• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
The Garden Room & Annexe Guide Logo
Swift UnlimitedExplore what’s possible
Exceptional Spaces, Endless PossibilitiesFit for Life – Fit for PurposeWhatever your PassionDesigned for Work and LifeBeautifully Built, Uniquely YoursDedicated Specialised RoomsLeisure and Pleasure
The Garden Room & Annexe Guide Logo
Swift UnlimitedExplore what’s possible
Exceptional Spaces, Endless PossibilitiesFit for Life – Fit for PurposeWhatever your PassionDesigned for Work and LifeBeautifully Built, Uniquely YoursDedicated Specialised RoomsLeisure and Pleasure
  • Buyers Guide
        • Introduction
          • What is a garden room?
          • How to buy a garden room
          • Buyers doubts
          • Pre-designed garden rooms
          • Modular garden rooms
        • Rules & Regulations
          • Garden Room Planning Permission Guide
          • Permitted Development Overview
          • Building Regulations
        • Build & Installation
          • Off-site construction
          • Complete on-site builds
          • Garden rooms can be craned in
          • Garden room shell builds
          • Turnkey projects
        • Design Consultations
          • Start designing your garden room
          • What to expect from a design consultation
          • Buying a garden room online
          • Comparing garden room quotes
  • Garden Rooms
        • Examples By Company
          • A to Z of Companies
        • Examples By Use
          • Small Garden Rooms
          • Garden Offices
          • Garden Gyms
          • Art & Creative Studios
          • Soundproof Garden Studios
          • Granny Annexes
          • Explore More Uses
        • Examples by Design Feature
          • With Storage Room
          • With Toilet or Shower Room
          • With Composite Cladding
          • With Canopy
          • With Covered Seating Area
          • With Pitched Roof
  • Garden Living Annexes
        • By Footprint Size
          • Less than 25sqm
          • 25sqm to 35sqm
          • 35sqm to 45sqm
          • 45sqm to 55sqm
          • 55sqm and Above
        • By Room Layout
          • Garden Bedroom
          • Open Plan
          • One Bedroom
          • Two Bedroom
          • 3 and 4 Bedroom
        • Useful Guides
          • What Is an Annexe?
          • How to Build a Granny Annexe
          • Planning and the Caravan Act
          • How Much Does a Granny Annexe Cost?
          • Renting a Granny Annexe
          • Council Tax on a Granny Annexe
          • Granny Pods
          • Annexe Show Sites
          • Ex-Display and Second-Hand Annexes
          • Granny Annexe Projects
  • Price Guides
        • Garden room prices
          • How much does a garden room cost?
          • Garden room price calculator
          • Cheap garden rooms
          • Garden rooms £10,000–£20,000
          • Do garden rooms add value?
        • Annexe prices
          • How much does a granny annexe cost?
          • Council tax on a granny annexe
          • Ex-display and second-hand annexes
          • Renting a granny annexe
        • Paying for it
          • Garden room finance options
          • Protecting your investment
          • Special offers
        • Other ways to buy
          • Second-hand and ex-display
          • Renting a garden office
  • Directory
  • About Us
        • About Us
          • Our Story
          • Work With Us
          • Newsletter
        • Contact Us
          • Our Contact Details
        • Website Policies
          • Revisit Your Cookie Settings
          • Cookie Policy
          • Privacy Policy
          • Acceptable Use Policy
          • Website Terms of Use
  • Your Guide

Fully Insulated Garden Workshop

Fully Insulated Garden Workshop

First Published: 10 July 2018
Refreshed: 10 November 2024
Reading Time: 2 minutes

For those seeking a fully insulated workshop that offers year-round comfort, Garden Fortress can tailor a design to your requirements. This project completed in Wimbledon, showcases a 5m x 4m workshop with integrated storage that epitomises functionality and quality.

Insulated garden workshop

Year-Round Comfort with SIP Construction

The client required a space that would maintain comfortable temperatures throughout the seasons. Instead of a traditional shed, they opted for Garden Fortress's SIP (Structurally Insulated Panels) construction, which forms a complete insulated envelope around the workshop, ensuring optimal thermal performance.

The deck has been fitted flush with the lawn so there is no step

Groundworks for a Seamless Transition

A key request was to have the deck at the front of the building flush with the lawn and the workshop floor. Achieving this seamless flow required precise groundwork, which the Garden Fortress team completed by hand. The area was excavated to the necessary depth before ground screw foundations were driven at regular intervals to provide a stable base.

Thanks to the low-threshold bi-fold doors, the transition from the garden to the workshop is entirely step-free. Watch the time-lapse of the build to see how this was accomplished and explore other stages of the project.

Integrated Storage

The workshop design includes built-in storage on one side, maximising functionality and saving the need for a separate structure. A distinctive canopy runs along the front, enhancing both style and usability. Although decking is optional, the client chose to add a low-maintenance composite deck.

Standard uPVC sliding doors were upgraded to bi-fold doors, creating an open, airy entrance. With a low threshold, the doors fully retract, ensuring seamless movement between the outdoor and indoor spaces.

A storage shed sits alongside the main workshop

Practical Interior Features

The interior of the workshop is lined with OSB boards on the walls, floor, and ceiling, providing a durable, practical finish ideal for a working environment. The client opted for visible, surface-mounted electrics with galvanised conduit, adding both functionality and an industrial aesthetic. LED panel lights are spaced across the ceiling for bright, clear illumination, and recessed LED downlights in the canopy provide ambient lighting for the decked area.

The inside of the workshop has been lined with OSB

Mixed Cladding for Cost Efficiency

Western Red Cedar cladding was used for the front wall of the workshop, arranged horizontally for a contemporary look. To balance cost and quality, Thermowood cladding was applied to the sides and rear. This choice maintains a premium appearance where it’s most visible while using a durable, more economical option elsewhere.

Learn More

To explore creating your own insulated garden workshop, contact Garden Fortress at 07931 364 389 or email info@gardenfortress.com. For more inspiration, visit their website at www.gardenfortress.com.

Garden Fortress operates from Epsom Downs and serves Surrey, London, and the surrounding counties, including Kent, East Sussex, West Sussex, Hampshire, and Berkshire.

Visit the Garden Spaces website
Visit the Timeless Garden Rooms website
Visit the Garden2Office website
Uniquely designed garden
rooms & annexes
Bespoke, tailored to
you & your garden
No planning permission
required in most cases
Garden offices to
self-contained annexes
Based in Brighton & Hove,
building across England
See our work →
Visit the Modern Garden Offices website

Primary Sidebar

Visit the Garden Annexes website to explore their homes in the garden
Visit the Garden Spaces website
Warwick Buildings Warwick Buildings Garden Rooms
Garden Rooms
From £7,750 including VAT, delivery and installation
Insulated for year-round use 21 buildings on show near Southam Flat, pitched & curved roof designs 10-year guarantee Online design & price configurator Made in Warwickshire since 1988 100mm walls, five layers thick
See garden room options
Visit the Bridge Garden Rooms website
ARK
Bespoke Garden Rooms
& Annexesacross the South East
Garden rooms, annexes & studios Self-contained annexes Bespoke — designed around you Planning & building regs handled Designed for Permitted Development Ideal guest accommodation Offices, studios, gyms & more Insulated for year-round use Fully project-managed build Handcrafted quality throughout
Explore our work →
Excellent ★★★★★Trustpilot
Visit the Modern Garden Rooms website
Uniquely designed garden
rooms & annexes
Bespoke, tailored to
you & your garden
No planning permission
required in most cases
Garden offices to
self-contained annexes
Based in Brighton & Hove,
building across England
See our work →
Cosy Garden Rooms
FAST INSTALLATIONS FULLY INSULATED 10 YEAR GUARANTEE
Bespoke Garden Rooms
Get Your FREE Quote
SIPS Garden RoomsBespoke garden rooms & annexes
Design
Approvals
Build
Handover
From first sketch to
handing over the keys.
Bespoke SIP garden rooms and annexes, no two the same.
One-off commissions too — a ballet studio, an art studio, a garage for the cars.
Approvals, build and handover managed by one team.
A fixed written price before any work starts.
Made offsite, so the work in your garden is quick and clean.
Book a free consultation
Crusoe Garden Rooms
Garden Rooms
Cedar garden rooms,
built by hand on site
From £18,750 inc. VAT · base extra Hand-built on site, not prefabricated More than 350 garden rooms built Western Red Cedar as standard Electrical connection included Free site visit, in person or by video Building across the UK from Nottingham
See the Crusoe range

Bespoke garden annexes

More than a garden room: a complete annexe.

Design, planning, foundations, agreed connections and installation, in one fixed-price quote.

1-bedroom from£85,000
2-bedroom from£130,000
See our granny annexes

The Green Room · 01536 358387

Useful Links

Planning Permission Guides

A to Z of Companies

Garden Rooms

Garden Living Annexes

Garden Room & Annexe Directory

Contact Us

Contact Us

Work with Us

Website Policies

© 2026 The Garden Room & Annexe Guide. All Rights Reserved.
The Garden Room & Annexe Guide is powered by the team at Square Meter Media Limited