property Investors

Building services tailored to property investors.

We work with landlords, developers and BTL investors across Bristol — turning underperforming properties into high-yield HMOs and refurbished rentals. Our specialist HMO compliance knowledge and ability to manage entire builds end-to-end makes us the trusted choice for portfolio builders.

  • Full HMO licensing compliance & fire safety
  • 8 and 9-bed HMO conversions delivered in Filton
  • End-to-end management — design, build & planning
  • On-time, on-budget delivery — every time
Investor Property Services →
What Bristol Says

5-Star Recommendations

Every published Hallett Construction testimonial is a 5-star review. Here's what our Bristol clients say about working with Jason and the team.

★★★★★

"Jason and the team completed my extension. The build quality was fantastic, even better than I could have imagined and at a very reasonable rate. They managed the project well and I never once had a worry that they wouldn't meet the very tight deadline. Would definitely recommend them and use them again on my next project. Great workers and nice guys to go along with it as well."

RB

Robert Burton

Extension Project
★★★★★

"Hallett Construction put a lot of hard work in to building my extension. I nearly lost all faith in builders after previous encounters, but Jason and his team made my dream come true and fixed their appalling work! I absolutely love my new extension and would highly recommend you to anyone I know. Quick, reliable and a realistic price. Thanks again!"

EG

Elisha Giddings

Extension Rescue
★★★★★

"Jason and his team were very professional when knocking through a wall to make it a kitchen/dining room. They done a great job and were very efficient."

SP

Sophie Porter

Knock Through
★★★★★

"I had a full 5 bed house refurb carried out by Hallett Construction to a very high standard. All of them were so polite and kept the site tidy and safe at all times. Keep the great work up!"

JT

Jack Tottle

5-Bed Refurbishment
★★★★★

"Very good company, was a pleasure dealing with you all, thanks for the lovely driveway."

RD

Ryan Dowding

Driveway Project
★★★★★

"Fantastic job of designing and building my granny annexe at the bottom of the garden. My mum loves it and thanks again."

EB

Emma Baker

Granny Annexe
From The Blog

Building Insights & Advice

Practical advice from our team on extensions, conversions and everything you need to know before starting your Bristol project.

Hip to gable loft conversion
Loft Conversions

How Long Does a Hip to Gable Loft Conversion Take?

Considering a hip-to-gable loft conversion? Our complete guide breaks down the typical timeline, what to expect at each stage, and the factors that can affect how quickly your conversion is completed.

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Loft conversion minimum height
Loft Conversions

What Is the Minimum Height for a Loft Conversion?

Wondering whether your loft is tall enough to convert? We explain the minimum head-height requirements, how they're measured, and what your options are if you fall short of the required clearance.

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Free Professional Estimates

Ready to start your Bristol project?

Whether it's a single storey kitchen extension, a 9-bedroom HMO in Filton, or a granny annexe at the bottom of the garden — Hallett Construction delivers on time and within budget.

Get Your Free Estimate 📞 0117 2510 179
0117 2510 179 info@hallettconstruction.co.uk