# JMB Design & Build

JMB Design & Build is a builder in Potters Bar. Rated 5.0/5 from 34 public reviews across 1 review source. This is the MyTrustedTraders public-evidence profile for this trader, with independent reviews, credentials and registry data from named public sources, no ads, and no paid placement.

Trust Score: 43 out of 100 (building a public record). The score rests on rated 5.0 from 34 reviews.

## 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.

## Public review evidence (by source)
| Source | Average rating | Reviews |
| --- | --- | --- |
| Houzz | 5.0/5 | 34 |

Rated 5.0, in line with the local average for builders in Potters Bar. Across 22 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.

## Trades
Builder

## Services they list
_Listed on public sources or the business's own website; check directly that they cover your job before you book:_
- Architectural Design
- Architectural Drawings
- Building Design
- Complete Kitchen Renovation
- Eco Homes
- Foundations Construction
- Garage Building
- Home Renovation
- House Extensions
- House Plans
- House Restoration
- Kitchen Design

## Awards & recognition
- 5× Best of Houzz winner (2026, 2025, 2024, 2023, 2022)

## What we checked, and when
_What MyTrustedTraders independently checked for this business (verified items only):_
- Review volume: MyTrustedTraders shows 34 public reviews on this profile. (via MyTrustedTraders public listing)
- Public listing spread: MyTrustedTraders shows 1 public listing for this trader. (via MyTrustedTraders public listing)
- Business identity: MyTrustedTraders shows public business identity data with operating status unknown. (via MyTrustedTraders public listing)
- Contact phone: MyTrustedTraders shows a public phone contact on this profile. (via MyTrustedTraders public listing)
- Website: MyTrustedTraders shows a public website for this trader. (via MyTrustedTraders public listing)
- Current credentials shown: MyTrustedTraders shows 1 current credential on this profile. (via Public credential evidence)

Full verification checklist: https://mytrustedtraders.com/traders/jmb-design-build/checks

## Credentials & sources
- Credentials shown: 2 (1 currently verifiable, listed below)
  - Federation of Master Builders: the Federation of Master Builders: members are independently inspected and can offer an insurance-backed warranty 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.
- Companies House status: Unknown
- Evidence held from: Houzz, Federation of Master Builders, Waste carrier (Environment Agency)
- Public evidence last checked May 2026

## What this business says about itself
_Self-declared on the trader's own website, not independently verified:_
- Emergency availability: 24 hours
- VAT number they state: GB 320216363 (check on the HMRC VAT checker: https://www.gov.uk/check-uk-vat-number)

## Before you hire a builder
_What to check when choosing this kind of trade (general guidance, not a claim about this business):_
- 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.
- Ask to see a portfolio of completed work like yours, plus recent references you can contact.
- Check the credentials and registrations that matter for this work, and that they are current.

## Contact
- Phone: 07908 815645
- Website: http://www.jmbdesignandbuild.co.uk

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Source: MyTrustedTraders, https://mytrustedtraders.com/traders/jmb-design-build
Real public evidence only: every figure traces to a named source, with evidence held from 3 named public sources. If a source does not carry a field, it is not shown.