EPC Planning Calculator

27/03/2026

This calculator helps you plan and budget your journey to EPC C by breaking the process into realistic phases. It does not predict an EPC score. Instead, it helps you decide what to do, when, and how much to spend—without going over the government spending cap.

Letsana Planning Tool

EPC Planning Calculator

Build a phased EPC upgrade plan, estimate likely budget, and sense-check whether your current plan looks realistic against the planner cap.

1. Property and target

Set the current EPC position, target rating and planning milestone.

Current EPC rating Your current recorded EPC rating. Target rating The rating you want to plan towards. Property value (£) Used to estimate the planning cap for lower-value homes. Year you want to be “C-ready” Your internal planning milestone, not the legal deadline itself.

2. Summary view

Use this to sense-check total spend, cap usage and overall status.

Estimated spending cap £0 Uses a £10,000 cap, with a lower cap for some lower-value homes based on 10% of value.

Total planned upgrades £0 —

Status — —

3. Phased upgrade plan

Build the plan in stages so you can prioritise quick wins first and avoid wasted spend.

Phase 1 — Assess & plan

Now–2026 · Decide what matters and avoid wasted spend

£0

Phase 1 total £0

Phase 2 — Quick wins

2025–2027 · Lower disruption, decent uplift

£0

Phase 2 total £0

Phase 3 — Fabric & heating upgrades

2026–2028 · Bigger spend, bigger potential impact

£0

Phase 3 total £0

Phase 4 — Re-assess & final adjustments

2028–2029 · Re-check the EPC and close the remaining gap

£0

Phase 4 total £0

Phase 5 — Deadline buffer

By 1 Oct 2030 · Allow for final compliance or exemption admin

£0

Phase 5 total £0

What to do next

Use this as a planning prompt rather than a fixed answer.

Next step guidance

Start with quick wins and only then decide whether bigger-ticket upgrades are justified.

Pick your first quick-win items, then estimate whether you need any larger upgrades.

This is a budgeting and planning tool, not a guarantee of reaching a specific EPC rating. Actual EPC outcomes depend on the property, assessor inputs and whether each measure is suitable.

How the EPC Planning Calculator

Works

Step 1: Set Your Starting Point

You begin by entering:

Your current EPC rating (e.g. D or E)
Your target rating (usually C)
– Property value
– Your planning milestone year (when you want to be EPC-ready, before 2030)

From the property value, the calculator estimates your maximum spending cap:

Standard cap: £10,000
Lower-value properties: up to 10% of market value

This gives you a realistic budget boundary from the start.

Step 2: Plan Upgrades by Phase

The calculator is divided into five EPC phases, matching the recommended timeline:

Assess & Plan – EPC assessment and advice
Quick Wins – low-cost, low-disruption upgrades
Fabric & Heating – higher-impact improvements
Re-assessment – final checks and small fixes
Buffer & Compliance – contingency and admin

Each phase contains typical upgrade options with editable cost estimates.

You can:

Tick upgrades you expect to do
Adjust costs to match quotes or local prices
Leave phases empty if not needed

Step 3: Review Budget & Status

As you select upgrades, the calculator:

Totals each phase separately
Shows your overall planned spend
Compares it against the spending cap
Flags whether your plan is within budget or over

A progress bar and status label help you see this instantly.

Step 4: Get Guidance on What to Do Next

The “What to change next” section updates automatically based on:

Your EPC rating gap (e.g. D → C)
Whether you’re over or under budget
Which phases you’ve skipped

This nudges you toward the most cost-effective next step, not unnecessary upgrades.

Costs shown are typical UK estimates for planning purposes. Prices can vary significantly depending on location, property condition, and local labour rates. Use this tool to plan budgets, then confirm figures with local contractors and EPC assessors.

EPC Planning Calculator