Cold spots in winter. Overheating in summer. Bills that keep climbing. Energy-efficient construction — done with European materials and building-physics-aware detailing — solves all three, permanently.
The average UK home loses heat through poorly insulated walls, draughty windows and inadequate ventilation. You pay for warmth that disappears through the fabric of your building.
Energy-efficient construction changes that. Not with complex technology — but with careful building physics. Superior insulation, airtight construction, controlled ventilation and quality windows that work together to keep heat exactly where it belongs: inside your home.
The result is a home that stays comfortable all year round at a fraction of the running cost — and lasts for generations.
Quality extensions, deep renovations and full-house refurbs across Herefordshire, West Midlands and Wales. European materials, building-physics-aware detailing, personal oversight from Paweł.
Kitchens, bathrooms, single and two-storey extensions, loft conversions, garage conversions, energy improvements (insulation, windows, doors). See full details →
Working toward full EnerPHit retrofits. We're currently scoping our first EnerPHit projects and taking early-stage enquiries. Up to 90% heating reduction is achievable under PHI criteria.
Includes: PHPP-informed pre-assessment, fabric specification, European materials, airtightness works, MVHR installation coordination, blower door testing.
Energy-efficient new builds designed to Passive House principles. Traditional masonry or modular timber frame — with European materials and PHPP-informed pre-assessment.
Architectural drawings via our trusted UK architect partner — available to homeowners arriving without an architect already engaged. First new-build PH projects being scoped for 2026–2027. Early-stage enquiries welcome.
Not sure where to start? Paweł will run a PHPP-informed pre-assessment of your home: heat loss overview, EnerPHit feasibility, EPC improvement pathway, and indicative cost range.
Full certified PHPP models available through our PHI-accredited partner. UK-wide remote service.



Seven clear steps. No surprises. Paweł involved at every stage.
Tell us about your home. We'll tell you what's possible and what it takes to get there.
Book Free Assessment 07711 266 107Call Paweł directly
What to expect when retrofitting your home to EnerPHit-route or low-energy standard.
EnerPHit is the Passive House Institute's certification route for existing buildings, focused on dramatically reducing heating demand through high-performance insulation, airtightness, triple glazing and MVHR. APMBuild's EnerPHit-route retrofits typically cut heating demand by 85–90% and suit most UK masonry or timber-frame homes.
An EnerPHit-route retrofit delivered by APMBuild typically reduces heating demand by 85–90% compared to a pre-retrofit baseline. Actual bill savings depend on fuel type and occupancy patterns, but most homeowners see heating costs drop to a fraction of previous levels.
For deep retrofits where the entire fabric is being upgraded, most APMBuild clients choose to decant temporarily as work is more efficient and less disruptive that way. For phased or partial retrofits, staying in occupation is usually possible — we confirm this during the feasibility stage.
Most retrofits affecting external appearance, listed buildings or conservation areas require planning permission, and all projects require Building Regulations approval. APMBuild handles planning submissions, Building Control liaison and PAS 2035 documentation where applicable as part of our A–Z service.
A typical EnerPHit-route deep retrofit with APMBuild runs 4–8 months on site depending on size, complexity and whether the property is occupied. The design and PHPP modelling phase usually adds 6–10 weeks before work begins.
Every APMBuild project comes with a 24-month workmanship warranty, alongside the manufacturer warranties on installed products (windows, MVHR, insulation systems). We also provide post-completion airtightness and ventilation commissioning data.