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Bespoke Garden RoomsAward-Winning Designs15 Year WarrantyOver 18 years’ experience5 Star ReviewsFully Bespoke or Straight to SiteFriendly, Flexible and Capable Service
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Garden room project · Cosy Garden Rooms

Versatile garden room for music, relaxation & family time

A 4m × 3m garden room for a retired couple in Derbyshire, with a piano, two glazed corners and Heathered Moss HardiePlank® against the planting.


Published 25 May 2025 · Updated 24 October 2026 · 3 minute read · Written by The Garden Room & Annexe Guide

The garden room sits well in the established garden
Cosy Garden Rooms  4m by 3m in Derbyshire

When this retired couple relocated to a new home in Derbyshire, they wanted to create a peaceful, practical garden room that could serve multiple purposes. Their vision? A warm, welcoming space for playing the piano, relaxing with views of the garden, and even hosting the occasional sleepover for their grandchildren. Cosy Garden Rooms brought that vision to life with a beautifully designed, insulated 4m x 3m garden room that balances simplicity with thoughtful detail.

At a glance

  • Size: 4m × 3m.
  • Built for: Playing the piano, relaxing and the odd grandchildren's sleepover.
  • Budget: £18,000, on a patio base the couple had prepared.
  • Finishes: Heathered Moss HardiePlank® on three sides, grey at the back, Anthracite Grey uPVC; dark chestnut laminate inside.
  • Company: Cosy Garden Rooms.

Part of our garden music room guide →

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The service

A complete service from start to finish

Cosy Garden Rooms offer a full turnkey service, handling everything from the concrete foundation to the final electrical connection. In this case, the couple had the concrete patio base prepared ahead of time, and Cosy Garden Rooms worked to a budget of £18,000 to deliver a ready-to-use space that complements the couple’s downsized lifestyle.

Outside

Low maintenance outside and in

A key part of the brief was to keep maintenance low. Cosy Garden Rooms use durable Hardie® Plank composite cladding-known for its colour-fast, weather-resistant qualities-for a long-lasting exterior that doesn’t need regular painting or staining. In this project, the couple chose Heathered Moss cladding for three elevations, paired with a Grey finish at the rear. The soft green tones work beautifully with the established shrubs and Mediterranean-style planting in the garden, while the Anthracite Grey uPVC doors, windows, and trims add a smart contrast and echo contemporary finishes.

You can explore more Cosy Garden Rooms projects here to see the different looks they’ve created using the same robust cladding system in a wide range of colour options.

Cosy Garden Rooms are low maintenance with Hardie Plank cladding and uPVC doors and windows
Heathered Moss  HardiePlank®
Glazing

Designed around the garden and natural light

Glazing plays a big role in the building’s character. Cosy Garden Rooms worked with the couple to design a combination of corner patio sliding doors and a full-height picture window to the left, creating a glazed corner effect that frames the view into the garden. On the opposite side, a second glazed corner has been created using two opening windows positioned at desk height, making this part of the room ideal for reading, relaxing, or enjoying the garden from a different perspective.

The doors and windows are Anthracite Grey on the outside and white inside
Corner glazing  framing the garden
Two top opening windows have been positioned together to create a glazed corner
A second glazed corner  two opening windows
Inside

Bright, calm and contemporary inside

Internally, the space is bright and welcoming. White grooved wall panelling creates subtle texture, while the smooth ceiling-free from joining strips-adds to the room’s clean, uncluttered look. A dark chestnut laminate floor grounds the space with warmth and richness, and integrated lighting-including six dimmable spotlights, two canopy lights and a directional eyeball fitting-offers plenty of flexibility for day or night use.

It’s the ideal blank canvas, allowing the couple to personalise the space with their own furniture, piano, and family touches.

The white grooved panel walls create a neutral back drop for the clients colourful furnishings
Inside  white grooved panelling
In the garden

A room that slotted into the garden

The garden room has slotted naturally into the gently sloping plot, surrounded by established planting. Its unobtrusive presence is a reflection of how minimally invasive Cosy Garden Rooms’ installation process is-preserving the integrity of the surrounding garden and ensuring the new space feels like it has always been there.

The garden room sits well in the established garden setting
Among the planting
Planning something similar?

Learn more about Cosy Garden Rooms

To learn more about creating a low-maintenance garden room, speak with the Cosy Garden Rooms team on 0115 77 22 715 or email info@cosygardenrooms.co.uk. You can also explore more examples of their work and learn about their process at www.cosygardenrooms.co.uk.

Visit Cosy Garden Rooms More Cosy Garden Rooms projects
More projects like this Garden music rooms Composite cladding 10–20sqm garden rooms
Read the guides What garden rooms cost Permitted development What is a garden room?

Published 25 May 2025 · Photographs courtesy of Cosy Garden Rooms.

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