Healthy Homes Network connects UK households to TrustMark + PAS 2035-accredited retrofit assessors. 15 assessment categories. 253 UK cities. Live data from the TrustMark register.
Pick the assessment your home or project needs. Each category page shows assessors accredited specifically for that scope, in your area.
Whole-house PAS 2035 retrofit assessment by an accredited Retrofit Assessor. Required for ECO4 + most BUS-funded heat pump installs.
Find assessorDomestic Energy Performance Certificate for property sale, lease, or grant eligibility. By a Domestic Energy Assessor (DEA).
Find assessorIdentifies thermal bridges, missing insulation, and air leakage paths via infrared imaging. Often used pre + post retrofit.
Find assessorDiagnostic survey of damp + mould issues. Identifies cause (rising / penetrating / condensation) and recommends remediation.
Find assessorMeasures CO₂, VOCs, PM2.5, humidity. Critical for post-retrofit ventilation verification + asthma/respiratory casework.
Find assessorMandatory after airtight retrofit. Audits MVHR/MEV/PIV system performance, commissioning data, balancing.
Find assessorPre-refurb / pre-demolition asbestos survey. Required by CAR 2012 for any 1980s-or-earlier property undergoing major work.
Find assessorPre-1992 properties. Lead paint sample testing, exposure risk assessment, abatement specification for retrofit work.
Find assessorUKHSA-classified radon-affected areas (largely SW England, parts of Midlands). 3-month passive monitor + remediation if >200 Bq/m³.
Find assessorInternal + external noise assessment. Required for some planning consents, noise complaints, and insulation specification.
Find assessorHome adaptation needs assessment by an OT or specialist surveyor. Routes into Disabled Facilities Grant funding.
Find assessorSee the full directory: pre-purchase building, healthy homes standard, lighting/daylighting, vulnerable occupant, and more.
Browse directoryPAS 2035 is the UK's specification for the energy retrofit of domestic buildings. It defines the framework, the roles, and the standard of work expected for any whole-house retrofit project.
Every retrofit project is risk-rated A/B/C based on building heritage, occupancy, and complexity. Higher-risk projects require more senior accreditation levels (e.g. Retrofit Coordinator).
PAS 2035 prevents single-measure damage (e.g. heat pump in a leaky house, solid-wall insulation without ventilation). Every measure has to be considered in the context of the whole building.
ECO4 measures, most BUS heat pump installs, and Local Authority Flex schemes all require PAS 2035-aligned design + monitoring + evaluation.
The standard explicitly accounts for occupant health: ventilation, moisture, IAQ, vulnerable occupant adaptations. The right retrofit improves health; the wrong retrofit harms it.
If you're researching ECO4, BUS, GBIS, or a Local Authority Flex scheme, our sister site Green Home Grants signposts every UK grant route with a household-level eligibility checker.
Damp, mould, and indoor-air-quality issues frequently sit downstream of the same underlying problem: a home that has been part-improved (boiler swapped, loft topped up) without the corresponding ventilation upgrade. The funding routes that pay for the full package — fabric, heating, and ventilation specified together — sit on the Eco Saving Hub grant-routing surface, which covers ECO4, GBIS, Boiler Upgrade Scheme, and the LA Flex pathways into all three. Most occupants experiencing recurring damp or mould issues never connect their symptoms to the underlying retrofit gap, and the contractors patching the visible symptom (anti-mould paint, dehumidifier, replacement window) rarely diagnose the root cause. The integrated approach is to use the grant-routing surface to fund the underlying fabric, heating, and ventilation works together, rather than treating the symptoms in series. The grant-routing surface tests eligibility across every active scheme in 2026 and routes qualifying households to vetted installers operating under the scheme PAS-2030 compliance regime.
The household-level remediation guidance on this site addresses the practical-action side of the indoor-environment-and-health question, but the underlying clinical-and-research evidence that justifies the household-level spend sits at Eco Health Partners. The partnerships library covers the intersection of indoor environments and human health outcomes, structured to be quoted directly by clinicians, social-prescribing teams, and housing officers building referral pathways for damp-and-mould remediation and broader indoor-air-quality intervention. The library updates quarterly as new peer-reviewed evidence on indoor-air-quality and health outcomes is published, so practitioners citing it can trust they are working from current evidence rather than legacy material. The two surfaces work together: this site for the practical-action recommendations, the partnerships library for the clinical framing that justifies the household-level investment to commissioners, housing officers, or family decision-makers. Together they give the full evidence base behind a household-level health-and-environment intervention, from peer-reviewed clinical evidence through to specific household actions and the funded-pathway routing that connects them.
Beyond the damp-and-mould remediation focus on this site, households planning a wider lifestyle response to indoor-environment-and-health concerns will benefit from the green living resources library at Green Living Experts. The library covers the broader sustainable-living context that sits around the specific remediation work here, including the smaller household actions (draught-sealing, smart-meter optimisation, radiator-balancing, cold-spot mitigation) and the longer-term whole-home choices (deep retrofit sequencing, fabric-first decision logic, ventilation specification) that prevent the underlying conditions driving damp-and-mould problems in the first place. The two sites are designed to be used together: this site for the immediate remediation work, the resources library for the prevention-and-lifestyle context that stops the problem recurring after the immediate works are complete. The library updates regularly as new evidence emerges on household-level sustainability decisions, and the editorial register is readable by occupants, referrers, and contractors without assuming a technical-specification background. The combination gives a household the full toolkit from immediate remediation through to long-term prevention.
The household-level guidance on this site addresses the consumer side of damp, mould, and indoor-air-quality issues, but a significant share of the UK's most affected housing sits inside institutional estates managed by social landlords, housing associations, build-to-rent operators, and educational or healthcare facilities. The FM energy-hub reference procurement playbook at UKFM addresses the same indoor-environment issues at the institutional scale, covering retrofit sequencing for multi-site portfolios where the same fabric-and-ventilation decisions are being made at hundreds or thousands of properties at once. The playbook is the canonical UK reference for net-zero retrofit sequencing across these estate types and is open about the procurement-decision logic that drives whether tenants in a given estate get a properly-specified retrofit package or a value-engineered version that risks the unintended-consequence trap on damp-and-mould outcomes. Tenants and leaseholders advocating for better retrofit specifications in their estate can cite the procurement playbook directly in their conversations with their landlord, building-services consultant, or local-authority commissioning team.