A ROOM OF YOUR OWN
Garden rooms
Insulated garden rooms for a studio, family space or everyday retreat. Choose the layout, glazing and finishes around the way you want to use your garden.
TRJ CONSTRUCTION · DESIGNED AROUND YOU
SIP construction
& building services.
More space for the life
you want to live.
Garden rooms. Independent living. A better place to work. We design and build spaces around your home, your ambitions and your everyday life across Hertfordshire, North London and the surrounding counties.
Your idea. Our craft. A new possibility.
ONE TEAM. MANY POSSIBILITIES.
A little more space.
A lot more life.
From a quiet garden office to a home for someone you love.
TRJ brings together bespoke design, Structural Insulated Panel construction and the details that make a building work. Explore our services below, then visit the dedicated pages for ideas, specifications and examples.
A room is more than its footprint. It is how the light enters, how the layout flows and how comfortably it fits into everyday life.
FIND YOUR NEXT CHAPTER
What would you
make room for?
Choose a category or browse the whole collection.
Every service starts with your brief.
15 services to explore
CLOSER TO FAMILY
Granny annexes
Self-contained garden accommodation planned around independent living, with space for a kitchen, bathroom and comfortable everyday routines.
SPACE TO FOCUS
Garden offices & music rooms
A dedicated workspace or creative studio away from the house. Electrical provision, comfort and any acoustic requirements are considered in your brief.
MOVE ON YOUR TERMS
Garden gyms
Train at home in a room designed around your equipment and routines. Discuss floor requirements, ventilation, lighting and the space you need to move.
MORE HOME, MORE POSSIBILITY
SIP house extensions
Create more living space connected to your home. We discuss the layout, structural requirements, services and finishes as part of the extension design.
MAKE SPACE FOR YOURSELF
Man caves & garden retreats
A private space for gaming, a hobby, a workshop or simply switching off. Plan a flexible room around storage, seating and the activities you enjoy.
ROOM TO LEARN
School buildings
SIP buildings for classrooms and other education spaces. Develop the specification around the setting, intended use, access and project requirements.
BUILT FOR YOUR BUSINESS
Commercial buildings
Practical spaces for business, from workspaces to customer-facing buildings. We discuss how the building needs to function before planning the construction.
A SPACE THAT STANDS OUT
Exhibition structures
Bespoke structures and display spaces for exhibitions. Share your brief, venue requirements and installation arrangements with the TRJ team.
THE EVERYDAY DETAILS
Kitchen design & installation
Kitchens planned around storage, preparation and everyday use. Explore layouts and finishes for an annexe or a home improvement project.
COMFORT, CONSIDERED
Bathroom design & installation
Bathrooms and shower rooms designed for the available space. Discuss fixtures, finishes, circulation and accessibility requirements early in the project.
ROOM FOR YOUR INTERESTS
Playrooms & creative spaces
A separate room for instruments, hobbies or family activities. Adapt the layout, storage and specification to the people who will use it.
COMFORT THROUGH THE SEASONS
Air conditioning
Heating and cooling options for garden buildings and other spaces. A survey helps identify the appropriate system and installation requirements.
START WITH A CLEAR PLAN
Planning support
Discuss your proposed building and the planning route for your property. Requirements depend on the location, dimensions and intended use.
CONNECTED TO YOUR NEEDS
Electrical installation
Plan lighting, sockets and electrical provision around the space. Tell us about appliances, equipment and connections when developing the specification.
PRESS PLAY. PICTURE THE POSSIBILITIES.
An idea.
A new perspective.
See an annexe design come to life.
Your video brings a different view to the journey: a visualisation of a garden annexe and its finishes. Use it as inspiration, then explore photographs of completed TRJ projects to see our work in practice.
Explore completed projects ↗FROM YOUR FIRST IDEA TO THE FINISHING TOUCH
A clear path
to your new space.
We shape the project around your site,
your priorities and the agreed specification.
Share your idea
Tell us your location, the space available and what you want the building to do. Site photographs and access details are useful starting points.
Shape the design
Discuss layouts, materials, comfort and the planning requirements for your proposal. We establish what is included in the project.
Build the structure
Coordinate the base, SIP structure, openings and services around the agreed design and the conditions on site.
Make it yours
Complete the finishes and details that support everyday use, from lighting and flooring to kitchens or bathrooms where specified.
YOUR STYLE. YOUR STARTING POINT.
Different shapes.
The same care.
Explore garden-room design ideas.
These images are design visualisations.
Design concepts illustrate possible finishes and layouts. Your project specification is agreed individually.
LOCAL KNOWLEDGE. BESPOKE THINKING.
North London
& the Home Counties.
We discuss projects across Hertfordshire, North London, Essex and Buckinghamshire. Explore local information for Watford, Essex and Hertfordshire, or send your postcode with your enquiry.
THE PRACTICAL QUESTIONS
Start with
a little clarity.
Your site and specification shape the answer. Here are a few useful starting points.
Which areas does TRJ Construction cover?
We work across Hertfordshire, North London, Essex and Buckinghamshire, including Watford and Barnet. Share your project postcode so we can confirm the arrangements for your location.
What should I send for a project quotation?
Send your location, approximate dimensions, intended use and preferred finishes. Photographs of the site and access route help us discuss the scope, specification and next steps.
Can you help with a complete garden-building project?
We discuss the design, construction and finishing requirements together, including the base, glazing, electrical provision, kitchens or bathrooms where required. Your quotation sets out the agreed scope and inclusions.
How long will my project take?
The programme depends on the building size, specification, access, ground conditions and any approvals required. We discuss the anticipated schedule for your project before the work starts.
YOUR NEXT CHAPTER STARTS WITH A CONVERSATION
What do you
have in mind?
A place to focus. Space for family. A new way to enjoy your home. Send us your location, approximate size and ideas, and we will discuss the next steps.
Download our brochure ↓
