About Thima Green Ltd | Loft Conversion | House or Home Extension in London

 Bromley Loft Conversions, Home Extensions & Design-and-Build

Thima Green Limited is a Bromley-based building company specialising in loft conversions, home extensions, renovations and new builds across Bromley, Beckenham, Chislehurst and South-East London. As a Checkatrade-approved team, we’re known for clear communication, tidy sites and high-quality workmanship from start to finish.

From local handyman service to full build projects

Thima Green started as a local handyman service, helping homeowners in Bromley with repairs, improvements and small building jobs. Through consistent quality and word of mouth, we grew into a complete building service — and today we deliver full loft conversions and home extensions, alongside larger refurbishments and new build projects. The same approach remains: do the job properly, respect the customer’s home, and keep things organised and transparent.

Complete service: design, planning support and construction

We provide a complete design-and-build service, including full architectural and structural design. We work with trusted Bromley and Beckenham architects and structural engineers to produce architectural drawings, structural calculations, and supporting documents for planning and Building Regulations. This joined-up process helps keep projects efficient, compliant and well managed from day one.

What we do

• Loft conversions (dormer, hip-to-gable, mansard and more)
• Rear extensions and side extensions (including side return and wraparound options)
• New builds and structural alterations
• Outbuildings / garden rooms (home offices, gyms, studios, playrooms, summer houses)
• Renovations and refurbishments, including kitchens and bathrooms

Why choose Thima Green Limited

• 15+ years’ experience across residential construction
• Checkatrade-approved team and trusted local reputation
• Clear communication, practical advice and organised project delivery
• End-to-end coordination of trades, timelines and key stages
• Free, no-obligation quotes and straightforward guidance

No project is too big or too small. Whether you’re planning a loft conversion in Bromley and Beckenham, a home extension in Beckenham and Bromley, or a wider renovation, we’re here to help from the first conversation through to completion.

If you’d like to see examples of our previous work, just ask — we’ll be happy to share recent projects. To discuss your plans and arrange a free estimate, please get in touch.

Loft extension and house refurbishment.

“Loft extension: created a new bedroom, installed custom made cupboards/wardrobes plus a new bathroom. The remainder of the house renovation works involved new kitchen and renovating dining area, demolition of chimney breast from top to bottom, renovating the second and third bedroom. Project management of the whole project has been amazing, stress free, very thorough with detail. A building company who takes pride in their work and treats each project like their own home, highly recommend them. Keep up the excellent work!”

Customer in Beckenham

Installation of staircase to the loft.

“The staircase was tailored made to my property and was built on site. The staircase was built well and the climb is not steep. Am happy with the staircase.”

Customer in Beckenham

Ground floor toilet and utility room installation.

“Thoughtfully done with perfect finish.”

Repeat Customer in Bromley