Your Green Home Is Worth More Than You Think.
We translate your property's energy performance certificate into basis-point savings — securing rates conventional brokers can't access.
The number on the page, lower than you expected.
Every card below is a real property type. Click to see exactly which upgrades moved the rate — and by how many basis points.
External solid-wall insulation reduced heat loss by 40%, lifting EPC by two sub-bands.
Air-source heat pump replaced gas boiler, removing fossil-fuel dependency flagged by green lenders.
Period-appropriate triple-glazed sashes retained character while eliminating a cold-bridge penalty.
Roof-integrated solar array with battery storage qualifies for our Tier-1 green lender panel — the single biggest rate lever.
MVHR system demonstrated air-tightness below 1.0 ACH, a passive-house prerequisite for premium bands.
Certified low-carbon structural system recognised by four lenders on our panel for embodied-carbon credits.
PHI certification is recognised by seven lenders on our panel as the gold standard — unlocking our deepest rate discount.
Net-zero energy balance over 12 months demonstrated via smart-meter data submission.
GSHP with CoP of 4.1 removes gas dependency entirely, triggering green-tariff eligibility with three lenders.
Homeowners with solar panels saved an average of £9,400 over their mortgage term.
Every upgrade moves the rate. Here's by how much.
Our lender panel weights 14 energy features. Below are the six that move the needle most — measured in basis points and pounds over a 10-year term.
Solar PV Array
A roof-mounted solar array — particularly with battery storage — is the single highest-weighted feature across our lender panel.
Heat Pump (ASHP / GSHP)
Replacing a gas boiler with a heat pump removes the fossil-fuel dependency flag that suppresses rates with green lenders.
Wall & Roof Insulation
Solid-wall or cavity insulation is the most accessible upgrade and often the fastest route from EPC D to B.
Triple Glazing
Triple-glazed units eliminate cold-bridge penalties and contribute meaningfully to air-tightness scores.
Passivhaus Certification
PHI or EnerPHit certification is recognised by seven lenders on our panel as the gold standard — unlocking our deepest rate tier.
MVHR System
Mechanical ventilation with heat recovery demonstrates air-tightness — a prerequisite for passive-house lender bands.
Share your EPC
Upload your certificate or answer three quick questions about your property's features.
We map your rate
Our team cross-references your energy data against 47 lenders' green criteria in real time.
See the number
You receive a personalised indicative rate comparison — standard versus green — in one sheet.
We handle everything
From application to completion, your dedicated adviser manages the process end to end.
"Greenstone found us a rate 0.43% below what our bank quoted. On a £580k mortgage, that's life-changing."
"I had three EPC certificates and no idea which lender would recognise them. Greenstone turned that into a 0.38% discount in two weeks."
"Our passive house was worth 41 basis points to Greenstone's lender panel. The adviser explained every decimal."
Start with a number. Any number.
You don't need an EPC certificate to find out what your green rate could be. Our quiz takes four minutes and gives you an indicative rate based on your property's energy features.
Already have your EPC? Book directly and skip the quiz.