What Domna does

Domna is a UK-based tech-enabled home retrofit services company that combines a proprietary AI-powered assessment platform (Ara) with a full-service delivery operation covering retrofit assessment, coordination, design, evaluation, and physical installation of insulation, heat pumps, solar panels, and ancillary measures to PAS 2035 standards. Founded in 2023 (originally as Hestia) by ex-McKinsey Partner Anna Moore, ex-British Land/essensys leader Chenai Gondo, and former Exii CTO Khalim Conn-Kowlessar, the company targets three enterprise segments: social housing providers navigating MEES compliance and government grant programmes, private landlords seeking EPC upgrades, and institutional real estate investors managing large asset portfolios. The group was reorganised in January 2025 with a majority investment of up to £70 million from Leon Capital LLP and the acquisition of Osmosis ACD, bringing 70+ PAS2035-qualified professionals under the Domna brand.

The company's core technology is Ara, a remote retrofit assessment platform that ingests 4 billion+ property data points combined with synthetic smart meter data to deliver portfolio-level scope, cost, EPC, SAP, and energy-savings predictions at claimed 97% accuracy using postcode-level inputs alone. Ara supports scenario modelling for whole-house retrofit planning and is fed building-geometry data from laser scanning and thermal imaging. The delivery layer spans the full PAS 2035 lifecycle — retrofit assessment, coordination, design, and evaluation — with a nationwide network of TrustMark-, MCS-, and Federation of Master Builders-certified installers handling physical works. Domna also facilitates client access to £1 billion+ of annual government grant funding including ECO4, the Great British Insulation Scheme, the Warm Homes Social Housing Fund Wave 3, and the Warm Homes Local Grant. The product portfolio additionally includes air-tightness testing, stock conditioning surveys, damp and mould diagnostics, and digital building passports.

Domna's revenue model is primarily professional services (per-assessment, per-design, per-coordination unit pricing with multi-year enterprise contracts), augmented by managed services via grant funding facilitation. Indicative per-property works packages price around £13.1k including multiple measures, with bulk portfolio assessments sold on a pay-as-you-go basis for initial screening. Go-to-market is enterprise field sales targeting the named institutional landlord base — 50+ clients including Stonewater, Metropolitan Thames Valley, L&Q, Home Group, Platform Housing Group, Wates, NCHA, Ealing Council, Stoke on Trent Council, Warwick Investment Group, and the University of Cambridge — combined with channel partnerships through NRLA for private-landlord reach. Operations are UK-only with headquarters at Mainframe, 25 Eversholt Street, London, and supporting offices in London SE1 and W1.

Name

Domna

Legal name

Hestia Hearth and Home Company

Website

https://domna.homes

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

Domna is a UK tech-enabled home retrofit services company combining its proprietary AI-powered assessment platform Ara with on-the-ground PAS2035-compliant delivery, serving social housing providers, private landlords, and institutional real estate investors targeting MEES compliance and net-zero goals.

Ownership category

akta.pro rank

Product category

Property Retrofit Services

NAICS

Administration of Housing Programs (925110), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)

SIC

Services-Prepackaged Software (7372), Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Manufactured Housing / Mobile Home Park Management (BPAJAFAG)

Keywords

• Retrofit assessment software
• Energy efficiency services
• Property retrofit delivery
• Housing decarbonisation services
• PAS2035 retrofit compliance

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Retrofit Assessment Services: Remote and on-site property assessments using proprietary software to determine retrofit requirements, costs, and expected outcomes for property portfolios.
2. PAS2035 Retrofit Coordination and Design: End-to-end retrofit coordination including survey, design, coordination, and quality assurance following PAS2035 standards for government-funded and private retrofit projects.
3. Installation Services: Delivery of insulation, heat pumps, solar panels, and other energy efficiency measures through accredited installer network.
4. Grant Funding Facilitation: Access to government funding schemes including ECO4, Warm Homes Social Housing Fund, and Great British Insulation Scheme, with £1bn+ in grant funding available annually.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Domna is a tech-enabled UK retrofit company that combines its proprietary AI-powered platform "Ara" (using 4 billion+ data points to deliver 97%-accurate remote property assessments) with on-the-ground delivery of insulation, heat pumps, solar, surveys, and PAS2035-compliant retrofit coordination for social housing providers, private landlords, institutional investors and local authorities. The offering spans remote portfolio-level screening, in-person surveys, design, coordination, installation through a nationwide accredited installer network, and access to government funding schemes including ECO4, GBIS and the Warm Homes programmes.

Product overview

Domna is a tech-enabled retrofit services company combining proprietary AI-powered software (Ara) with a full suite of on-the-ground delivery services. Ara delivers remote, 97%-accurate portfolio assessments using 4 billion+ data points, while Domna's 65+ team of PAS 2035-qualified professionals provides retrofit assessment, coordination, design, evaluation, and delivery (including insulation, heat pumps, solar, damp surveys, laser scanning, and thermography). The company also supports access to government funding schemes including ECO4, the Great British Insulation Scheme, Warm Homes Social Housing Wave 3, and Warm Homes Local Grant. The group was formed in January 2025 by rebranding Hestia and acquiring Osmosis ACD, creating a one-stop-shop for social housing providers, private landlords, and institutional investors targeting MEES compliance and net-zero retrofit.

Differentiator

Problem solved

Functional benefit

Products and services

• Ara Retrofit Assessment Platform AI-powered asset and retrofit analysis platform using 4 billion+ data points to deliver 97%-accurate remote assessments of housing portfolios, with postcode-level screening, scenario modelling, costed retrofit pathways, EPC predictions and portfolio prioritisation for landlords and providers planning MEES compliance at scale.
• Retrofit Assessment

Quantifiable outcome

• 97% assessment accuracy using proprietary AI models
• +6 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature4 records

Partnerships

Six partnerships are on record, tiered core and supporting.

• Osmosis ACDcoreStrategic or Co-development Partner · 20 January 2025Acquired as part of Leon Capital investment. Independent retrofit consultancy specializing in PAS 2035-compliant assessment, coordination, and design for housing associations and local authorities. Leadership team includes Matthew Ratcliff, Saskia Ratcliff, and Kevin Nicholson bringing deep technical experience in retrofit.
• TrustMark Certified InstallerscoreChannel Partner/ Reseller/ DistributorNetwork of accredited installers certified by TrustMark for delivery of retrofit measures including insulation, heat pumps, and solar panels. Domna matches client projects with trusted installers from this network.
• MCS Certified InstallerscoreChannel Partner/ Reseller/ DistributorNetwork of installers certified by MCS (Microgeneration Certification Scheme) for heat pump and renewable installations. Part of Domna's nationwide accredited installer network.
• Federation of Master BuilderssupportingChannel Partner/ Reseller/ DistributorBuilding industry trade association whose certified builders are part of Domna's installer network for retrofit delivery.
• SolthermsupportingTechnology or IntegrationTechnical partner for External Wall Insulation (EWI) projects. Soltherm's Technical Director Mark Gibbs joined Domna's webinar to discuss retrofit design lessons learned from EWI projects.
• Contractor/Installer PartnerscoreChannel Partner/ Reseller/ DistributorNetwork of builders, plumbers, and installers across the UK who share Domna's vision for greener, more efficient homes. Partners receive clear project briefs, timelines, specifications, and coordination support from Domna.

Scale indicators14 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Elmhurst Energy: UK's largest energy assessment accreditation body and software provider for EPCs and retrofit (RdSAP/SAP). Closest direct peer to Domna's assessment and software arm, with deep PAS 2035/TrustMark involvement.
• Stroma: UK energy assessment, retrofit coordination, and software business, with a strong social housing and commercial portfolio. Direct competitor in PAS 2035 retrofit design and assessment services.
• Pellings: Built environment consultancy offering retrofit design, surveying, and project management to housing associations and local authorities. Direct peer in the PAS 2035 retrofit consultancy market.
• Verco: Energy and sustainability consultancy delivering retrofit strategy, energy modelling and net-zero advisory to social housing, REITs, and corporate portfolios. Direct peer in retrofit advisory and energy modelling.

Emerging players

• Switchee: Smart thermostat and IoT data platform for social housing landlords, used to identify retrofit need and monitor performance. Emerging proptech peer with overlap in social-housing data and energy insights.
• Aira: Clean-tech heat pump installer and service company with a vertically integrated, tech-enabled delivery model across the UK and Europe. Emerging peer competing in Domna's heat pump and whole-house retrofit stack.

Broad incumbents

• Bureau Veritas: Global testing, inspection and certification incumbent with a UK building-in-sustainability and asset-management practice. Broad incumbent that competes on larger compliance, asset condition, and certification mandates.
• WSP: Global engineering consultancy with a major UK retrofit and decarbonisation practice serving social housing, investors, and public sector. Broad incumbent with overlapping retrofit advisory and design services.
• British Gas (Centrica): UK's largest energy supplier and a major installer of insulation, heat pumps and solar through its energy-services arm. Broad incumbent that runs its own PAS 2035 retrofit programmes and competes for grant-funded work.

Others

• Carbon Trust: Advisory and certification body for carbon reduction and energy efficiency, working with corporates, governments, and housing providers. Adjacent peer in retrofit advisory, certification, and policy work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInuk.linkedin.com/company/domna

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries1 record

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 Domna