TRJ Construction Ltd

Granny Annexe Interior
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Short Business Description

TRJ Construction Ltd is a UK firm specializing in the construction of quality garden rooms ,garden office ,man cave and granny annexe using SIP panels

Long Business Description

TRJ Construction Ltd is a UK-based company that specializes in building and designing granny annexes, which are self-contained living spaces designed for elderly parents or relatives who wish to live close to their family members. Here are some features of the granny annexes they create:

  1. Custom design: TRJ Construction Ltd offers bespoke granny annex designs that are tailored to the needs and preferences of the homeowner and their elderly relative. This means that each granny annex is unique and can be customized to suit a range of needs, such as accessibility features, mobility aids, and safety features.
  2. High-quality materials: TRJ Construction Ltd uses high-quality materials in their granny annex construction, including sustainable timber frames, double-glazed windows, and energy-efficient insulation. This ensures that the granny annexes are durable, energy-efficient, and comfortable to use year-round.
  3. Professional installation: TRJ Construction Ltd provides professional installation services for their granny annexes, ensuring that the construction is carried out to the highest standards of quality and safety. This includes ensuring that the annex is structurally sound, well-insulated, and properly wired for electricity.
  4. Planning permission: TRJ Construction Ltd can help homeowners navigate the planning permission process for their granny annex, ensuring that all necessary permits are obtained and that the annex complies with local building regulations.
  5. Customer service: TRJ Construction Ltd provides excellent customer service throughout the entire granny annex construction process, from the initial consultation and design phase to the final installation and handover. They also offer aftercare services to ensure that the granny annex continues to meet the needs of the homeowner and their elderly relative over time.

Overall, TRJ Construction Ltd's granny annexes are a high-quality and customizable option for homeowners looking to provide a safe and comfortable living space for their elderly relatives.

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Business opening hours
Mon-Friday 8:00-17:00
Business Address
39 Rushleigh Avenue
Waltham Cross

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  • American style Granny Annexe
  • Interior Granny Annexe
  • Granny Annexe
  • Garden room
  • Man Cave
  • Garden Office
  • Garden Office
  • Recreation space
  • Bespoke garden room


We sincerely appreciate the exceptional work of TRJ Construction in building our new gym/outbuilding. Their commitment to perfection and pride in their craft sets them apart from the rest. Thank you TRJ Construction for accommodating all our requests and ensuring flawless execution of every detail! From the beginning, their professionalism and expertise were evident. Their valuable insights and experience enhanced the design and functionality of the project. Their attention to detail and craftsmanship were outstanding. Their exceptional design and project management skills ensured timely completion without compromising quality. The team's flexibility and can-do attitude made the experience valuable. We are immensely grateful to Costi, Dani and the team at TRJ Construction for turning our vision into a stunning reality. Their commitment to excellence, pride in their work, and exceptional service have made this project a resounding success. We wholeheartedly recommend TRJ Construction for superior craftsmanship and a caring team.

M Dede | October 14, 2023

TRJ built a garden room office / studio for me in June '21 and did a simply superb job. Access to our garden is really difficult (all comes through the house) and Costi and has team took great care bringing everything through. The team are punctual, polite and professional. Costi gives great advice and deals with issues with no fuss. Highly, highly recommend

Martin | November 16, 2021

TRJ built a Garden office for me with bathroom and kitchen. Absolutely professionals. Fast, clean, polite, a pleasure to have at the house. Since building the garden room I've re-engaged TRJ for other building and maintenance projects. Can't recommend them highly enough.

Luke | November 15, 2021

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TRJ Construction Ltd