21a, Whittlebury Road, Silverstone, Towcester, NN12 8UN
About 21a
21a is a five-bedroom detached house in Silverstone, Towcester, Towcester (NN12 8UN). It has a recorded floor area of 161 m² (around 1733 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (July 2019) shows a C (score 72). The recommended improvements would push it to B (score 81).
At 161 m² the property is well over the postcode median (65 m² across 26 EPCs), placing it in the larger end of the local stock. Across 1997–2021, sale prices on this property compounded at 4.5% per year. Today's modelled estimate of £570,000 is 17.5% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£280/sq ft) was about 16% above the typical sold price in the postcode. Last sale on file: £485,000 in March 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 21a
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms5
- Bathrooms3
- Dining roomYes
- Utility roomYes
- CloakroomYes
- EnsuiteYes
- StudyYes
Outside
- GarageDouble
Building
- Central heatingYes
Energy performance
EPC Rating
Planning history
21a has no planning applications on record.
Notable planning nearby
16applications of note in the surrounding area
We flagged 1 thing worth checking at 21a
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Sale price has at least doubled since 1997.
£570,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.5% per year over 23 years.
£485,000
Growth on file: 4.5% per year over 23 years.
Sales timeline
30 March 2021Most recent
£485,000
+177.1%over 23 years21 November 1997
£175,000
Median price across the last 5 sales in NN12 8UN: £305,000 (2025–2024).
Nearby sales in NN12 8UN
Brook Court, Flat 7, Whittlebury Road, Silverstone, Towcester, NN12 8UN
Sold Sept 2025
£125,00021 Whittlebury Road, Silverstone, Towcester, NN12 8UN
Sold Feb 2025
£482,50023a, Whittlebury Road, Silverstone, Towcester, NN12 8UN
Sold Nov 2024
£565,00019 Whittlebury Road, Silverstone, Towcester, NN12 8UN
Sold Jul 2024
£305,0002d, Whittlebury Road, Silverstone, Towcester, NN12 8UN
Sold Mar 2024
£270,000
Everything we know about 21a, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Whittlebury Road homes
Floor Area for 21a runs comfortably ahead of the street norm.
Price per m²
£3,012
Street avg £3,314
Floor Area
161 m²
Street avg 111 m²
Habitable Rooms
9 rooms
Street avg 6 rooms
CO₂ Emissions
4.4 t/year
Street avg 4.9 t/year
Similar properties nearby
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NN12 8DQ
1 Bengal Lane, Greens Norton
NN12 8BE
1 Baines Close, Silverstone
NN12 8DG
1 Birds Hill Road, Eastcote
NN12 8NF
1 Brabham Close, Silverstone
NN12 8UL
1 Bradden Road, Greens Norton
NN12 8BS
1 Bradden Way, Greens Norton
NN12 8BY
1 Brackley Road, Silverstone
NN12 8UA
The neighbourhood at a glance
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
0.1 km
White Horse PH — bus stop.
Closest school
0.6 km
Silverstone Church of England Primary School. 3 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
48.9dB

Night-time· 23:00 – 07:00
41.5dB