TRJ CONSTRUCTION · BESPOKE SIP GARDEN BUILDINGS

Garden gyms.
Your space
to move.

Train at home, on your terms.

Create a private fitness space a few steps from the house. TRJ Construction designs and builds insulated SIP garden gyms for homes across Hertfordshire, North London, Essex and Buckinghamshire, with the layout and specification planned around your routine.

Discuss your garden gym ↗Explore the gym gallery ↓

Weights. Cardio. Yoga. A room designed around the way you train.

Garden gym interior with cardio machines and glazed garden views
GARDEN FITNESSYour garden. A new routine.

BUILD YOUR OWN GARDEN GYM

A little less travel.
A little more time
for yourself.

Make training easier to fit into everyday life.

A dedicated garden gym gives your equipment a permanent home without taking over the spare room. Work out before the day starts, stretch between appointments or enjoy a private evening session without a journey to the gym.

Whether your brief is a weights room, cardio space, yoga studio or a flexible combination, we plan the building around the activities that matter to you. Explore our bespoke garden rooms and tell us how you would use yours.

GARDEN GYMS · COMPLETED PROJECTS

Explore our garden gym projects

See the photographs, specification and customer feedback behind each job.

Bespoke Garden Gym in Dartford, Kent
Design, drawings and whole-job management by Costi Tiseanu · Dartford, Kent

GARDEN GYM · CASE STUDY

Bespoke Garden Gym in Dartford, Kent

Explore the Clegg garden gym in Dartford, Kent, with kitchenette, shower room and trussed roof. Design, drawings and full project management by Costi.

Explore this project ↗
Bespoke Garden Gym in Ealing
Building work by TRJ Construction Ltd for Garden Spaces · Ealing, London

GARDEN GYM · CASE STUDY

Bespoke Garden Gym in Ealing

A home gym shaped to fit the garden, with room to exercise outdoors. Building work by TRJ Construction Ltd for Garden Spaces in Ealing, London.

Explore this project ↗
Garden Gym in Haringey, London
Building work by Costi and his team for Garden Spaces · Haringey, London

GARDEN GYM · CASE STUDY

Garden Gym in Haringey, London

Explore a Haringey garden gym with sliding glazing, mirrors, rubber flooring and decking. Building work by Costi and his team for Garden Spaces.

Explore this project ↗

WHY CHOOSE A GARDEN GYM?

Your routine.
Your own room.

The benefits of a home fitness room come from how well the space works for you. Start with your equipment, preferred activities and the time you want to spend there.

01

Privacy and convenience

Train in a dedicated space at home, with your own layout, storage and everyday routine. Spend less time travelling and more time using the room.

02

A layout that fits your training

Combine weights, cardio, stretching or yoga around the available footprint. Plan clear movement space and sensible positions for equipment.

03

Comfort across the seasons

An insulated building, appropriate heating and ventilation can create a useful room throughout the year. Agree the comfort specification before construction.

04

A flexible addition to your home

A thoughtfully planned garden room can adapt as your interests change. Design the space around practical use rather than a single piece of equipment.

05

Finishes that suit your garden

Choose the balance of cladding, glazing, privacy and daylight. Durable materials and careful detailing support everyday use and straightforward maintenance.

06

A clear project budget

A home gym can reduce your reliance on external memberships. Compare the whole project cost, including fit-out, equipment and running costs, with your priorities.

EXPERTLY DESIGNED & BUILT TO LAST

The room around
the workout.

Good gym design starts before the first machine arrives. We coordinate the structure, floor, services and finishes around the equipment and activities in your brief.

01

Base and floor loads

Provide the weights and locations of racks and machines. The foundation, base and floor structure must suit the intended loads; impact from dropped weights needs separate consideration.

02

Insulated SIP construction

We build with Structural Insulated Panels to form the insulated shell. The floor, walls, roof, joints and glazing are coordinated as part of the agreed building specification.

03

Fresh air, heating and cooling

Exercise changes the room’s ventilation needs. Discuss fresh air, condensation control and heating early, alongside any air-conditioning requirement.

04

Lighting and electrical provision

Plan lighting, socket positions and electrical capacity around cardio equipment, music, screens and everyday use. Services and routes should be agreed before the build.

05

Noise and vibration

Weight training, treadmills and loud music can affect nearby rooms and neighbours. Tell us about the intended activities so suitable acoustic and vibration measures can be considered.

06

Security, storage and finishes

Coordinate doors, glazing, equipment storage and a suitable floor finish. A yoga room and a heavy-weights gym may need different surfaces and layouts.

Understand SIP construction ↗Explore heating & cooling ↗What can be included ↗

A PRIVATE WORKOUT SPACE

Make room
for your way
of training.

Start with the equipment footprint, the clearance each machine needs and the space to move safely. Ceiling height, door openings and access into the garden should be considered alongside the floor plan.

For yoga and Pilates, open floor space and a calm outlook may be the priority. For cardio and resistance training, power, ventilation, equipment loads and suitable flooring need more attention. We develop the room around your brief.

Share your equipment list ↗
Glazed garden gym beneath a mature tree
Bring your equipment list and ideas to the design conversation.

AFFORDABLE GARDEN GYMS · A TAILORED QUOTATION

Build around
your priorities.

A clear specification helps you compare like for like. We discuss the features that matter most and set out the agreed construction and fit-out scope in your quotation.

01 / SHARE THE BRIEF

Tell us how you train

Send your postcode, garden photographs, approximate size and equipment list. Include access restrictions and any services you need.

02 / SHAPE THE DESIGN

Agree the details

Develop the floor plan, floor requirements, glazing, cladding and comfort specification. Check the planning route for the property.

03 / CONFIRM THE SCOPE

Review your quotation

Check the foundation, building, finishes and service connections included. Confirm any equipment, accessories or specialist works separately.

04 / BRING IT TO LIFE

Build and fit out

Coordinate the approved project, access and installation sequence. Position the equipment around the finished, agreed layout.

Request a garden gym quotation ↗See how we build ↓

START WITH THE RIGHT PLANNING ROUTE

Designed for
your garden.

A private home gym may qualify as an incidental outbuilding under permitted development in England when every relevant condition is met. Property restrictions, dimensions, height, location and intended use all matter.

Check the position before committing to the building. If you intend to run a business, invite clients or add sleeping accommodation, discuss that use from the beginning. Our planning permission guide explains the key considerations.

Planning and building regulations are separate checks. We can discuss the appropriate approach with your proposed layout and specification.

HertfordshireNorth LondonEssexBuckinghamshire

GARDEN GYM QUESTIONS

Plan with
confidence.

Practical answers about year-round use, equipment, garden gym costs and the design requirements to discuss before construction.

Can I use a garden gym all year round?

A well-specified insulated garden room can support year-round training. The floor, walls, roof, glazing, heating and ventilation need to work together. We agree the comfort requirements and discuss suitable heating and cooling options for your layout.

Can the floor support weights and fitness equipment?

Tell us the type, weight and position of your equipment before design is finalised. Heavy racks, machines and concentrated loads need specific consideration. Dropping weights also introduces impact and vibration, so the base, floor structure and surface must suit the intended use.

Do garden gyms need planning permission?

A private garden gym may fall within Class E permitted development for a house in England when all relevant conditions are met. The building dimensions, boundary distances, property status and intended use matter. Commercial use or visits by clients can change the assessment.

Will my garden gym be soundproof?

Insulation alone does not make a room soundproof. Music, treadmills and impact from weights can travel through the structure and openings. Discuss noise and vibration early so any acoustic measures can be included in the agreed specification.

Can the room be used for yoga, Pilates or other activities?

Yes. We can develop a flexible layout for stretching, mat work, cardio or mixed activities. Share your routine and equipment so we can consider floor space, circulation, mirrors, storage, lighting and comfort.

How much does a bespoke garden gym cost?

The price depends on the dimensions, site access, foundations, structure, glazing, finishes and services, plus any equipment-related floor or acoustic requirements. Request a tailored quotation and check the items included; gym equipment should be discussed separately.

What do you need to prepare a garden gym quotation?

Send your postcode, approximate size, garden photographs and access details, together with an equipment list and how you intend to train. Let us know about heating, cooling, electrical connections, water or shower-room requirements.

YOUR NEXT ROUTINE STARTS AT HOME

Let’s create
your garden gym.

Send your postcode, approximate room size, garden photographs and equipment list. We will discuss a bespoke SIP garden gym built around your training and your home.

Start your garden gym project ↗07966 800519Email Costi

TRJ Construction Ltd · Building the Future Together.

Dark-clad garden room beside a lawn and boundary fence
A dedicated space, planned around you.

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