Homeowner

Review a tradeHomeowner advice centreFind your expertSaved trades

Trades

Join CheckatradeAdvice centreLog in to member's area
Leave a reviewDownload app
Trade cover image
Trade profile image

See all photos

Onyx Builder Ltd

10/10

Swindon, Wiltshire

Checkatrade member since October 2022

Request a quote

Services

  • Wall Tie Replacements
  • Brick / Concrete Structural Repairs
  • Concreting
  • General Building
  • New Builds
  • Fire and Flood Renovation
  • Partition Walls
  • Agricultural Building
  • Basement / Cellar Conversions
  • Extensions / Conversions
  • Loft Conversions
  • Period Property Restoration
  • Project Management
  • Refurbishments
  • Sustainable Construction
  • Suspended Ceilings
  • Building Merchants
  • Property Maintenance / Repair
  • Cladding
  • Car Ports
  • Mastic Sealant
  • Workshop Design / Construction
  • Equestrian Stable
  • Garage Conversions
  • Stretched Ceilings
  • Foundations
  • Tree Houses
  • Heritage Property Specialist
  • Repair and Listed Building Specialist
  • Warehouse Racking
  • Insurance Claim Specialist
  • Structural Steels
  • Diamond Drilling
  • Structural Design
  • Steel Fabrication
  • Steel Work Design
  • Garden Studios
  • Concrete Garages
  • Green Oak Framing
  • Demolition
  • Core Drilling
  • Emergency Builder Service

Customer Reviews

Write a review

10 /10

Based on 5 reviews over the past 12 months

Quality of work

10

Reliability

10

Communication

10

Reviews (36)

  • Marcus K
    10

    Created two soundproofed rooms with vaulted ceiling, mezzanine, flooring, plastering, decorating.

    Posted 15 July

    I couldn’t be happier with Onyx. This was my first building project and first time using tradespeople. I only had a rough sketch for two rooms with a high vaulted ceiling. Onyx delivered far more. Florin and his team did a full job with soundproofing, flooring, plastering, decorating, electrics, doors with locks, plus helpful extras. Florin even suggested a storage mezzanine which is brilliant. He saw the vision early, gave great advice and flagged issues ahead. The team were punctual, tidy, considerate to neighbours and my housemate, and did extremely high standard work. Would recommend!
    Verified reviewer
    Job location: SN15
  • 10

    The #1 builder in Swindon!

    Posted 26 June

    Florin and his team are THE best in Swindon! He worked meticulously on our extension and was always super polite, clean and all aspects of his work are top craftsmanship and I will be using Onyx Builder again! A+++
    Job location: SN2
  • 10

    Great work and recommend to others

    Posted 25 June

    Highly recommend Florin and his team. Very impressed with the work they carried out and will be sure to use him again in the future Thank you again for everything and very happy with the finished project
    Job location: SN2
  • Tracey P
    10

    full renovation of bedroom, including adding stair bannister and stair cladding

    Posted 21 March

    Florian and his team are so professional and meticulous. Communication was clear, they asked questions along the work journey. On a personal note, the team are friendly, approachable and very diligent. I would highly recommend (and I'm not easy to please!)
    Verified reviewer
    Job location: SN1
  • 10

    kitchen installation

    Posted 13 December 2025

    I’m very happy with the kitchen installation. The onyx builder ltd did a great job and the finish looks excellent. Everything was installed neatly and with care, and the end result is exactly what I was hoping for. Professional, reliable, and easy to work with. I would happily recommend them to others.
    Verified reviewer
    Job location: SN1
  • 10

    Repairs sagging ceiling

    Posted 12 August 2025

    Very professional and high quality of work
    Verified reviewer
    Job location: SN3

Photos

+39

Company Info

Owner

Mrs Ana Marku

Ltd Company

4 years on Checkatrade

VAT Registered

No

24 Hour Call-outCards AcceptedCommercial WorkFree EstimatesInsurance Work UndertakenDomestic Work

At Onyx Builder Ltd our mission is to provide quality constructions and to create special places for living, working, and playing.

We will strive to implement a long-term relationship with our clients, based on safety, quality, and timely services, exceeding their expectations and gaining their trust through exceptional performance by every member of the team.


Onyx Builder Ltd offers a full range of quality building services in the Swindon, Wiltshire area.


Our team can help you with:


· House Renovation

· Plumbing

· Flooring and Tiling

· Loft Conversion

· Carpentry

· Extension

· Roofing

· Painting and Decorating

· Driveways and Patios

· Kitchen and Bathroom

· Decking

· Shed

· Garages

We look forward to working with you, Please get in touch.

This trade passed up to 12 Checkatrade vetting checks

Member since October 2022

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