What is the cheapest way to gain points?

Usually finding evidence of work already done. After that, heating controls and hot water cylinder insulation are inexpensive where they apply.

Will a new boiler get me to band C?

It depends where you are starting. Replacing electric room heaters can be transformative; replacing a fairly modern condensing boiler with a newer one usually is not.

Does solar always help?

It scores well, but it is one of the more expensive routes per point. On a property that needs only a few points there are almost always cheaper options.

Can I get a rating without doing the work?

No. An assessor records what is physically present on the day. Anyone offering a rating without an assessment is not offering a lawful certificate.

Do I need a new EPC after improvements?

Yes, if you want the improvement recorded. The register does not update itself, and for the 2030 standard it is the lodged certificate that counts.

How to actually improve an EPC rating

The score runs from 1 to 100. Band C starts at 69. Most of the advice written about improving it is generic, and generic advice is close to useless here, because what is worth doing depends entirely on what the building already has.

Start with the certificate, not a list

Every EPC carries a set of recommended improvements in the order the assessor set them, with the rating the property reaches after each step. That sequence is specific to the building and is far better than any general advice, including this page.

Enter a postcode to see the actual sequence for a property, taken from its own certificate.

See the route to band C

C69

The score runs 1 to 100. Band C starts at 69, band D at 55. Most properties needing work sit in the mid to high 50s.

What tends to move the score most

Across recent certificates in Birmingham and the Black Country, the measures with the largest typical effect are heating and fabric, not the small items people usually start with.

Replacing electric room heaters with a modern heating system. The single biggest change available on most properties that have them.
Wall insulation, where the walls are currently uninsulated. Expensive on solid walls, and often the only route to C.
Room-in-roof and flat roof insulation, on the properties that have them.
Replacing a non-condensing boiler.
Solar photovoltaic panels, which score well but cost accordingly.

Loft insulation and low-energy lighting are worth doing and worth very little on the score, because most properties have already had them. They are cheap points, not big ones.

Typical gains by measure, computed from certificates lodged across our area in the last five years, are on each postcode page.

Browse postcode data

The thing that costs people points for free

Work that has been done but cannot be seen or evidenced is recorded as though it was never done. Cavity wall insulation behind a finished wall, underfloor insulation, an upgraded boiler with no paperwork — all of it defaults to the pessimistic assumption.

Guarantees, building control certificates and installer invoices are worth digging out before an assessment. It is the cheapest way to gain points that already exist.

Where funding may help

Grant schemes change often and eligibility is usually tied to the property, the household, or both. ECO4 is scheduled to close at the end of December 2026, which makes it worth checking sooner rather than later if it applies.