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Get started20 Chalfont Court is an end-of-terrace house in Barnet, London, London (NW9 6DY). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (February 2026) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in July 2024 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Good, hot-water efficiency went from Poor to Average and lighting went from Very Poor to Very Good; while window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 74). Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition. At 56 m² this is the 10th smallest of 20 units on EPC record in the building, where floor areas span 42–82 m². The building's EPC ratings span E to C across 20 units on file.
Sale prices here have outpaced London HPI: 7.2% per year against 0% for the wider region. Today's modelled estimate of £297,000 sits 185.6% above the 2024 sale of £104,000. On a £-per-square-foot basis, the last sale (£173/sq ft) was about 28.4% below the postcode norm. It changed hands recently, sold November 2024 for £104,000.
20 Chalfont Court's carbon output is low for the local stock.
20 Chalfont Court's estimated value is more than triple its earliest registered sale price (2024).
£297,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.2% per year over 1 year.
£104,000
Growth on file: 7.2% per year over 1 year.
On years held, 20 Chalfont Court runs well behind the street norm.
Price per m²
£1,857
Street avg £3,869
Floor Area
56 m²
Street avg 58 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
Rail-style transport is unusually close for this postcode.
Crime
15/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Clovelly Avenue — bus stop.

Daytime· 07:00 – 23:00
55.2dB

Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
Heating system upgraded to a more efficient system
Hot water system upgraded
Wall insulation improved
Loft insulation installed or upgraded to 250mm+
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
29 November 2024Most recent
£104,000
+7.2%12 September 2024
£97,000
Median price across the last 5 sales in NW9 6DY: £315,000 (2023–2019).
12a Chalfont Court Colindeep Lane Barnet London
Sold Jul 2023
19 Chalfont Court Colindeep Lane Barnet London
Sold Feb 2023
10 Chalfont Court Colindeep Lane Barnet London
Sold Sept 2022
2 Chalfont Court Colindeep Lane Barnet London
Sold Nov 2020
8 Chalfont Court Colindeep Lane Barnet London
Sold Aug 2019
CO₂ Emissions
1.0 t/year
Street avg 2.8 t/year
NW9 6FR
Closest school
0.3 km
Colindale Primary School. 48 schools nearby.
Flood risk
Low
From the Environment Agency.
Night-time· 23:00 – 07:00
45.2dB
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