Our £4,500 starting price covers a fully insulated single garage gym: a survey and fixed quote, a damp check and membrane where needed, insulated and boarded walls and ceiling, an insulated wall behind the existing door, plaster and paint, heavy-duty rubber flooring, LED lighting, certified sockets, ventilation and a proper handover. Additions such as a new door, mirrors or extra circuits are priced into the same fixed quote.
What our starting price is based on
Our starting price is for a typical single garage with a sound structure, the existing door kept in place and a standard gym fit-out. It is a real specification, not a stripped-back teaser. Here is what it includes, step by step, in the order we do the work.
Survey and fixed quote
We start with a free survey at your home. We measure the garage, check the slab, walls, roof and door, look at the power supply and talk through how you train and what kit you have or plan to buy. We check the planning history for your address. Then we send a written fixed quote for the whole job. That price is what you pay unless you choose to change the specification.
Damp check and membrane where needed
Before anything else, we find and fix any damp. We look for rain getting in, moisture rising from the ground and condensation. Where the slab needs it, we lay a damp-proof membrane before the floor goes down. Finishes only go on once the room is dry. Our damp and ventilation guide explains how we find the cause.
Insulated and boarded walls and ceiling
We line the walls with an insulated frame, a vapour control layer and plasterboard. We insulate the ceiling, either at joist level under a pitched roof or under the deck of a flat roof, and board it. This is what keeps the room warm in winter, cooler in summer and free from the condensation that rusts kit.
Insulating behind the existing door
We build an insulated stud wall just inside the garage door, boarded and finished on the gym side. The outside of the house looks exactly the same, and the door can stay in place for the future. It is the simplest and most cost-effective way to deal with the coldest part of the garage.
Plaster and paint
Walls and ceiling are skimmed and painted, giving a smooth, clean finish that looks like a room in the house rather than a garage. We use a hard-wearing paint suited to a space that sees sweat, chalk and the occasional knock from a plate.
Heavy-duty rubber flooring
We fit heavy-duty rubber gym flooring across the room. It protects the slab, absorbs impact and noise, grips underfoot and is easy to clean. Where the slab is uneven, we level it first so the floor sits flat and the joints stay tight. Our flooring guide covers the options in detail.
LED lighting
We fit bright, even LED lighting suited to training, placed so it does not sit in the bar path or glare in your eyes on the bench. The switch goes by the door. Our electrics guide explains the lighting choices.
Sockets, installed and certified
We fit sockets where your kit will sit, planned from the equipment layout so there are no trailing leads across the floor. A registered electrician installs the work, notifies it under Part P and issues a certificate.
Ventilation
An insulated room needs a way to clear the moisture from training. We fit ventilation sized to the room, so fresh air comes in and damp air goes out, keeping the room comfortable and your kit dry.
Handover
When the work is finished, we walk you through the room, show you how the ventilation runs and hand over the electrical certificate and any building control paperwork. The room is clean and ready for your kit.
How long it takes
A typical starting-price conversion takes a few weeks from start to handover. Damp repairs, a double garage or any of the additions below add time, and we include a timescale for your project in the quote, so you know when to order your kit.
Common additions and how they change the job
Each addition is priced into the fixed quote so you can see exactly what it adds and drop anything you do not need.
- Double garage: more floor, wall and ceiling to insulate and finish, so more materials and more days on site.
- Insulated replacement door: removes the old door and fits a new sectional or roller door, which also frees ceiling space.
- Bricked-up opening: adds foundations, a new wall, usually a window or door, building regulations approval and extra time.
- Mirror walls: full-height mirrors fixed flat and secure, planned around the rack.
- Wall panelling: hard-wearing panels that protect the walls and give a finished, commercial look.
- Extra electrics: dedicated circuits for treadmills, TV and speaker points and more sockets.
- Insulated floor or lifting platform: raises the floor and adds a dedicated area for heavy drops.
- Structural work: anything involving steel, widening an opening or roof repairs, with a structural engineer where needed.
What you need to do
Your part is simple, but it helps the job run smoothly. Clear the garage before we start, or let us know if you need more time. Choose your finishes, such as paint colour, panelling and mirror layout, before work begins. Decide on your main kit, especially the rack and any cardio machines, so we can place sockets, lights and mirrors around it. If you are not sure what to buy, we can talk through what fits your room at the survey.
See our cost guide for what pushes the price up, and our pricing page for a summary.
Key points
- Our £4,500 starting price is for a typical single garage with the existing door kept.
- It includes the survey, damp fixes, insulated walls and ceiling, an insulated wall behind the door, plaster and paint, rubber flooring, LED lighting, certified sockets, ventilation and handover.
- Additions such as a new door, mirrors, panelling and extra electrics are priced into the same fixed quote.
- You clear the garage, choose finishes and decide on your main kit.
- The council building control fee, where it applies, is paid directly to the council.
More detail: what a garage gym conversion involves, our pricing and the areas we cover.