TRJ CONSTRUCTION · PROJECT PORTFOLIO
Garden Gym in Bishop’s Stortford
A private SIP garden gym in Bishop’s Stortford, designed as a dedicated place to train at home.

THE PROJECT
From an idea
to a real space.
A private SIP garden gym in Bishop’s Stortford, designed as a dedicated place to train at home.
Bespoke SIP Garden Room by TRJ Construction
A fully bespoke garden gym in Bishop’s Stortford, designed, engineered and built using high-performance SIP construction. This project showcases what a modern garden room can truly become—a premium, all-year-round fitness space, combining structural performance, smart technology, and high-end finishes.
This bespoke garden gym in Bishop’s Stortford was designed and built using high-performance SIP panels, delivering a fully insulated, all-year-round fitness space. Featuring aluminium bifold doors, full mirror walls, smart LED lighting, and integrated air conditioning, this project demonstrates how a garden room can be transformed into a premium lifestyle extension.
Built using 150mm SIP panels for the roof and floor and 125mm for the walls, this structure offers significantly higher thermal performance and airtightness compared to standard timber garden rooms.
Engineered for thermal efficiency & structural strength
Built under 2.5m height (planning-friendly)
Cedral cladding (front) to match the main house
Modern dark render system for a sharp architectural look
Aluminium bi-fold doors for full-width opening
Full mirrored back wall for depth and training functionality
Acoustic side walls with integrated LED lighting system
High-quality flooring suitable for gym use
Smart LED strip lighting (app-controlled)
Full electrical installation (consumer unit, sockets, lighting)
LG mirrorless air conditioning system (heating & cooling)
Ceiling-integrated Sonos speakers + amplifier
Unlike standard garden rooms, this gym is built using high-spec SIP panels, creating a space that maintains:
No cold spots or condensation issues
This allows the building to function as a true extension of the home, not just a seasonal space.
Why Choose TRJ Construction for Your Garden Gym?
SIP construction specialists (not standard timber builds)
Fully bespoke design tailored to your space
Complete service: design, build, electrics, finishes
High-end materials and premium detailing
Serving Bishop’s Stortford, Hertfordshire & North London
Ideal Uses for This Type of Garden Room
“Costi and the team have just completed a garden gym, fully furnished with internal/external spotlights, heating/aircon, ceiling speakers, hanging TV, LED lights etc. The whole process from original quote, construction, to finish was really smooth and without any issues. Costi is onsite each day and offers flexibility and ideas for enhancements. I would highly recommend.” -by Martin Huxley
Ready to build your own garden gym?
✔ Free design consultation✔ Fast, detailed quote✔ Planning advice included
📞 Call: 07966 800519📧 Email: costi@trj-construction.co.uk🌐 www.trj-construction.co.uk
REAL PROJECT PHOTOGRAPHS
A closer look
at the build.
Explore photographs from this project using the rotating gallery. Use the arrows or pause the movement to study each view.
View the full photograph collection ↓
Photograph 1 of 4 · Project photograph 1
THE PHOTOGRAPH COLLECTION
Details worth
a closer look.
Photographs recorded for this project. They may show different stages and views; the gallery is not a promise of a standard package.








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YOUR NEXT PROJECT
Start with
your own brief.
Tell us how you want to use the space, where it will be built and which details you like from this project. We can discuss a layout and specification suited to your property.
Access, ground conditions, services, planning and building control requirements need to be assessed for your site. Dimensions, prices and timescales are agreed for the individual project.

