21 Park Grove is an end-of-terrace house in Knotty Green, Beaconsfield, Beaconsfield (HP9 2EN). It has a recorded floor area of 63 m² (around 674 sq ft) and council tax band E. The latest certificate (December 2008) returns a high B (score 87), putting the home a stone's throw from an A rating. The latest certificate is from December 2008, so improvements made since then won't be reflected. At 63 m² this is the 11th smallest of 20 units on EPC record in the building, where floor areas span 41–487 m². The building's EPC ratings span C to B, with this unit at the top.
Held since October 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £260,000 sits 203.2% above the 2009 sale of £85,750. On a £-per-square-foot basis, the last sale (£127/sq ft) was about 67.9% below the postcode norm. 2 planning records sit against the property, 0 approved, 1 refused.
21 Park Grove's carbon output is low for the local stock.
This certificate is over 10 years old and is no longer valid.Expired 04 Dec 2018
Planning history at 21 Park Grove is exclusively tree-management applications — typical for a property with mature trees on or near the plot.
Works to trees in accordance with a submitted schedule CDC TPO (006/2004)
Latest sale on 21 Park Grove was the lowest on Land Registry record across the postcode.
£260,000
Modelled from EPC, postcode comparables.
£85,750
Recorded with HM Land Registry.
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Detailed analysis
A written breakdown of everything that matters
Price per m² for 21 Park Grove lags the street by a wide margin.
Price per m²
£1,370
Street avg £4,880
Floor Area
63 m²
Street avg 60 m²
CO₂ Emissions
1.0 t/year
Street avg 1.3 t/year
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km

Daytime· 07:00 – 23:00
44.5dB

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Reduction of limb of oak tree overhanging road - tree protected by a Tree Preservation Order
Full planning data for 21 Park Grove, Knotty Green, Beaconsfield, HP9 2EN
Every application and decision on this property and nearby, in full, in the report.
2 October 2009Most recent
£85,750
Median price across the last 5 sales in HP9 2EN: £1,725,000 (2025–2014).
12 Park Grove Knotty Green Beaconsfield
Sold May 2025
22 Park Grove Knotty Green Beaconsfield
Sold Apr 2022
15 Park Grove Knotty Green Beaconsfield
Sold Dec 2020
11 Park Grove Knotty Green Beaconsfield
Sold May 2014
8 Park Grove Knotty Green Beaconsfield
Sold May 2014
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Comparable sales data
Plus transport, crime, schools and air quality
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Years Held
17 years
Street avg 13 years
HP9 2DP
Alfriston School — bus stop.
Closest school
2.4 km
St Mary and All Saints CofE Primary School. 6 schools nearby.
Night-time· 23:00 – 07:00
37.8dB