Trade cover image

J-Build

9.75/10

London, Greater London

Checkatrade member since September 2025

Services

  • Extensions / Conversions
  • Garage Conversions
  • Garden Studios
  • General Building
  • Loft Conversions
  • Refurbishments
  • Property Maintenance / Repair
  • Period Property Restoration
  • Steel Work Design
  • Structural Design
  • Structural Steels
  • Foundations
  • Demolition
  • Concreting
  • Cladding
  • New Builds

Customer Reviews

Write a review

9.75 /10

Based on 4 reviews over the past 12 months

Quality of work

9.75

Reliability

9.75

Communication

9.75

Reviews (9)

  • 9

    Professionalism

    Posted 09 September

    John and his team at J-Build were professional, reliable, and delivered exactly as promised. The quality of their work was excellent, and any aftercare or follow-up repairs were handled smoothly and to a high standard. I would highly recommend J-Build to anyone looking for dependable and skilled builders.
    Verified reviewer
    Job location: NW6
  • 10

    Reliable, supportive, diligent, hard-working. A man of integrity.

    Posted 05 September

    Jon and his team completed a back and front extension, a loft conversion, and a total gutting of the original property. Throughout the project Jon communicated clearly, supported us with decisions, explained the process and worked with us to create the home of our dreams. Jon was flexible and understanding, and quickly became a firm favourite amongst our kids, who still ask to see him whenever possible! We are enormously grateful to him and his team for everything they did to help our dream become a reality.
    Verified reviewer
    Job location: NW7
  • 10

    Structural building works

    Posted 05 September

    J-Build were excellent from start to finish. They explained what was required, and kept us updated throughout the build.
    Verified reviewer
    Job location: NW7
  • 10

    Excellent Builder !

    Posted 05 September

    John as an exceptionally good builder who takes great care in the work that he does . He and his excellent team are extremely professional and courteous at all times and Is always willing to go the extra mile when required . I am very happy to recommend him .
    Verified reviewer
    Job location: NW6
  • 10

    Full refurbishment of a 4 bed house

    Posted 08 November 2017

    I am very happy with the work.
    Verified reviewer
    Job location: NW9
  • 10

    Full refurbishment

    Posted 07 November 2017

    I would definitely recommend him and will be using him again.
    Verified reviewer
    Job location: RM10

Photos

Company Info

Owner

Mr Ioan Ursachi

Ltd Company

Member since 2025

VAT Registered

Yes: 276065978

Free EstimatesDomestic WorkCards AcceptedCommercial WorkInsurance Work Undertaken

J-Build will transform, modernise, extend, refresh or rebuild your property with expert planing and design, professional operators, masters of their crafts at competitive rates!

We will take you to visit some of our sites before you make a decision on the free no obligation quotes given for your project and a written guarantee for immaculate finishes will be included in our signed contracts!

Full insurance covers all projects undertaken and a professional site manager/project manager will plan and coordinate the works required!

We undertake any aspect of work on domestic buildings from decorating, kitchen and bathroom fitting, loft conversion, plumbing, house extensions, paving, full refurbishment, paving, landscaping and much more!

Do not hesitate to call us for a friendly and professional service!

Big enough to cope - small enough to care!

J-Build

This trade passed up to 12 Checkatrade vetting checks

Member since September 2025

Individual checks

  • Identification

  • Proof of address

  • Financial

  • Qualifications and accreditations

  • County court judgement

  • Open source media

Business checks

  • Customer Reviews

  • Company trading history

  • Company duplication

  • County court judgement

  • Enhanced business check

  • Director checks

More tradespeople