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Bespoke Garden Gyms

Bespoke Garden Gyms in Hertfordshire & North London

A garden gym should feel like a place you genuinely want to train — private, motivating, comfortable, and built to perform all year round. Not a cold shed with a treadmill. Not a compromised spare room. And not a short-term solution that quickly becomes unused.
At Cedar Spaces Garden Rooms, we design and build bespoke garden gyms from our base in Harpenden, serving homeowners across Hertfordshire and North London. Our garden gyms are created for people who want to train consistently, in comfort, with proper space, durability, and privacy — without leaving home.
Every garden gym we build is designed from scratch, engineered for year-round use, and delivered as a complete, finished space — not a kit, not a shell, and not a compromise.
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A Smarter Way to Train at Home

Training at home often starts with good intentions. A few weights in the garage. A treadmill in the spare room. Over time, the problems appear — cold floors, poor ventilation, noise in the house, limited space, and equipment that never quite fits properly.
A dedicated garden gym changes that completely.
It gives you a separate, purpose-built environment where you can train properly, without disturbing the household or being distracted by it. You step out of the house, enter a focused space, and train on your own terms. For many clients, this separation is the key to consistency.
A garden gym is also a practical alternative to:
  • Long-term gym memberships
  • Travelling to and from training facilities
  • Converting garages that are cold and restrictive
  • Sacrificing valuable internal living space

Who Our Garden Gyms Are Designed For

We design garden gyms for homeowners who are serious about how they use their space.

Fitness-Focused Homeowners

  • Strength training, free weights, and racks
  • Cardio equipment with proper floor loading
  • Functional fitness and mobility training
  • People training several times per week, year-round

Personal Training & Private Coaching (Residential Use)

  • Homeowners working with personal trainers privately
  • Space for safe movement, mirrors, and equipment flow
  • Privacy without public gym distractions

Wellness-Led Buyers

  • Yoga, Pilates, stretching, and mobility practice
  • Calm, light-filled spaces that support recovery
  • Integration with sauna or wellness use over time

Households Wanting Balance

  • People who want to train without impacting family life
  • Early-morning or late-evening workouts without noise concerns
  • A dedicated zone that supports long-term health habits
We build residential garden gyms only. We don’t design commercial fitness facilities, and we don’t compete on lowest price — because performance, comfort, and durability matter more than cutting corners.

Designed for Year-Round Training Comfort

A garden gym must work in January as well as July.
Our garden gyms are designed to remain:
  • Warm in winter
  • Cool and ventilated in summer
  • Comfortable for long training sessions
This is achieved through proper insulation to walls, floor, and roof, controlled ventilation, and materials chosen for durability and performance. Flooring, wall finishes, and glazing are all specified with real training use in mind.
Acoustic separation is also critical. Being physically separate from the house reduces noise transfer immediately, allowing you to train freely without worrying about disturbing others.

Fully Bespoke Design — Built Around How You Train

No two people train the same way, so no two garden gyms should be identical.
Every design begins with how you’ll actually use the space:
  • Type of training and equipment
  • Ceiling height and movement clearance
  • Floor loading and impact absorption
  • Mirror placement and lighting
  • Storage and layout flow
  • Future flexibility for other uses
We also design around the garden itself — orientation, access, boundaries, and how the building will sit visually within the space. The goal is always the same: a garden gym that feels considered, permanent, and motivating to use.

Our Design & Build Process

We deliver garden gyms through a clear, end-to-end process so you’re not managing trades or decisions alone.

Consultation & Site Assessment

We discuss your training goals and assess what’s possible within your garden.

Bespoke
Design

Your garden gym is designed specifically for your training style, equipment, and long-term use.

Build &
Installation

We manage the entire build, including groundworks, structure, insulation, doors, windows, flooring, and finishes.

Finished
Handover

You receive a complete, ready-to-use garden gym — not a shell, not a project, and not something you need to finish yourself.

How Homeowners Use Their Garden Gyms

Our garden gyms are used in many different ways, including:

Strength and free-weight training spaces

Cardio and conditioning rooms

Functional fitness studios

Yoga and mobility rooms

Hybrid gym-wellness spaces designed to evolve over time

What they all share is comfort, usability, and longevity.

Built to Avoid Common Problems

Many homeowners approach us after seeing or experiencing garden gyms that fall short in real use. Our approach is designed to avoid issues such as:
  • Condensation and damp
  • Cold floors and poor insulation
  • Overheating during training
  • Insufficient ceiling height
  • Weak flooring for heavy equipment
  • Flimsy structures that feel temporary
  • Buildings that quickly become storage
A garden gym should support your health and routine — not become another unused space.

Areas We Cover

Cedar Spaces is based in Harpenden (AL5) and designs and builds garden gyms across Hertfordshire and North London, including:

Hertfordshire

  • St Albans

  • Jersey Farm

  • Fleetville

  • Marshalswick

  • Sopwell

  • Bernards Heath

  • London Colney

  • Park Street

  • Chiswell Green

  • Bricket Wood

  • Colney Heath

  • Sandridge

  • St Michael’s

  • Harpenden

  • Batford

  • Southdown

  • Kinsbourne Green

  • Wheathampstead

  • Redbourn

  • Markyate

  • Kimpton

  • Codicote

  • Ayot Green

  • Ayot St Lawrence

  • Flamstead

  • Studham

  • Hexton

  • Welwyn Garden City

  • Welwyn

  • Digswell

  • Tewin

  • Tewin Wood

  • Oaklands

  • Mardley Heath

  • Hatfield

  • Old Hatfield

  • Brookmans Park

  • Essendon

  • Little Berkhamsted

  • Hertford

  • Bengeo

  • Hertingfordbury

  • Ware

  • Stanstead Abbotts

  • Hunsdon

  • Much Hadham

  • Widford

  • Hitchin

  • Ickleford

  • Pirton

  • Holwell

  • St Ippolyts

  • Great Wymondley

  • Little Wymondley

  • Letchworth Garden City

  • Baldock

  • Graveley

  • Stevenage

  • Kings Langley

  • Knebworth

  • Hemel Hempstead

  • Boxmoor

  • Apsley

  • Leverstock Green

  • Bovingdon

  • Chipperfield

  • Abbots Langley

  • Watford

  • Croxley Green

  • Rickmansworth

  • Chorleywood

  • Sarratt

  • Bushey

  • Radlett

  • Shenley

  • Borehamwood

  • Elstree

  • Aldenham

  • Letchmore Heath

  • Potters Bar

  • Cuffley

  • Goffs Oak

  • Cheshunt

  • Berkhamsted

  • Northchurch

  • Tring

  • Wigginton

  • Aldbury

North London

  • Barnet

  • High Barnet

  • Arkley

  • Hadley Wood

  • New Barnet

  • East Barnet

  • Friern Barnet

  • Whetstone

  • Totteridge

  • Mill Hill

  • Finchley Central

  • North Finchley

  • West Finchley

  • East Finchley

  • Church End

  • Woodside Park

  • Hampstead

  • Hampstead Garden Suburb

  • Highgate

  • Dartmouth Park

  • Muswell Hill

  • Alexandra Palace

  • Enfield Town

  • Southgate

  • Winchmore Hill

  • Palmers Green

  • Cockfosters

  • Oakwood

  • Grange Park

  • Bush Hill Park

  • Enfield Chase

  • Crouch End

  • Hornsey

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Contact Cedar Spaces

If you’re looking for a garden gym that supports real training — private, comfortable, and built to last — Cedar Spaces would be happy to help.