14a, High Street, Seal, Sevenoaks, TN15 0AJ
About 14a
14a is a semi-detached house in Seal, Sevenoaks, Sevenoaks (TN15 0AJ). It has a recorded floor area of 117 m² (around 1259 sq ft) and construction records dating it to before 1900. The latest certificate (March 2021) shows a D (score 56), a step below the typical UK home. When first surveyed in September 2011 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Poor to Good and hot-water efficiency went from Average to Good. The recommended improvements would lift it to B (score 86), a 2-band jump.
13 planning records sit against the property, 11 approved, 2 refused. Past consents include change of use to residential, meaningful when judging how the property has evolved. Across 2002–2020, sale prices on this property compounded at 3.7% per year. Today's modelled estimate of £479,000 is 49.7% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£254/sq ft) was about 22.7% below the postcode norm. Last sale on file: £320,000 in February 2020.
Know exactly what you're buying at 14a
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
Energy performance
14a's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Changed to a more efficient fuel source
Hot water system changed
Single glazing replaced with double or better glazing
Wall insulation upgraded
Roof insulation improved
Floor insulation added or improved
Upgraded to gas central heating
Connected to mains gas supply
Hot water system upgraded
Roof insulation improved
Planning history
14a has been through 11 approved planning applications — a well-evolved property.
- Jan 2018Change of UseHeritageIn report
Change of use from office use to residential use. Internal and external alterations to enable conversion to be implemented.
- Documents
- 8 docs on file
- Reference
- 17/03437/LBCALT
- Jan 2018Change of UseFullIn report
Change of use from office use to residential use. Internal and external alterations to enable conversion to be implemented.
- Documents
- 19 docs on file
- Reference
- 17/03436/FUL
We flagged 1 thing worth checking at 14a
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.
£479,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.7% per year over 17 years.
£320,000
Growth on file: 3.7% per year over 17 years.
Sales timeline
11 February 2020Most recent
£320,000
+30.6%over 10 years18 December 2009
£245,000
+44.1%over 7 years10 October 2002
£170,000
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 14a, 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
Price per m² for 14a lags the street by a wide margin.
Price per m²
£2,735
Street avg £4,734
Floor Area
117 m²
Street avg 131 m²
Habitable Rooms
4 rooms
Street avg 6 rooms
CO₂ Emissions
6.6 t/year
Street avg 4.9 t/year
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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