Size a small private gym from the equipment you will put in it and the clearances around each piece, not from a square-metre figure meant for a home gym. Buy commercial-grade equipment, because strangers will use it many hours a day with nobody watching. And look hard at three things a staffed club doesn’t worry about: the door, the changeover between customers, and air in a closed room. The wider start-up steps are in how to open a private gym.
How big the room needs to be
- List the stations. For a strength-focused room: a rack with barbell and plates, a bench, a dumbbell rack, a cable unit if you have one, one or two cardio machines, and open floor for mats and warm-ups.
- Take each footprint from the manufacturer’s specification, not from a photo. Rack widths differ by model, and cable units are deeper than they look.
- Add the clearances below for the bar, the treadmill and the walkways.
- Add the non-training area: the entrance with the keypad, space for a bag and coat, the cleaning kit, and a toilet or changing corner if you provide one.
The sum is your minimum. Then check that two people can train at once without waiting, because a trainer and client, a couple or two friends book the room together.
Layout and clearances
- The barbell. An Olympic bar is 2.2 m long and plates go on from the sides, so leave working room at both ends. Don’t put the rack against a side wall.
- The rack. Place it where a customer can bail out of a squat backwards and a dropped bar lands on the platform, not on a cardio machine. Anchor it if the manufacturer says so.
- The treadmill. About 2 m free behind it and 0.5 m on each side, or more if the manual asks.
- Ceiling height. Check it against your tallest likely customer with a bar locked out overhead, a pull-up on the rack, and a runner on the treadmill deck. Converted basements often fail on the pull-up.
- Walkways. A clear route from the door to every station and the exit, away from the bar path and the treadmill.
Equipment checklist
Essentials for a strength-focused room
- Power rack or half rack with safety arms and a pull-up bar
- Olympic barbell (20 kg), plus a 15 kg bar if you expect many beginners
- Plates with small increments, and bumper plates if lifts will be dropped
- Adjustable bench rated for your customers’ loads
- Dumbbells with a rack, or adjustable dumbbells if space is short
- Rubber flooring under the rack and free-weight area
- Collars and a clock visible from the rack
Next additions
- Cable or functional trainer
- One or two cardio machines; a rower or bike is easier to place than a treadmill
- Kettlebells, bands, a plyo box, mats
- A mirror on one wall, away from the free-weight area
Also on the list
- Cleaning spray, cloths and a bin, with a sign saying what to wipe
- Hand sanitiser at the door
- A first-aid kit at a marked place, and emergency numbers with the gym’s exact address on the wall
- Your phone number on the wall
Home-grade or commercial-grade
Home equipment is designed for one household; a rented gym is used by many people every day. ISO 20957, the standard for stationary training equipment, separates commercial from domestic use.
- Ask the seller for the use class and rated load in writing.
- Check that the warranty covers commercial or rental use. Home warranties usually exclude it.
- Prefer equipment you can inspect and tighten yourself: bolts, pins, cables, upholstery.
- Second-hand commercial kit from a closed club often beats new home kit, if you can inspect it.
Your insurer may ask what equipment you have and how you maintain it; see insurance and liability.
Floor, air, light and sound
- Floor. Rubber tiles or rolls in the free-weight area on a level base. A platform under the rack protects the floor and your neighbours.
- Air. One person training hard heats and humidifies a closed room fast. Plan ventilation or air conditioning sized for the room; a window is not enough.
- Light. Bright, even, on a switch by the door or a sensor. A 6:00 slot in December starts in the dark.
- Sound. Neighbours hear dropped weights through the structure, so a platform and bumper plates matter more than wall panels.
- Water. A tap or dispenser and a toilet. A shower is optional and adds cleaning; many hourly customers train and go.
The door
The entrance decides whether the gym can run without you.
- Recommended: a 2N keypad with a maglock, fitted by a professional door or access installer. It needs power and a network cable at the door, so plan the route with the installer before you finish the walls. The installer also fits an exit button so customers can always get out. Doors and frames are checked during setup. See 2N keypad + maglock.
- Several doors or a shared building entrance are solved during setup at no extra cost.
- A second door should stay locked from the inside and work as an emergency exit only.
- A sign on the door with your booking web address, so passers-by know how to book.
Cleaning and changeover kit
With a 1-minute buffer between slots, the customer does the changeover. Make it easy: spray and cloths by each station, a visible bin, a checklist on the wall (“re-rack plates, wipe the bench, lights off”), and a marked place for everything. Your own cleaning happens in blocked time; see slot length, buffer and cleaning time and the house rules template.
FAQ
How big should a small private gym be?
Big enough for your equipment plus clearances: a 2.2 m bar with loading room at both ends, about 2 m behind a treadmill and 0.5 m at its sides, and a clear walkway from the door. Draw the layout with real footprints before you sign a lease.
What equipment should a small gym have?
A rack with safety arms, an Olympic bar and plates, an adjustable bench, dumbbells and rubber flooring. Add a cable unit and cardio next. Buy commercial-grade with a warranty that allows rental use.
What door setup do I need?
We recommend a 2N keypad with a maglock, fitted by a professional installer.