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Garden room project · Swift Unlimited

A contoured acoustic studio crafted around its composer

A 6.5m × 4.7m studio for a composer in a Yorkshire conservation area, clad in stone, with a decoupled inner shell of angled walls and a raked ceiling.


Published 25 July 2025 · Updated 25 October 2026 · 4 minute read · Written by The Garden Room & Annexe Guide

Inside the contoured room within a room structure
Swift Unlimited  6.5m × 4.7m in Yorkshire

This 6.5m x 4.7m acoustic garden studio, created by Swift Unlimited, is quite unlike any other soundproofed building we’ve featured. While we’ve covered high-spec studios before, often with tailored acoustic upgrades, this is the first time we’ve seen a contoured, decoupled inner shell engineered specifically for both sonic clarity and spatial performance. It’s a unique approach to garden studio acoustics and reflects Swift Unlimited’s ability to start each project from a blank sheet.

At a glance

  • Size: 6.5m × 4.7m.
  • Built for: A professional composer moving out of a converted cellar, based on a studio Swift built for a collaborator in Sheffield.
  • Planning: Approved in a conservation area, with stone cladding to match the local vernacular.
  • Acoustics: A SIP outer shell, two sets of windows and doors with a cavity between, and a decoupled inner room with no parallel walls.
  • Company: Swift Unlimited, whose planning consultants dealt with the local authority.

Part of our garden music room guide →

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Design

A bespoke design from a blank sheet

Swift Unlimited don’t work from a catalogue of fixed options. Each of their buildings begins with a blank sheet and a conversation. They consider how the space will be used, how it needs to perform, and how it will sit within the garden, both visually and technically. The result is a bespoke solution designed around the client’s exact needs rather than squeezing those needs into an existing template.

3d model of the stone clad garden room designed to blend with the Yorkshire venacular
The 3D model: the stone-clad studio in its setting.

The 3d model that Swift Unlimited created to visualise the final building

In this case, the client, David, is a professional composer working at the highest level of the creative industries, collaborating with colleagues and clients globally. His previous workspace-a converted cellar-had served him well, but with a growing family and evolving career demands, it was time for a studio that could match the calibre of his output.

The blueprint

Inspired by a proven acoustic blueprint

David was already familiar with Swift Unlimited’s work. Several years earlier, the team had completed a high-performance acoustic studio for one of his close collaborators in Sheffield. That studio had set the benchmark, not only for its technical precision but also for its nuanced acoustic profile, shaped by non-parallel walls, a multi-angled ceiling, and layers of sound treatment that delivered an exceptionally accurate sound environment.

David approached Swift Unlimited to use that successful design as a springboard for his own studio-this time adapted for a different setting, a different garden, and a different set of practical constraints.

Planning

Designed for the setting

David’s property lies within a designated conservation area in the Yorkshire countryside. Gaining planning approval required careful consideration of the site’s character and the architectural style of surrounding buildings. Before work could begin on the build, Swift Unlimited’s planning consultants liaised with the local authority, presenting a proposal that respected the area’s stone-built vernacular while introducing a contemporary structure that made the most of the panoramic views.

The result is a building that blends beautifully with its surroundings, clad in a warm, sympathetic stone finish.

The contemporary building blends well into the rural setting
The finished studio  in the Yorkshire countryside
A natural stone cladding was chosen to blend with the local Yorkshire venacular
Natural stone cladding  matching the local vernacular
Acoustics

Acoustic integrity at every layer

Behind the traditional exterior is a high-performance structure built using SIPs (Structural Insulated Panels) for strength, airtightness and energy efficiency. To enhance sound isolation, Swift Unlimited installed two sets of windows and doors with a cavity between them. This creates a sealed acoustic break between the internal and external layers, helping to prevent sound transmission while still allowing natural light to fill the space-a careful balance between studio functionality and everyday comfort.

3d model showing the shape of the panels that make up the decoupled room within a room structure
The 3D model: the panels that form the decoupled inner room.
The electrical plan that shows the shape of the decoupled room within a room
The electrical plan: showing the shape of the inner room.

Every element of the studio has been engineered to support acoustic performance. Cable routes, air conditioning ducts and service penetrations have all been detailed to maintain the integrity of the acoustic envelope, with no weak points in the isolation layer.

Room shape

A unique internal form to maximise performance

While many purpose-built acoustic studios use rectangular forms with carefully specified treatments, this project takes a more advanced approach. Rather than relying solely on treatments to manage how sound behaves, Swift Unlimited have shaped the room itself to enhance acoustic performance from the outset.

The inner shell has been designed with angled, faceted walls and a subtly raked ceiling to eliminate parallel surfaces and scatter reflections more evenly. This reduces the risk of flutter echoes and standing waves, helping to create a more balanced, natural-sounding environment.

The internal structure is completely decoupled from the outer shell, with a layer of acoustic insulation in between. This gap not only prevents sound transmission but also plays a crucial role in shaping how sound behaves within the space-an essential quality for a composer working on nuanced, expressive work.

Inside the contoured room within a room structure
Inside  angled walls and a raked ceiling
Comfort

Built to sound good and feel right

The acoustic treatment of the space wasn’t just about technical performance-it was also about creating a space that feels comfortable and inspiring to spend time in. Swift Unlimited worked closely with David and his acoustic advisor to shape a room that supports focused work across long sessions, with a controlled, balanced acoustic that encourages creativity.

In use

A soundproof garden studio that works globally

Whether composing for film, working to tight deadlines or collaborating with teams overseas, David now works from a space that has been built entirely around his needs. From the contoured acoustic form to the precise technical detailing, every part of this project has been designed to help his work flow.

And in the quiet moments between compositions, the quality of the build speaks just as clearly as the music.

Pricing

Nationwide service and current pricing

Swift Unlimited work with clients across mainland UK, designing and building bespoke garden studios that respond to their intended use. While no two projects are the same, a garden studio of this size and acoustic specification would currently be priced in the region of £87,000 to £95,000, depending on the final specification and location.

Planning something similar?

Learn more about Swift Unlimited

To learn more about the specification and how Swift Unlimited can tailor a design to serve your acoustic needs, chat to the Swift Unlimited team on 01625 875 588 or by emailing support@swiftunlimited.co.uk Explore www.swiftorg.co.uk to see more examples of their work.

Visit Swift Unlimited More Swift Unlimited projects
More projects like this Garden music rooms 30sqm+ garden rooms
Read the guides What garden rooms cost Permitted development What is a garden room?

Published 25 July 2025 · Photographs courtesy of Swift Unlimited.

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