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Get started9 Hartwort Close is a one-bedroom semi-detached house in Walnut Tree, Milton Keynes, Milton Keynes (MK7 7LJ). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1983-1990 and council tax band B. The latest certificate (November 2022) shows an E (score 54), well below the UK norm with real room to improve. The rating has held steady at E across 4 certificates since October 2008. Between certificates, window efficiency went from Very Poor to Average, lighting went from Good to Very Good and main heating went from Poor to Average. The recommended improvements would lift it to B (score 85), a 3-band jump. Main heating runs on electricity.
It hasn't traded since December 1999, a hold of 26 years that's notably long for the area. Sale prices here have outpaced Milton Keynes HPI: 12.3% per year against 0% for the wider region. Today's modelled estimate of £205,000 sits 290.5% above the 1999 sale of £52,500. On a £-per-square-foot basis, the last sale (£104/sq ft) was about 25.5% below the postcode norm. At 47 m² it sits well below the postcode median (68 m² across 23 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 87% of similar EPCs).
Recommended upgrades on file would lift this property by multiple EPC bands.
9 Hartwort Close's modelled value sits at over four times its earliest registered sale price (1997).
£205,000
Modelled from EPC, postcode comparables and a sale-price growth of 12.3% per year over 2 years.
£52,500
Growth on file: 12.3% per year over 2 years.
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On co₂ emissions, 9 Hartwort Close runs well behind the street norm.
Price per m²
£1,117
Street avg £2,947
Floor Area
47 m²
Street avg 60 m²
Habitable Rooms
2 rooms
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Silverweed Court — bus stop.

Daytime· 07:00 – 23:00
55.5dB

Changes detected from historical EPC data
Single glazing replaced with double or better glazing
Heating system changed
Heating controls upgraded for better temperature management
Hot water system changed
Low energy lighting percentage decreased
Heating system upgraded to a more efficient system
Heating controls changed
Hot water system upgraded
Loft insulation upgraded to recommended levels
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
3 December 1999Most recent
£52,500
+26.5%over 2 years21 November 1997
£41,500
Median price across the last 5 sales in MK7 7LJ: £230,000 (2025–2021).
17 Hartwort Close Walnut Tree Milton Keynes
Sold Aug 2025
30 Hartwort Close Walnut Tree Milton Keynes
Sold Oct 2023
28 Hartwort Close Walnut Tree Milton Keynes
Sold Dec 2021
18 Hartwort Close Walnut Tree Milton Keynes
Sold Oct 2021
15 Hartwort Close Walnut Tree Milton Keynes
Sold Jun 2021
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Detailed EPC data
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Street avg 3 rooms
CO₂ Emissions
4.9 t/year
Street avg 3.3 t/year
MK7 7LB
Closest school
0.3 km
Walton High. 19 schools nearby.
Night-time· 23:00 – 07:00
44.7dB