Garden Rooms > G-Range > G4
About the G4
from £24,955 building only
see customer reviews >
- Angled forward leaning frame
- 3 board deck step
- 73 size options
What’s included v See Specification v
Graphite Pack
Black Pack
Natural Pack
The G4 garden room is one of the most striking and design-led buildings in the G-Range, created for those looking to make a bold architectural statement in their garden.
Its standout feature is the forward-leaning front face, which introduces a sharp, angular form that gives the building a dynamic and sculptural appearance. This angled design creates a sense of movement and adds a distinctive edge that sets it apart from more traditional styles.
Styled in either natural or composite flashings, the G4 has a is a modern garden room design that creates a bold statement in your garden. The unique front profile not only creates visual impact but also creates a practical sheltered front hood.
With all G-Range buildings, the differences between each design are external, with the internal style and options remaining consistent across the range. This means your choice comes down to the exterior style that best suits your space.
If you’re looking for a bold, architectural garden room with a sharp and modern shape, the G4 is a standout choice.
G4 Garden Room Pricing Table
Prices include: VAT, professional installation, base and foundations, delivery* and a fully insulated specification designed for comfortable year round use.
External/Internal Sizes
Choose your size from two width options:
| D W |
|---|
| 3.1m |
| 3.6m |
| 4.1m |
| 4.6m |
| 5.1m |
| 5.6m |
More
More
| 2.7m | 3.2m | 3.7m | 4.2m | 4.7m | 5.2m | 5.7m |
|---|---|---|---|---|---|---|
| £24,955 | £26,355 | £27,080 | £27,870 | £29,935 | £30,775 | £31,620 |
| £26,355 | £27,080 | £28,705 | £29,265 | £30,440 | £31,620 | £33,035 |
| £27,080 | £28,705 | £29,600 | £30,775 | £32,455 | £33,735 | £34,920 |
| £27,870 | £29,265 | £30,440 | £32,455 | £34,300 | £35,820 | £37,275 |
| £29,935 | £30,775 | £32,455 | £34,300 | £36,380 | £37,890 | £39,120 |
| £30,775 | £31,620 | £34,020 | £35,820 | £37,890 | £39,400 | £42,085 |
| 6.2m | 6.7m | 7.2m | 7.7m | 8.2m | 8.7m | 9.2m | 9.7m | 10.2m |
|---|---|---|---|---|---|---|---|---|
| £32,285 | £33,735 | £34,470 | £35,535 | £36,095 | £37,605 | £38,200 | £39,400 | £40,635 |
| £34,300 | £35,365 | £36,715 | £37,605 | £38,505 | £40,575 | £41,295 | £42,530 | £44,380 |
| £36,715 | £37,890 | £38,730 | £41,190 | £42,985 | £44,440 | |||
| £38,445 | £40,850 | £42,035 | £44,440 | |||||
| £41,750 | £43,545 | |||||||
| £44,545 |
G-Range Transparent Pricing Policy:
- All listed prices are fully inclusive, with all essentials included. What’s included >
- Quoted sizes are EXTERNAL measurements for simple and transparent sizing.
- Premium materials come as standard.
Design Your Garden Room
Choose your style pack from Graphite, Black or Natural, with all variations being included in the listed price.
What’s included as standard
in every G-Range Building:
- Full measurements and site survey
- Full building installation
- 12-year guarantee
- 2.3m high-security uPVC French or sliding door
- Lozenge opening window
- Premium double-glazing throughout
- External lighting
- Corner window
- Base/foundations
- Insurance-grade locks throughout
- High-performance insulation for year-round use
- Roof surface in maintenance-free coated steel
- Redwood cladding
- Interior walls in soft-sheen white melamine
- Wall mounted radiator
- Internal LED Lighting
- Three internal double sockets
- Oak laminate flooring
The Garden Room Show 2026
This isn’t any show… It’s a Garden Room Experience
✔ Compare all 5 Green Retreats ranges side by side
✔ Experience layouts, materials and craftsmanship in person
✔ Relaxed 1:1 design guidance from our experienced team
✔ Explore samples, finishes and interactive design tools
✔ Enjoy a premium showroom experience with refreshments and family friendly spaces
*TERMS AND CONDITIONS APPLY
- Showroom offers are available on selected Green Retreats ranges for orders placed during The Garden Room Show event.
- Offers cannot be used in conjunction with any other promotion, discount or finance incentive.
- Selected offers are only available on qualifying installations scheduled within specific installation weeks and before the end of July 2026, subject to availability.
- Not available on B1 Kit buildings.
- Not valid on orders placed through Costco.
- If your project requires planning permission, promotional eligibility will depend on approval being received in time for an eligible installation date.
- Installation dates are subject to availability and may change depending on project requirements and installation schedules.
- Green Retreats reserves the right to amend, extend or withdraw any promotional offer at any time without notice.
- Please speak with our team for full offer details and eligibility criteria.
Roofing
Our roofs are exceptionally strong and, you’ll be delighted to learn, maintenance free.Locks & Catches
Each door and window is lockable using high-security industry-standard and insurance compliant fittings.Door & Window Framing
All doors and windows of our garden rooms are constructed from reinforced steel and uPVC.Flooring
The sub-floors of our garden rooms are engineered to sit clear of the ground to allow air to circulate and remove any risk of rising damp.Guttering
4” wide guttering is provided as standard on all garden room buildings, helping to manage the flow of water from the roof and away from your garden room.Wiring & Electrics
Internal electrics are fitted by our own part-p certified electricians. Included as standard are 3 x 13amp double sockets, consumer unit and lighting.Internal walls
All our garden rooms are fitted with a durable and easy-clean melamine interior. The finish is a lightly reflective soft sheen surface, which is strong enough to hold fixings such as shelving and pictures. The melamine is UV stable – meaning it is will not discolour or bleach in direct sunlight.Exterior walls
18mm thick Maintenance free, FSC sustainable certified Scandinavian redwood is used as the standard cladding choice for our garden rooms with alternative options available as upgrades.Insulation
We use an in-house engineered wall insulation system that is eco-friendly and A+ rated for fire safety.Options Included as Standard
2.3m French or sliding door
2.3m French or sliding door
Our garden rooms come with a 2.3m French or sliding door set as standard; additional door sets are available as optional add-ons. The doors and windows are available in black or graphite.
Opening lozenge window
Opening lozenge window
Included in the price of your garden room is the choice of horizontal or vertical lozenge windows, offering airflow and extra daylight. Both windows are available in black or graphite.
Corner window
Corner window
A standard feature in our garden rooms is a corner window, providing abundant natural light and panoramic views, enhancing the spaciousness and ambience of the space.
Premium-grade insulation
Premium-grade insulation
Our premium-grade insulation is used throughout the garden room’s walls, roof and flooring, offering excellent thermal efficiency using industry-leading materials.
Melamine wall finish
Melamine wall finish
The white melamine wall is easy to clean and soft to the touch, resulting in a beautiful finish to the garden room interior.
Redwood cladding
Redwood cladding
Our Scandinavian redwood cladding is sustainably sourced and certified by the FSC. This maintenance-free wood has grown slowly over 80 years, enhancing its natural strength. It’s tanalised throughout the entire grain to shield it from weathering and wear.
A choice of flooring options
A choice of flooring options
You can pick and choose from our various luxury flooring options, such as White Oak Laminate, Grey Oak Laminate, Natural Oak Laminate, and Grey Carpet Tile.
Premium Locks
Premium Locks
ABS three-star rated locks, endorsed by “Secured by Design” and tested by the Master Locksmith Association, achieve the Sold Secure Diamond grade, the UK’s top security standard. In case of an attack, a concealed lock with a robust Molybdenum can swiftly engage, creating an impregnable barrier against intruders.
Three double sockets
Three double sockets
Our garden rooms come equipped with three double sockets as standard, ensuring ample access to power for your various needs without the hassle of additional installations.
Internal lighting
Internal lighting
Whether you’re working on a cloudy day or having a relaxing evening in the garden room, our internal lighting systems give you ample lighting whenever you need it. You can choose from two side-mounted up/down lights, LED panel lights or Track light with three LED lights.
External lighting
External lighting
Included for added style, safety, and security is one option for external lighting. Additionally, a PIR sensor is available at no extra cost for your chosen light style.
– 1 up/down-light
– 1 torch-light (PIR sensor available)
Heating
Heating
Your garden room has a standard wall-mounted radiator so that you can keep warm all year round! Alternatively, you can upgrade to one of our premium heating options, including underfloor heating and air conditioning.
Click each feature for more information and specifications
Add more of...
Additional Windows & Styles
Additional Windows & Styles
Opening Square Window: 905mm x 905mm
Full Height Window: 500mm x 2070mm or 1000mm x 2070mm
Picture Window: 905mm x 1650mm
Opening Lozenge Windows: 905mm x 440mm
Vertical lozenge windows: 405mm x 905mm
Additional Doors & Styles
Additional Doors & Styles
French Doors: 1.45m, 2.3m, 2.8m or 3.8m
Sliding Doors: 2.3m, 2.8m or 3.8m
Bi-Fold Doors: 2.8m or 3.8m or 4.8m (ext height buildings only)
Single Door: 805mm
Additional Electrical Sockets & Styles
Additional Electrical Sockets & Styles
- USB Sockets
- Outside Sockets
- Isolator Switch
- Fused spur
- Extractor Fan
Additional Internal Lights & Styles
Additional Internal Lights & Styles
- 2 side-mounted up/down-lights
- 1 LED panel light 600mm x 600mm
- IP rated light
- Track light containing 4 LED lights – black or white
- Black circular ceiling light
Additional External Lights & Styles
Additional External Lights & Styles
- 1 up/down-light
- 1 torch-light
- Deck & Hood Lights
Click each feature for more information and specifications
Luxury Upgrade Options
Plastering – Plaster Pack
Plastering – Plaster Pack
The plasterboards on the pack are affixed to the steel roof and melamine walls, which are skimmed, and then the white skirting boards are added to finish.
Partition Walls
Partition Walls
Our partitional walls are available in melamine as standard or plastered if you opt for the plaster pack. Internal doors are also available for the partition walls in either white, pine or oak veneer.
Extended Height Options
Extended Height Options
Increase the external height of your garden room to 2.7 meters for added headroom and spaciousness. Typically, extended-height garden rooms can be constructed without planning permission.
Underfloor Heating
Underfloor Heating
Carbon film underfloor heating systems are readily available for garden buildings, offering an efficient and comfortable heating solution.
Air Conditioning
Air Conditioning
Have ultimate thermal control with an air conditioning unit. The LG unit offers a standard, sleek design, functioning as an external air source heat pump system.
Solar panel upgrade
Solar panel upgrade
Our industry-leading solar panels currently generate the most solar per square inch on the market. This discreet eco-friendly garden room upgrade has the potential to not only power your garden room, but also kick-back into your home!
Oak Veneer Skirting Boards
Oak Veneer Skirting Boards
For an alternative finish to your garden room interior, you can opt for a beautiful oak veneer skirting board.
Internal Painting
Internal Painting
Our decorator will complete the plastering and apply your selected paint from Dulux, Laura Ashley, or Farrow & Ball collections. Alternatively, entrust us to finish your garden room with pristine white paint.
Acoustic Pack
Acoustic Pack
Our acoustic pack is designed to reduce noise pollution by 45 decibels. This package includes both the Plaster Pack and laminated glass for comprehensive soundproofing.
Professional Electrical Connection
Professional Electrical Connection
For a power connection to your garden room, you can rely on our in-house electrical company, Homepower, a part of The Green Retreats Group, which consists of fully qualified and Part-P certified electricians ready to serve you.
Ethernet Connection Or Homeplug
Ethernet Connection Or Homeplug
We provide two options for connecting your garden room to the internet: 1. Homeplug: This straightforward and budget-friendly adapter connects your home router’s broadband internet signal to your garden room. 2. Cat6 Armoured Ethernet Cable: Offering faster and more reliable connectivity, a Cat6 armoured cable establishes a direct connection from the router in your home to the devices in your garden room.
Recessed Spot Lights
Recessed Spot Lights
Recessed spotlights in a garden room offer a subtle yet effective way to illuminate the space while maintaining a clean and uncluttered aesthetic. Available in both melamine and plastered buildings.
Halo Ceiling Lights
Halo Ceiling Lights
Halo ceiling lights in a garden room create a soft and inviting ambience, perfect for relaxation or productivity.
Fitted Blinds
Fitted Blinds
We provide a variety of fitted blind options, offering an array of colours and styles to choose from.
Sedum Green Roof
Sedum Green Roof
Our sedum roof option blends in with a natural landscape and offers local environmental sustainability by absorbing rainwater and promoting better air quality.
Honey Redwood, Cedar or Composite Cladding
Honey Redwood, Cedar or Composite Cladding
Redwood Cladding: Sourced from majestic redwood trees, this timber boasts rich, deep red tones, creating a stunning visual impact for your garden room. Renowned for its durability and resistance to decay, redwood cladding provides timeless elegance and long-lasting performance.
Composite Oak: Composite Oak cladding ensures lasting beauty for years to come with its low maintenance requirements while offering warm, earthy tones.
Composite Cedar: Engineered for durability and longevity, Composite Cedar cladding requires minimal upkeep while retaining its natural charm and beauty.
Composite Black: Make a bold statement with Composite Black cladding for your garden room. Crafted from recycled materials, this option combines eco-consciousness with contemporary style.
Composite Grey: The soft, neutral tones of grey blend seamlessly with any outdoor environment, providing a versatile backdrop for your landscaping and décor.
Slatted Cladding: Create a modern and stylish look for your garden room with slatted cladding. The vertical wooden slats are available in Redwood and Honey Redwood, which offer textural depth for your garden room exterior.
Exterior Slatted Screen
Exterior Slatted Screen
Slatted Screen offers a versatile solution for adjusting shade and privacy, enhancing both functionality and aesthetics.
Deck & Hood Lights
Deck & Hood Lights
Illuminate the exterior of your garden room with a deck or hood lights, offering a striking decorative option. Rows of small LED spots can be seamlessly inset into your deck boards, roof hood, or both.
Outside Socket
Outside Socket
Harness the power from your garden room for additional practical functions in the garden by installing an outdoor socket.
Click each feature for more information and specifications
Payment Schedule & Finance Options
£300 Holding Deposit
Due: At any early stage of your planning
Your £300 holding deposit secures your installation date and locks in your quoted price for 1 year from the date the order is placed. It’s fully changeable and refundable up until 6 weeks before your installation date – giving you complete peace of mind while you finalise your plans.
60% Building Deposit
Due: 6 weeks before installation
We require confirmation of your building 6 weeks prior to installation. At this point, a 60% deposit is due, which secures your order and sends your building into production. This step ensures everything is ready and on track for your scheduled installation date. No further changes can be made after this payment has been taken.
30% of Remaining Balance
Due: On final day of initial construction
It typically takes 2–5 days to install your garden room. On the final day of this initial construction phase, we require 30% of the remaining balance. This payment confirms completion of the main building structure and allows us to proceed with the finishing touches such as electrics.
Final 10% of Remaining Balance
Due: On full building completion
After the main structure is installed, final works such as electrics, plastering, and any optional extras like air conditioning will be completed. Once these finishing touches are done, the remaining 10% balance is due. At this point, your 12-year guarantee is also activated, giving you complete peace of mind.
Finance Option
Green Retreats now offer flexible finance options on all garden room products. Whether you’re looking for a garden gym, office or studio space, our finance options allow you to explore the options of spreading the cost of your garden room over between 3 and 10 years in monthly instalments.
How To Order Your Garden Room
Pop Into Our Showroom
Are you starting your garden room journey? We recommend coming and seeing our buildings in person to place an order. This way, you can browse and explore our entire range with the help of our friendly team, who can answer all your questions and take payment in the showroom.
We’ll Come to You!
Already know what you want? If you’re happy with your online research without visiting our showrooms, you can book an at-home design consultation.
At this appointment, we will review all the important design elements and measurements for your project. The design consultation is completely free with no obligation and place your order with our site surveyors.
Call Us to Save the Date!
If you know exactly when you’d like your garden building installed, or if you’re in a hurry and want our next available installation slot, then you can reserve your installation date first and sort out the details after!
All we ask for is a deposit to secure the fully refundable date until 6 weeks before, so there’s no pressure if you change your mind or would like to delay.
G4 Building Specifications
Walls
The G4 wall section is crafted in-house using pioneering eco-friendly materials.
The interior of the wall panel consists of a 9mm thick white soft-sheen melamine board for a simple and stylish interior finish. This board sandwiches a 75mm thick eco-polymer foam insulation.
The exterior cladding is a treated recycled composite made from sawdust from the milling industry, primed for resistance against rot and decay which needs to be painted using an external paint of your choice within 6 months.
Walls
The G4 wall section is crafted in-house using pioneering eco-friendly materials.
The interior of the wall panel consists of a 9mm thick white soft-sheen melamine board for a simple and stylish interior finish. This board sandwiches a 75mm thick eco-polymer foam insulation.
There is then a layer of composite board which a uPVC vinyl cladding is attached, which is completely maintenance free and colour stable.
of composite board which a uPVC vinyl cladding is attached, which is completely maintenance free and colour stable.
Guttering
Guttering
The 4″ wide guttering further ensures the longevity of your garden pod by effectively managing excessive water flow, preserving the pod’s structure so you can enjoy it no matter the weather.
Flooring
Flooring
The flooring is designed to prevent any potential dampness from rising by promoting air circulation.
Additionally, the garden building subflooring sits above the ground level to further ensure this. The 80mm polyurethane insulation is supported by a 1mm powder-coated steel on both the top and bottom to keep the flooring protected against all-weather types.
Roofing
Roofing
The garden building roofing is made with a thick 80mm insulated steel panel that is reinforced with a 1mm powder-coated steel.
For further structural integrity, the roof has an added 0.5mm galvanised steel sheet to reinforce the panel. The roof’s design is slightly sloped, enabling effective water runoff to the rear guttering system and down-pipe.
Glazing
Glazing
The glazing is made with Pilkington K Optiwhite’ extra clear’ double-glazed windows and doors that are hard coated, low-e, argon-filled, and fitted with a Planitherm layer and Swisspacer. This advanced technology ensures exceptional insulation and energy efficiency.
Click each feature for more information and specifications
G4 Gallery
Create extra space at home with our fully insulated and year-round garden rooms.
Visit Us
Experience our quality garden room ranges and options first hand at our showrooms in London and in Buckinghamshire, open 7 days a week. Our Showrooms
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The best place to compare?
Visit our Showrooms
See the differences between the ranges for yourself, and experience the quality in person.
Our Showrooms
The best place to compare?
Visit our Showrooms
See the differences between the ranges for yourself, and experience the quality in person.
What our customers say
We are so pleased to be top rated on Trustpilot
by our customers.
by Louisa (Louisa Tudor)
Fantastic Room in a little London garden!
We now have an amazing room at the bottom of our garden that fits in beautifully and feels as though it has been there for ever. All the staff were incredibly helpful and friendly and the entire process was very straightforward.
by Peter
Can’t beat a Green Retreat!
We cannot recommend Green Retreats highly enough, compare their offer to anyone else and I think they will win the day. The finished result is a garden room of class and something to be proud of. Value is what you get as an overall package and experience, not what just the price tag states. Choose low maintenance materials and you cannot do better than Green Retreats, they simply are very hard to beat!
by Mark
I’d recommend them to anyone
Each element of the team that came were all extremely polite, punctual and very professional. The quality of the materials are extremely high and the overall quality of the garden room is amazing. It’s fabulous to be able to sit in a room outside to work and to relax and enjoy the garden to its full potential. Green Retreats have been superb throughout the process, and we would not hesitate to recommend them to anyone!
by Sarah Levin
What a great company!
The customer care and communication, from the start of my enquiry through to the installation has been exemplary! I’m so pleased with my G2, it not only looks great but it is a
first class product down to the last detail. I can’t recommend Green Retreats highly enough and I’m super excited to relocate my art studio into the garden! Thank you Green Retreats.
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