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21 Blackwater Close, Chelmsford, CM1 7QJ

Estimated value

£449,000

  • Since the 2018 sale (£375,000)+20%
  • Against CM1 7QJ's recent median (£300,000)+50%

Newest record on this page: May 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Semi-detached
Bedrooms
3
Bathroom
1
Floor area
123 m²
1324 sq ft
Energy rating
E
Score 54
Council tax
Band D
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£449,000

  • Against its 2018 sale (£375,000)+20%
  • Against CM1 7QJ's recent median (£300,000)+50%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Blackwater Close is modelled from its 123 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in CM1 7QJ. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    123 m² from the EPC lodged in April 2018

  • Sales of this home

    1 sale recorded, the latest in 2018

  • Recent sales in CM1 7QJ

    5 sales, median £300,000 (2026–2022)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: May 2026Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

21 Blackwater Close valuation sits well clear of the typical sold price in this postcode.

Sales timeline

  1. 20 August 2018Most recent

    £375,000

Median price across the last 5 sales in CM1 7QJ: £300,000 (2026–2022).

Risks

What this page doesn't show

1 potential issue has already been flagged for 21 Blackwater Close, Chelmsford, CM1 7QJ. The detail, evidence and what to ask about it are in the Risks Report.
  • Larger development activity nearbyIn report
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

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Overview

About 21 Blackwater Close

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

21 Blackwater Close is a three-bedroom semi-detached house in Chelmsford (CM1 7QJ). It has a recorded floor area of 123 m² (around 1324 sq ft), construction records dating it to 1967-1975 and council tax band D. The latest certificate (April 2018) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 81), a 3-band jump.

At 123 m² the property is well over the postcode median (87 m² across 20 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £449,000 is 19.7% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£283/sq ft) was about 20.6% above the typical sold price in the postcode. Sold August 2018 for £375,000.

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

  • Bedrooms3
  • Bathrooms1
Before you decide

Everything you need to know about 21 Blackwater Close

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearby

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

21 Blackwater Close sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.

Current Certificate
Apr 2018

EPC Rating

A
B
C
D
E
E54
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Average
CO2 Emissions
6.6 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 16 April 2028

1 year remaining
Planning

Planning history

Applications and permits filed against 21 Blackwater Close, Chelmsford, CM1 7QJ, sourced from the PlanIt planning register.

21 Blackwater Close has no planning applications on record.

4

But the area is active

4 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.

On the street

Versus other Blackwater Close homes

Four headline reads against 15 similar houses on this street, drawn from the latest EPC and Land Registry data.

On epc rating, 21 Blackwater Close runs well behind the street norm.

Price per m²

£3,049

Street avg £3,281

On par

Floor Area

123 m²

Street avg 97 m²

Strongly above

Habitable Rooms

5 rooms

Street avg 5 rooms

Above

CO₂ Emissions

6.6 t/year

Street avg 4.0 t/year

Strongly below
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Chelmsford district page.
Full Chelmsford report

Crime

420/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Blackwater Close — bus stop.

Closest school

0.5 km

Perryfields Infant School. 26 schools nearby.

Nearest schools

  • Perryfields Infant SchoolPrimary496m
  • Perryfields Junior SchoolPrimary526m
  • The Boswells SchoolSecondary728m
  • The Tyrrells SchoolPrimary903m

Nearest stops

  • Blackwater CloseBus stop97m
  • Waveney DriveBus stop191m
  • Wear DriveBus stop377m
  • Paignton AvenueBus stop544m

Most reported crime locally

  • Violence & Sexual Offences3,276 reports43%
  • Shoplifting941 reports12%
  • Anti-social Behaviour593 reports8%
  • Public Order542 reports7%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around CM1 7QJ from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for CM1 7QJ

Daytime· 07:00 – 23:00

54.5dB

Low
Night-time road noise heatmap for CM1 7QJ

Night-time· 23:00 – 07:00

45.1dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 3 Building Survey

Late 20th centurySemi-Detached HouseEPC EExtended multiple times (2+ extensions)

Because the property has been extended more than once, we believe a Level 3 building survey should be considered.

From £1,020 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£452k

1 Boyne Drive

CM1 7QW

3 bed
£504k

1 Broomhall Gardens

CM1 7GE

3 bed2 bath
£448k

1 Court Road, Broomfield

CM1 7EW

4 bed2 bath
£501k

1 All Saints Close

CM1 7HT

2 bed1 bath
£327k

1 Coombe Rise

CM1 7DG

2 bed1 bath
£666k

1 Ayletts, Broomfield

CM1 7LE

4 bed2 bath
£294k

1 Clobbs Yard, Broomfield

CM1 7AB

2 bed1 bath
£692k

1 Chichester Drive

CM1 7RY

4 bed2 bath

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 21 Blackwater Close is modelled from its 123 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in CM1 7QJ. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 1 sale is recorded for 21 Blackwater Close. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 21 Blackwater Close was lodged in April 2018 at band E and is valid until April 2028. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to 21 Blackwater Close. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 18 months, which places each incident at an approximate point. The 26 schools and 30 stops listed are measured in a straight line from CM1 7QJ, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Council tax band
21 Blackwater Close is in council tax band D. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 Blackwater Close, Chelmsford, CM1 7QJ. Each answer is also embedded as structured data for search engines.

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