Sustainable Design Collective

What Sustainable Design Collective does

Sustainable Design Collective Ltd is a UK private limited company founded in 2002 and headquartered in Eastbourne, with a regional office in Bristol and an offsite manufacturing partnership in County Tipperary, Ireland. The firm operates as a collective of architects, environmental consultants and construction professionals specialising in low-carbon, Passivhaus-standard timber frame construction. Its core offering centres on a proprietary twin-wall timber frame kit home system manufactured offsite in Ireland, delivered alongside a Passive Slab foundation, MVHR ventilation, cellulose insulation and certified triple glazing, achieving wall U-values of 0.12 W/m2K and airtightness below 0.6 ACH@50Pa.

The business generates revenue through three streams: design and build services for turnkey housing, one-off sales of pre-fabricated kit homes, and sustainability consultancy (PHPP modelling, SAP/EPC assessments, Code for Sustainable Homes ratings). Pricing is positioned at the affordable end of the Passivhaus market — Code 4 builds from £1,100–£1,200/m2 and Code 5 turnkey at £1,440/m2 — explicitly targeting rural social housing associations as well as mid-market self-build clients. Customer evidence is anchored by South Devon Rural Housing Association's Parkfield Thurlestone development (Code 5, 88 of 107 points) and a portfolio of individual residential projects across the South West of England and Ireland.

The company operates with 1–10 employees under three directors (Bill Brown, Donal Brown, Dr Di Parkin), is founder-controlled with no external venture or private equity investment disclosed, and reaches customers via direct field sales, content marketing, open day events and organic social media rather than through third-party channels.

Name

Sustainable Design Collective

Legal name

Sustainable Design Collective Ltd

Website

https://sustainabledesigncollective.co.uk

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

1–10 employees

Short description

Sustainable Design Collective is a UK-based architecture and construction firm delivering Passivhaus-standard timber frame kit homes, design-and-build services and sustainability consultancy to housing associations and self-build clients across the UK and Ireland.

Ownership category

akta.pro rank

Product category

Sustainable Architecture and Construction Services

NAICS

Prefabricated Wood Building Manufacturing (321992), Residential Building Construction (23611), Architectural Services (54131)

SIC

Prefabricated Wood Bldgs & Components (2452), General Bldg Contractors - Residential Bldgs (1520)

akta.pro industry

PRIMARYIMAFABAH

Residential Green / High-Performance Home Construction (Net-Zero, Passive House)

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Residential Building Construction

SECONDARYIMAFABAF

Residential Modular & Prefabricated Home Construction

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Residential Building Construction

SECONDARYIMAFABAE

Residential Design-Build & Renovation-Integrated Builders

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Residential Building Construction

Keywords

• Sustainable architecture services
• Timber frame construction
• Passivhaus design
• Kit home manufacturing
• Green building consultancy

Headquarters

HQ city

Brighton

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Design and Build Services: Complete architectural design, planning permission, and construction management services for timber frame kit homes and sustainable buildings. Provides total continuity from design through to completion.
2. Kit Home Manufacturing and Sales: Pre-fabricated timber frame kit homes manufactured offsite in County Tipperary, Ireland. Flat pack delivery for self-build or commercial projects. Includes Passive Slab foundation systems.
3. Sustainability Consultancy: Energy and Sustainability Statements for planning, SAP/EPC assessments, Passivhaus PHPP modelling, Code for Sustainable Homes assessments, and renewable energy feasibility studies.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

Sustainable Design Collective is a collective of architects, environmental and construction professionals that designs and delivers low-carbon timber frame buildings to Passivhaus standards. It provides prefabricated timber frame kit homes, sustainable architectural design, sustainability consultancy, and complete design-and-build services for self-build, social housing, and commercial projects across the UK and Ireland. Manufacturing of the proprietary twin-wall timber frame system is carried out offsite in County Tipperary, Ireland.

Product overview

Sustainable Design Collective offers a portfolio of interconnected services centered on sustainable timber frame construction. The core offerings include Timber Frame Kit Homes and the Passivhaus Kit Build System, which utilize a proprietary twin-wall timber frame manufactured in Ireland with passive slab foundations. These are supported by Sustainable Architects Services, Sustainability Consultants (providing PHPP modelling, SAP assessments, Code for Sustainable Homes ratings), and Social Housing solutions. The company also provides Self Build Support for clients wishing to self-finish their projects, Design and Build services for turnkey delivery, and Retro-fit & Green Deal assistance for existing buildings. The product portfolio is showcased through flagship projects like the Parkfield Thurlestone development, demonstrating Code 5 compliance at £1,440/m2.

Differentiator

Problem solved

Functional benefit

Products and services

• Timber Frame Kit Homes Pre-fabricated timber frame kit home system using a twin-wall design manufactured in County Tipperary, Ireland. Provides rapid, low-cost, highly energy-efficient construction achieving Passivhaus standards with u-values of 0.12 W/m2K for walls, 0.10 W/m2K for roofs, and a passive slab foundation system. Delivered as flat-pack cassettes for self-build or commercial projects.
• Passivhaus Kit Build System Complete Passivhaus design and build solution featuring twin-wall timber frame construction, passive slab foundation, triple-glazed certified windows, MVHR ventilation, and airtightness guarantee below 0.6 ACH@50Pa. Reduces heating bills by up to 90% compared to conventional construction.
• Sustainable Architects Services RIBA-registered architects providing environmentally conscious architectural design, planning application guidance, and build management services for housing, commercial, and social-sector clients.
• Sustainability Consultancy Environmental consultancy services including renewable energy feasibility studies, Passivhaus PHPP modelling, SAP/EPC assessments, Code for Sustainable Homes assessment, and Energy and Sustainability Statements for planning.
• Social Housing Design and Build Design and build solutions for social housing with particular focus on rural areas. Provides turnkey housing association developments achieving Code 5 of the Code for Sustainable Homes at affordable costs.
• Self Build Support Flexible support for individual or communal self-build schemes including comprehensive planning advice, design services, and provision of a watertight/airtight timber frame shell for client finishing.
• Design and Build Service Complete architectural and construction service providing continuity from design through to completion. Offers either turnkey solutions or basic airtight shell for self-finishing.
• Retro-fit and Green Deal Service Energy efficiency improvement services for existing buildings including insulation upgrades, glazing, solar panels, and assistance with the UK Government Green Deal financing scheme.

Quantifiable outcome

• Heating bills reduced to 10% of UK housing stock
• +5 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• MBC Timber FramingcoreOEM/ Whitelabel/ Licensing PartnerManufacturing partner providing factory pre-assembled timber frame wall cassettes, engineered roof trusses, and passive slab foundation systems from their facility in County Tipperary, Ireland. SDC develops architects' plans into released kit homes with full structural engineering calculations.
• South Devon Rural Housing AssociationcoreStrategic or Co-development PartnerHousing association client for the Parkfield Thurlestone 4-house social housing development achieving Code 5 of Code for Sustainable Homes. CEO Steve Prime provided endorsement of the development as a template for rural affordable sustainable housing.

Scale indicators8 records

Recent moves1 record

Expansion highlights5 records

Direct peers

• Potton Homes: UK-based self-build timber frame kit home specialist offering design, manufacture and erection services. Most directly comparable to SDC's kit home business, operating in the same niche of energy-efficient timber frame self-build with a national footprint.
• Huf Haus: German post-and-beam prefab home manufacturer with established UK presence, delivering factory-built energy-efficient homes. Comparable prefab timber technology, sustainability positioning and high-end self-build customer base.
• Frame Technologies: UK offsite timber frame manufacturer and supplier of closed panel and open panel systems for residential developers and self-builders. Directly comparable on product (prefabricated timber frame) and customer segment (UK residential).
• Baufritz (UK): German manufacturer of prefabricated Passivhaus-grade timber homes with UK sales and delivery. Direct competitor in the energy-efficient prefab self-build segment with a comparable sustainability narrative and turnkey delivery model.
• WeberHaus: German prefab Passivhaus-grade timber home manufacturer with UK delivery, offering factory-produced ultra-low-energy homes. Closely comparable technology stack (prefabricated timber, Passivhaus standards) and target customer (self-build/turnkey residential).
• Cygnum Timber Frame: Ireland-based timber frame manufacturer serving UK and Irish markets with offsite-produced timber frame systems for housing developers and self-builders. Comparable in technology (closed panel timber frame), geography (Ireland/UK) and target customer overlap.
• Oakwrights: UK specialist in timber frame and oak-framed homes, providing design, manufacture and build services for self-build and bespoke residential projects. Similar high-performance, design-led positioning to SDC's self-build arm.

Emerging players

• Wernick Group: UK modular and offsite construction specialist serving residential, education and public sectors, including affordable housing. Less specialised in Passivhaus but operating in the same MMC / offsite space targeting UK housing associations.

Broad incumbents

• Barratt Homes: One of the UK's largest volume housebuilders, increasingly adopting offsite timber frame and energy-efficient construction methods under Future Homes Standard pressure. Broad incumbent competing in the same residential space at vastly greater scale.
• Kingspan Timber Solutions: Part of Kingspan Group, one of the largest offsite timber frame and panel manufacturers in the UK and Ireland, serving volume housebuilders and developers. Significantly larger than SDC, but directly comparable in core technology (offsite timber frame panels) and serves an overlapping customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xtwitter.com/BrownSdc
• Facebookfacebook.com/SustainableDesignCollective
• LinkedInlinkedin.com/company/sustainable-design-collective-sdc

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sustainable Design Collective