23 Blackwater Avenue, Colchester, CO4 3UY
About 23 Blackwater Avenue
23 Blackwater Avenue is a three-bedroom semi-detached house in Colchester (CO4 3UY). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1976-1982 and council tax band C. The latest certificate (May 2018) shows a C (score 71). The recommended improvements would push it to B (score 84).
Across 1999–2018, sale prices on this property compounded at 7.5% per year. Today's modelled estimate of £310,000 is 14.8% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£314/sq ft) was about 85.1% above the typical sold price in the postcode. 8 years since the last transfer (July 2018). At 80 m² it's 17.5% smaller than the typical home in the postcode (97 m² median across 14 EPCs).
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Dining roomYes
Outside
- Private gardenRear
- GarageYes
Energy performance
EPC Rating
Certificate validity
Valid until 16 May 2028
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Planning history
23 Blackwater Avenue has no planning applications on record.
But the area is active
8 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Sale price has grown by over 3x since 1999.
£310,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.5% per year over 19 years.
£270,000
Growth on file: 7.5% per year over 19 years.
Sales timeline
17 July 2018Most recent
£270,000
+292.7%over 18 years29 July 1999
£68,750
Median price across the last 5 sales in CO4 3UY: £360,000 (2026–2021).
Nearby sales in CO4 3UY
17 Blackwater Avenue, Colchester, CO4 3UY
Sold Jan 2026
£360,0008 Blackwater Avenue, Colchester, CO4 3UY
Sold Jan 2025
£375,00018 Blackwater Avenue, Colchester, CO4 3UY
Sold Jul 2024
£388,00016 Blackwater Avenue, Colchester, CO4 3UY
Sold Mar 2021
£297,00029 Blackwater Avenue, Colchester, CO4 3UY
Sold Mar 2021
£295,000
Versus other Blackwater Avenue homes
23 Blackwater Avenue is notably below the street on floor area.
Price per m²
£3,375
Street avg £2,594
Floor Area
80 m²
Street avg 105 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
2.8 t/year
Street avg 4.2 t/year
Similar properties nearby
The neighbourhood at a glance
Crime
430/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Welshwood Park — bus stop.
Closest school
0.3 km
Roach Vale Primary School. 17 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
50.5dB

Night-time· 23:00 – 07:00
41.0dB







