Postcode district
EPC ratings in CM21
CM21 in East Hertfordshire has 2,930 properties with EPC certificates. The average rating is D, matching the East Hertfordshire average. Browse sectors below or search for a specific address to view detailed property data. The area is predominantly house (73%). The most frequently recommended improvement is solar photovoltaic panels, 2.5 kwp.
EPC distribution
Percentage of properties in each EPC band across CM21.
Property type mix
Distribution of property types (houses, flats, bungalows) within CM21.
In CM21, the most common EPC-rated properties are house (around 73%) and flat (around 18%). This mix shapes how easy it is for local homes to improve their EPC ratings.
Top recommendations
Improvements most often recommended in this district.
- 1
Solar photovoltaic panels, 2.5 kWp
3179 occurrences · Code M
- 2
Solar water heating
2804 occurrences · Code L
- 3
Low energy lighting for all fixed outlets
1772 occurrences · Code H
- 4
Replace boiler with new condensing boiler
1003 occurrences · Code J
- 5
Floor insulation (solid floor)
980 occurrences · Code E
Check a specific property
Enter your postcode to view an EPC report
Pick your address to see live EPC data and improvement recommendations.
Partner Booking
Book an EPC assessment in CM21
Book an accredited EPC assessment, Gas Safety certificate or EICR with EPC UK — qualified assessors covering your area.