12b, High Street, Seal, Sevenoaks, TN15 0AJ
About 12b
12b is a four-bedroom property in Seal, Sevenoaks, Sevenoaks (TN15 0AJ). It has a recorded floor area of 147 m² (around 1582 sq ft). The latest certificate (March 2016) returns a B (score 84), comfortably above the UK average. The latest certificate is from March 2016, so improvements made since then won't be reflected.
At 147 m² the property is well over the postcode median (108 m² across 16 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Across 2017–2021, sale prices on this property compounded at -0.9% per year. Today's modelled estimate of £718,000 is 14% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£398/sq ft) was about 46.3% above the typical sold price in the postcode. Last sale on file: £630,000 in January 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 12b
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
- Bedrooms4
- Bathrooms3
- EnsuiteYes
Outside
- ParkingYes
Energy performance
12b ranks among the most efficient homes in the postcode for energy use.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 10 Mar 2026
EPC Rating
Planning history
12b has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at 12b
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
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£718,000
Modelled from EPC, postcode comparables and a sale-price growth of -0.9% per year over 4 years.
£630,000
Growth on file: -0.9% per year over 4 years.
Sales timeline
29 January 2021Most recent
£630,000
-3.4%over 3 years9 February 2017
£652,500
Median price across the last 5 sales in TN15 0AJ: £560,000 (2025–2021).
Nearby sales in TN15 0AJ
22 High Street, Seal, Sevenoaks, TN15 0AJ
Sold Sept 2025
£255,000Abbots House, High Street, Seal, Sevenoaks, TN15 0AJ
Sold Jun 2023
£1,460,00014 High Street, Seal, Sevenoaks, TN15 0AJ
Sold Jan 2023
£560,00010 High Street, Seal, Sevenoaks, TN15 0AJ
Sold Mar 2021
£700,0008 High Street, Seal, Sevenoaks, TN15 0AJ
Sold Mar 2021
£388,000
Everything we know about 12b, 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 High Street homes
12b outperforms the street on epc rating by a wide margin.
Price per m²
£4,286
Street avg £4,562
Floor Area
147 m²
Street avg 128 m²
CO₂ Emissions
2.2 t/year
Street avg 5.3 t/year
Years Held
5 years
Street avg 6 years
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The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
The Crown — bus stop.
Closest school
0.5 km
Seal Church of England Primary School. 7 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
48.0dB
Night-time· 23:00 – 07:00
40.6dB