Build Cost & Energy Savings Calculators Know the numbers before you commit.
Indicative figures based on real PHI passive house performance criteria. Adjust the sliders to match your property, then book a PHPP pre-assessment — certified energy figures come from our PHI-accredited partner.
How much could you save on heating?
Enter your current heating costs to see what a passive house retrofit could achieve. Based on the 85–90% space-heating reduction reported in published EnerPHit retrofits.
Your property
£2,200
£500£8,000
130m²
50 m²400 m²
Your estimated results
After retrofit Annual heating cost
£300
estimated
Annual saving
£1,900
vs current bills, at today's prices
Over 25 years Cumulative saving
£74,000
energy prices rising 3.5% a year (£47,500 at today's prices)
Annual CO₂ saved
5.3t
kgCO₂e — gas-heated baseline
CO₂ saved over 25 yrs
134t
cumulative carbon impact
Annual heating cost comparison
Current home£2,200
After EnerPHit-standard retrofit£300
Payback on the energy-improvement premium: Over 25 years— energy savings alone won't repay the premium within 25 years; the case rests on comfort, health and durability.
Based on the 85–90% space-heating reduction reported in published EnerPHit retrofits; this is not a guaranteed or measured APMBuild result. Assumptions: energy prices rise 3.5% a year (used for both the 25-year saving and the payback); the energy-improvement premium over a standard refurbishment is £750/m² of floor area; CO₂ uses a gas tariff of 6.5p/kWh and 0.183 kgCO₂e/kWh. Actual results vary with construction type, existing fabric, location and specification. Figures are indicative only and exclude VAT.
Get your free property assessment
These are ballpark figures. For costs specific to your home, book a free 30-minute call with Paweł. Certified energy figures come from a full PHPP model by our PHI-accredited partner.
Indicative cost ranges for residential passive house projects in Herefordshire and the surrounding counties. Includes European materials sourcing, often below UK-equivalent pricing for the same specification, with a like-for-like comparison on every quote.
Your project
130m²
60 m²400 m²
G
F
E
D
C
B
A
Current: ETarget after project: A
Indicative project figures
Project cost range
£234k–338k
full project, indicative ±15%
Illustrative materials saving
~£23k
at 22% on materials (assumption — your quote shows the real comparison)
25-year energy saving
£88k
estimated, energy prices rising 3.5% a year
EnerPHit deep retrofit: PHPP pre-assessment, European materials, airtightness works, MVHR installation, blower door test and 24-month warranty. Based on £1,800–2,600/m².Materials saving is illustrative: it assumes materials are about 45% of the build cost and applies 22% to that share only. EU materials are often below UK-equivalent pricing, but there is no fixed saving — every quote includes a like-for-like comparison. Energy saving assumes the space-heating reduction reported in published EnerPHit retrofits and energy prices rising 3.5% a year.
Get an accurate quote
Costs vary significantly by property type, condition and specification. A free survey gives you accurate figures and a no-obligation cost plan.
Indicative European materials cost for your low-energy or passive-house-informed project — CE/UKCA compliant, delivered UK-wide typically in 5–10 days. Compare directly against UK market pricing.
Project specification
320m²
100 m²1,000 m²
130m²
60 m²400 m²
Materials cost comparison
APMBuild EU supply
£46k
ex. VAT, delivered UK
UK market equivalent
£59k
illustrative, at the 22% assumption
Illustrative saving
£13k
at 22% (assumption — your quote shows the real comparison)
Cost comparison
UK market pricing£59k
APMBuild EU supply£46k
EnerPHit spec: external insulation system, triple-glazed windows (Uw ≤0.80 W/m²K, g 0.50+), MVHR unit (≥75% efficiency), airtightness membrane and tape system. CE/UKCA compliant. Typically 5–10 day delivery; custom windows 4–8 weeks. The UK figure is illustrative: it assumes the EU price is 22% below the UK equivalent. There is no fixed saving — every quote includes a like-for-like comparison.
Receive a detailed materials quote
Full product specifications, CE/UKCA declarations and delivery schedule. Trade accounts available for architects and contractors.
Indicative build cost, materials saving and EPC premium for passive house residential schemes. JV partnership options available for qualifying sites.
Your scheme
6units
1 unit30 units
90m²
50 m²200 m²
Scheme financials
Total build cost
£1.40m
indicative ±15%
Illustrative materials saving
£139k
at 22% on materials (assumption — your quote shows the real comparison)
EPC A sale premium
£51k
scheme total: 6 units × ≈£8.5k uplift vs EPC D
Passive House new build. £2,600/m² all-in. EPC A standard. 8–10 months per unit. 24-month workmanship warranty. JV partnership options for qualifying schemes. Materials saving is illustrative: it assumes materials are about 45% of the build cost and applies 22% to that share only. There is no fixed saving — every quote includes a like-for-like comparison. The sale premium is an estimate of ≈£8.5k per unit, shown as a scheme total.
Discuss your scheme
JV partnership options available for qualifying residential sites in Herefordshire and the surrounding counties.
All figures are indicative only. Actual costs and savings depend on property type, construction, location, site conditions and specification. All prices exclude VAT. For accurate project figures, contact APMBuild for a free assessment. APMBuild Ltd. Reg. 16087373. VAT: GB480321319.