Instructions for use: Simply select the number of bedrooms and the property’s current EPC rating. Then use the slider to choose the length of time you wish to repay your loan and its rate. Click the Calculate button. The recommendations are in order of best value to achieve your EPC ‘C’ goal for an average price property in the UK. Disclaimer: We cannot be held responsible for any calculation errors. Always use a financial adviser for professional advice.
Calculate the cost to upgrade your rental property to EPC grade C
* Costs are estimates based on current UK market rates (2024/2025). Actual costs may vary depending on property condition, location, and chosen contractors.
Always obtain professional surveys and quotes before proceeding with upgrades.
© Darron Hartas 2025
Please Share if you like, thank you!
Meeting EPC requirements is now essential for UK landlords. With stricter energy efficiency legislation approaching, rental properties with an EPC rating below Band C risk becoming unlettable, unprofitable, or subject to legal penalties.
At Index Property, we help landlords upgrade EPC ratings cost-effectively preserving rental income, increasing property value, and ensuring compliance with upcoming UK regulations. Here is one of the country’s cheapest
Energy Performance Certificates providers
An Energy Performance Certificate (EPC) ranks a property’s energy efficiency from A (most efficient) to G (least efficient). While the current legal minimum for letting in England and Wales is E, the UK government plans to raise the bar to EPC Band C for all new tenancies by 2028, and potentially all existing tenancies thereafter.
Failing to meet EPC standards can lead to:
Fines of up to £30,000
Inability to legally let the property
Decreased tenant demand and longer void periods
Lower resale value and poor financing options
Improving your property’s EPC rating is more than a compliance task—it’s a way to:
Attract quality tenants willing to pay more for efficient homes
Reduce long-term maintenance and utility-related issues
Increase property resale value and mortgage appeal
Future-proof your portfolio against changing legislation
Many landlords can reach Band C without major renovations by combining small, effective upgrades. Below are examples of high-ROI EPC improvements:
| Upgrade Type | Typical Cost | EPC Impact |
|---|---|---|
| Loft insulation | £300–£600 | Major improvement |
| Cavity wall insulation | £500–£1,000 | Major improvement |
| LED lighting throughout | £50–£150 | Moderate improvement |
| Thermostatic radiator valves | £100–£250 | Moderate improvement |
| Smart heating controls | £100–£250 | Moderate improvement |
| Draught proofing | £50–£200 | Small improvement |
We help you prioritise improvements based on EPC score uplift and return on investment not just upfront cost.
Many landlords are eligible for funding schemes to reduce the cost of EPC upgrades. These include:
Local authority retrofit grants
ECO4 (Energy Company Obligation) schemes
Interest-free loans or council-supported green finance
Potential reinstatement of the Green Homes Grant
Use the free EPC Upgrade Planner Tool at the top of this page to:
Estimate your property’s current EPC score
Forecast improvement costs and EPC rating uplift
Compare payback periods for each upgrade
Create a tailored strategy to reach Band C or higher
As EPC regulations tighten, early action means lower costs, fewer risks, and a stronger position in the rental market. Landlords who improve energy efficiency now will benefit from:
Higher tenant retention
Better rental yields
Fewer void periods
Long-term portfolio resilience
Index Property aims to help UK landlords improve EPC ratings, cut costs, and meet energy efficiency standards without overinvesting.
We recommend Energy Performance Certificates UK as your EPC provider. They use trusted professionals across the whole of the UK