Diamond Builder Ltd

Diamond Builder Ltd: Harrow-based renovation and construction specialists

Diamond Builder Ltd is a construction and renovation company based in Harrow, London, operating since 2012. The firm describes itself as a specialist in bespoke kitchen and bathroom renovations, home extensions and loft conversions, and presents a portfolio of completed projects in Harrow, Stanmore and Pinner. Its stated approach combines planning, communication and execution, with an emphasis on in-house teams rather than random subcontractors.

Core renovation services

The company's service range covers four main areas of residential work:

• Luxury kitchens: bespoke high-end kitchen installations, including structural alterations and premium plumbing.
• Bespoke bathrooms: luxury spa-like bathroom renovations with expert waterproofing, underfloor heating and detailed finishes.
• Home extensions: architectural extensions intended to add space and value, including double-storey projects.
• Loft conversions: complex Mansard, Dormer and skylight loft conversions.

The site also lists tiling and full refurbishment among the project types available through its quote request form.

Experience and project record

Diamond Builder states that it has delivered over 200 projects and served more than 100 clients, with a 5.0 rating on Google based on 25 or more reviews. The company reports more than ten years of construction experience across London. Featured projects include a complete renovation with a modern open-plan kitchen in Harrow, a spa-inspired bathroom in Stanmore and a rear bi-fold extension in Pinner.

Insurance, compliance and in-house team

The firm states that it carries public liability insurance up to £5 million and employer's liability insurance, and that it complies with UK building regulations and health and safety standards. It emphasises that its core team is in-house, which it presents as a guarantee of quality. The company also indicates that it works with experienced architects and can guide clients through the planning permission process.

Coverage area

Diamond Builder is based in Harrow and primarily serves North West London, including Stanmore, Pinner, Hatch End, Edgware, Wembley, Ruislip and surrounding areas. It also takes on projects across Greater London for larger builds.

Client feedback and project timelines

The website displays a 5.0 rating based on 25 or more reviews and includes testimonials from homeowners. One client mentions a bathroom renovation, another a kitchen remodel, and others refer to garden renovation and general refurbishment. The company provides indicative project durations: bathroom renovations typically take 2-3 weeks, kitchen renovations 3-5 weeks, loft conversions 6-8 weeks and home extensions 8-14 weeks. It states that a detailed timeline is provided before work begins.

Quotes and cancellation terms

Diamond Builder offers free, no-obligation quotes and states that it responds within 24 hours. The site notes that a £180 cancellation fee applies if a client cancels after the deposit has been paid and work has started.