20 Mount Keen, Stevenage, SG1 6BP
About 20 Mount Keen
20 Mount Keen is a five-bedroom detached house in Stevenage (SG1 6BP). It has a recorded floor area of 169 m² (around 1819 sq ft), construction records dating it to 1996-2002 and council tax band F. Tenure is freehold. The latest certificate (March 2024) shows a D (score 59), a step below the typical UK home. The rating has held steady at D across 3 certificates since October 2011. Between certificates, lighting went from Poor to Very Good; while window efficiency dropped from Good to Average and main heating dropped from Good to Very Poor. Main heating runs on electricity. The home occupies a cul-de-sac position.
Across 2003–2012, sale prices on this property compounded at 1.6% per year. Today's modelled estimate of £613,000 sits 80.3% above the 2012 sale of £340,000. On the market in June 2012 and unlisted since — roughly 14 years.
Know exactly what you're buying at 20 Mount Keen
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms5
- Bathrooms3
- CloakroomYes
- StudyYes
Outside
- GarageYes
- Cul-de-sacYes
Building
- TenureFreehold
Energy performance
20 Mount Keen's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Floor insulation added or improved
More low energy lighting installed
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
Cavity wall insulation installed
Planning history
20 Mount Keen has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
Sales history & valuation
20 Mount Keen saw 3 transfers in just over a decade — high turnover for the postcode.
£613,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.6% per year over 9 years.
£340,000
Growth on file: 1.6% per year over 9 years.
Sales timeline
28 June 2012Most recent
£340,000
+2.3%over 5 years10 November 2006
£332,500
+11.6%over 2 years12 December 2003
£298,000
Median price across the last 5 sales in SG1 6BP: £565,000 (2025–2020).
Everything we know about 20 Mount Keen, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?
Versus other Mount Keen homes
20 Mount Keen is notably below the street on epc rating.
Price per m²
£2,012
Street avg £2,800
Floor Area
169 m²
Street avg 148 m²
Habitable Rooms
8 rooms
Street avg 8 rooms
CO₂ Emissions
6.3 t/year
Street avg 5.1 t/year
Similar properties nearby
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
20/mo
Rising year-on-year across the wider district.
Nearest stop
0.4 km
Fairfield Way — bus stop.
Closest school
0.8 km
Round Diamond Primary School. 13 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
43.8dB
Night-time· 23:00 – 07:00
36.0dB