Public evidence profile · Checked May 2026

JMB Design & Build

BuilderPotters Bar5.034 reviews · 1 independent public source
Credentials & registries
2 credentials shown
Awards & recognition
1 independent award
Trust Score
43out of 100
Building a public record
  • Rated 5.0 from 34 reviews
  • 2 credentials shown

Worth checking: TrustMark

How this score is worked out
Rating5.0 / 5
Review volume34
Independent sources1 independent public source
Credentials2 credentials shown

How this score is made up

What customers say33.1 of 60
Independent checks8.9 of 30
Track record1.3 of 10
See the independent checks
  • Licences and credentials4.6 of 10.3
  • Ways to reach them3.4 of 3.4
  • Reviewed on more than one site0 of 5.1
  • Registered company details0 of 5.1
  • Photos of their work0 of 4.3
  • Industry recognition0.9 of 1.7

Missing evidence lowers the score because we can't check it. It doesn't mean it doesn't exist. Claiming a profile never changes the score. Evidence context, not a guarantee of workmanship.

Contact on Houzz (opens in new tab)
Trust at a glance

What we can verify about JMB Design & Build

2 checks

Each card sums up one thing we can check from public sources. Open it for the full detail and the named source. This is evidence context, not a guarantee.

Credentials & registries2 credentials shownSee detail →Awards & recognition1 independent awardSee detail →
See the full verification checklist for JMB Design & Build →
Credentials and checks

Credentials, licences and vetting

Credentials and associations

Credentials and memberships

2

These credentials and memberships are attributed to named public sources. Check the source before relying on them.

Federation of Master BuildersCurrent: Passed
Source reference
j-m-b-design-build-ltd
Source checked
11 Jul 2026

What this protects you with: As a member of the Federation of Master Builders, you get independent vetting of the builder, the option of an insurance-backed warranty on the work and access to a dispute resolution service.

Open this source entry (opens in new tab)
Independent recognition

Awards & recognition

5× Best of Houzz winner (2026, 2025, 2024, 2023, 2022)

Best of Houzz is an annual award from the home-renovation platform Houzz, given to the professionals its community rates most highly for design or customer service.

View award source (opens in new tab)

These are independent third-party awards: recognition earned from review communities and trade bodies, never paid placement.

Source-listed gallery

Photos listed on Houzz

1 photo

These sources do not label every image as completed work. The gallery may include projects, people, logos or certificates, so it does not count as completed-work evidence.

Reviews · public evidence

What customers say

These review totals are published independently on the named public source below, not testimonials this business chose to show. We show the aggregate rating, review volume, and source attribution we hold so you can weigh the evidence yourself.

5.0out of 5
34 reviews in public evidence
Where these reviews are published
  • Houzz34 reviews · 5.0 avg
Local context

Rated 5.0, in line with the local average for builders in Potters Bar

Across 27 builders in Potters Bar, the typical rating is 5.0 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.

Sources

Where this information comes from

4 named public sources

Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.

Review sources

Registers and membership directories

Business and public registers

Public evidence last checked May 2026

About

JMB Design & Build is a full service building construction company dedicated to building and improving residential and commercial structures according to client needs and desires. Owned and managed by James Boulton, himself and his team have over 25 years of experience in the industry with qualifications in carpentry, plastering and bricklaying. Based in Hertfordshire, the team at JMB is ready to give your space whatever updates it requires. Our skilled team of builders adopt a thorough approach to ensure every renovation project we undertake is delivered on time, budget and to the highest standard. Whether you want to update a tired looking property or just want to modernise a single room (Kitchen or Bathroom) we can provide you with a huge range of renovation solutions to revive your home. Just give us a call or enquire online today and we’ll get back to you as soon as we can with a quote.

Services they list

Architectural DesignArchitectural DrawingsBuilding DesignComplete Kitchen RenovationEco HomesFoundations ConstructionGarage BuildingHome RenovationHouse ExtensionsHouse PlansHouse RestorationKitchen Design

Listed on public sources or the business's own website; check directly that they cover your job before you book.

What this business says about itself
From their own website

What this business says about itself

These are statements the business makes on its own website, worth confirming in writing (and on the official registers) before you hire, not independently verified by us.

Your own checks

What to check before you hire

Worth checking yourself
Their public evidence comes from a single source. Look them up on another site before deciding.
Verify at the sourceCheck them yourself

This trade isn't licensed in the UK, so anyone can set up. TrustMark is the only Government-endorsed quality scheme for work in and around the home - check whether they're registered, or find a TrustMark-registered business.

Check the TrustMark register
Never pay a large deposit up front. Agree a staged payment schedule tied to completed milestones, and hold a small retention until snagging is done.
Get it in writing: an itemised quote with scope, materials, start and finish dates, and how any changes (variations) will be priced.
Be wary of a cash-only price or pressure to start tomorrow. Both are red flags for an unaccountable job.

Want an extra legitimacy check? Run the Cowboy Checker on JMB Design & Build before you contact them.

Run Cowboy Checker →
Good to know

Common questions about JMB Design & Build

Is JMB Design & Build a legitimate business?

JMB Design & Build has 34 independent public reviews, rated 5 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.

What do customers say about JMB Design & Build?

JMB Design & Build has 34 public reviews, averaging 5 out of 5. The reviews section shows the aggregate rating, review volume, and review source information we hold.

How do I know JMB Design & Build's reviews are genuine?

JMB Design & Build's 34 public reviews come from a named public review source. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show the review source information and aggregate rating we hold rather than selling rankings, so you can weigh the evidence for yourself.

Is JMB Design & Build qualified and accredited?

We hold 2 independently sourced credentials for JMB Design & Build, including Waste carrier (Environment Agency), Federation of Master Builders. Each is attributed to the body that issued it in the credentials section. For example, Waste carrier (Environment Agency) is the Environment Agency: the regulator a trader must register with to carry waste or hold an environmental permit in England.

Has JMB Design & Build won any awards?

JMB Design & Build holds 1 independent award, including 5× Best of Houzz winner (2026, 2025, 2024, 2023, 2022). These are third-party awards: recognition that has to be won, not self-issued.

What does JMB Design & Build specialise in?

JMB Design & Build lists specialist services including Architectural Design, Architectural Drawings, Building Design, Complete Kitchen Renovation, Eco Homes, Foundations Construction. If your job is one of these, look for it in their listed services or ask them to confirm for your project.

Compare your options

More builders in Potters Bar

These options match the same trade in Potters Bar. Compare the public evidence on each profile before you decide.

See all builders in Potters Bar