What Sirius Partners does

Sirius Partners is a London-headquartered sustainable property development firm that builds and redevelops residential real estate throughout England and Scotland. The company focuses on environmentally conscious construction, integrating technologies such as air source and ground source heat pumps, photovoltaic solar panels, rainwater harvesting systems, natural insulation, fibre-optic infrastructure, living roofs, and smart power management to target EPC A-rated, energy-efficient homes. Its stated differentiators include over 65 years of combined team experience and a track record of redevelopments across England and Scotland.

The firm serves two primary customer segments: institutional investors and private investors seeking sustainable property exposure. Sirius markets bespoke property investment opportunities through direct, relationship-driven sales, with a confidential Ansarada dataroom provided for qualified investors. Revenue is generated from sustainable property development (development margin on sale or ongoing ownership) and from managing diversified property portfolios for investors. The company also surfaces UK government incentive schemes — Green Mortgages, the Renewable Heat Incentive (RHI), the Smart Export Guarantee (SEG), and Energy Company Obligations (ECO) — as complementary products that enhance returns and reduce operating costs for homeowners.

Operationally, Sirius runs with a very lean team of 9 employees, relying on 'mutually aligned partners' for construction and delivery. Its go-to-market is content-led, with an active News and Insights blog positioning the firm as a thought leader on UK housing supply, ESG strategy, deurbanization, and tightening building decarbonization regulation. Pricing is project-specific and not publicly disclosed, and the company is privately held with no disclosed outside investors or funding rounds.

Name

Sirius Partners

Legal name

Sirius Partners

Website

https://sirius-partners.co.uk

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Sirius Partners is a London-based sustainable property developer that builds and redevelops energy-efficient residential real estate across England and Scotland for institutional and private investors, integrating heat pumps, solar, and other green building technologies.

Ownership category

akta.pro rank

Product category

Sustainable Real Estate Development

NAICS

New Housing For-Sale Builders (236117), Land Subdivision (2372), Residential Remodelers (236118)

SIC

Land Subdividers & Developers (No Cemeteries) (6552), Investors, Nec (6799)

akta.pro primary industry

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

akta.pro secondary industries

Residential Land Development & Subdivision Homebuilding (Build-to-Sell Communities) (IMAFABAL), Residential Design-Build & Renovation-Integrated Builders (IMAFABAE)

Keywords

• Sustainable property development
• Real estate investment management
• Green building construction
• Environmental redevelopment services
• Residential real estate development

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Property Development: Sirius Partners generates revenue through developing sustainable residential real estate. The company invests in high-quality, sustainable real estate assets, providing growth, security and confidence to clients. Revenue is derived from the development and sale or ongoing ownership of sustainable property portfolios.
2. Real Estate Investment Management: The company manages diversified property portfolios for institutional and private investors, delivering long-term sustainable value. Revenue is generated through investment management fees and carried interest on returns.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Sirius Partners develops and manages sustainable residential real estate for institutional and private investors across England and Scotland. The company's core offerings consist of new-build residential developments starting from land with planning permission and environmental redevelopments of existing residential and mixed-use properties, both delivered with integrated green building technologies targeting EPC rating A. The firm also supports its developments with a financial product (Green Mortgages) and informational coverage of UK government incentive schemes (RHI, SEG, ECO) that benefit homeowners of its sustainable homes.

Product overview

Sirius Partners is a sustainable real estate development company offering a suite of products and programs. Their core offerings include new residential developments and environmental redevelopments of properties throughout England and Scotland. They supplement their real estate development with financial and incentive products: Green Mortgages (rewarding energy-efficient home ownership), Renewable Heat Incentives (RHI), Smart Export Guarantees (SEG), and Energy Company Obligations (ECO). The company focuses on building sustainable homes using technologies including Air Source Heat Pumps, Photovoltaic Panels, Ground Source Heat Pumps, and other green building materials and systems.

Differentiator

Problem solved

Functional benefit

Products and services

• New Residential Developments

Quantifiable outcome

• Green buildings achieve a 7% increase in asset value compared to non-green buildings
• +5 more outcomes

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Persimmon plc: Large UK volume housebuilder with national geographic reach and ongoing investment in energy-efficient housing standards. Comparable as a UK residential developer operating under the same net-zero regulatory backdrop.
• Berkeley Group: UK-listed residential developer with strong sustainability positioning across its London and South East portfolio. Directly comparable on sustainable new-build residential development targeting premium and mainstream UK buyers.
• Bellway: Top-five UK housebuilder with a national land pipeline and ongoing investment in greener housing specifications. Comparable on product, customer (UK home-buyers), and regulatory exposure.
• Barratt Developments: One of the UK's largest residential developers with a stated commitment to net-zero-ready homes and ESG-led design. Highly comparable as a UK housebuilder competing in the same sustainable housing regulatory environment as Sirius.
• Crest Nicholson: UK residential developer focused on building sustainable homes and communities across southern England. Comparable as a direct UK new-build competitor with an explicit sustainability proposition.
• Taylor Wimpey: Major UK housebuilder with publicly stated sustainability targets and a national land pipeline. Comparable in product (new-build UK homes) and in exposure to UK regulatory drivers of energy efficiency.
• Keepmoat Homes: UK homebuilder focused on regeneration and energy-efficient developments, particularly in the North of England. Closely comparable to Sirius on the redevelopment/revitalisation angle of the business.

Broad incumbents

• Legal & General Capital: Large institutional investor and developer active in UK residential and sustainable real estate. Comparable as a counterparty and competitor for institutional capital deploying into UK sustainable housing.
• CBRE UK: Global real estate services and investment firm with a UK residential and ESG advisory practice. Comparable as a broad incumbent that competes for institutional sustainable-property mandates alongside niche developers like Sirius.

Emerging players

• Ilke Homes: UK modular homes manufacturer focused on energy-efficient, factory-built sustainable housing. Closely comparable to Sirius on the sustainability-first, technology-driven approach to UK residential delivery.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/sirius-partners-uk

Revenue estimate

Valuation estimate

Number of profiles

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 Sirius Partners