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Get started21 Blackwater Court is a two-bedroom semi-detached house in Maldon (CM9 5HW). It has a recorded floor area of 68 m² (around 732 sq ft), construction records dating it to 1950-1966 and council tax band B. At 68 m² this is the smallest unit on EPC record across the building (68–69 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (47 versus a best of 80). The latest certificate (January 2016) shows an E (score 47), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 77), a 2-band jump. The latest certificate is from January 2016, so improvements made since then won't be reflected.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2016–2021, sale prices here grew 0.3% per year, broadly in step with Maldon's 0% HPI growth. Today's modelled estimate of £217,000 is 17.3% above the 2021 sale price. Last sale on file: £185,000 in October 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
21 Blackwater Court sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
This certificate is over 10 years old and is no longer valid.Expired 20 Jan 2026
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£217,000
Modelled from EPC, postcode comparables and a sale-price growth of 0.3% per year over 5 years.
£185,000
Growth on file: 0.3% per year over 5 years.
On epc rating, 21 Blackwater Court runs well behind the street norm.
Price per m²
£2,721
Street avg £3,657
Floor Area
68 m²
Street avg 57 m²
Habitable Rooms
3 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km

Daytime· 07:00 – 23:00
44.8dB

19 October 2021Most recent
£185,000
+1.6%over 5 years5 August 2016
£182,000
Median price across the last 5 sales in CM9 5HW: £290,000 (2024–2022).
Street avg 3 rooms
CO₂ Emissions
5.0 t/year
Street avg 2.0 t/year
CM9 5JD
Victoria Road — bus stop.
Closest school
0.3 km
Maldon Primary School. 7 schools nearby.
Night-time· 23:00 – 07:00
36.8dB
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