12 Tylney Avenue is a four-bedroom semi-detached house in Southwark, London, London (SE19 1LN). It has a recorded floor area of 131 m² (around 1410 sq ft), construction records dating it to 1967-1975 and council tax band E. The latest certificate (November 2021) shows an E (score 46), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 66).
One planning record on file: an extension approved in 2022. Past consents include an extension, new windows and partial demolition, meaningful when judging how the property has evolved. At 131 m² it's 17% larger than the typical home in the postcode (112 m² median across 19 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs). Today's modelled estimate of £882,000 is 30.1% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£481/sq ft) was about 45.6% above the typical sold price in the postcode. Sold May 2022 for £678,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
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12 Tylney Avenue's carbon output runs well above what efficient homes in the postcode produce.
Planning history includes recorded demolition works, indicating a major rebuild phase at this address.
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.
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£882,000
Modelled from EPC, postcode comparables.
£678,000
Recorded with HM Land Registry.
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
12 Tylney Avenue is notably below the street on co₂ emissions.
Price per m²
£5,176
Street avg £5,747
Floor Area
131 m²
Street avg 116 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Dulwich Wood Park / College Road — bus stop.

Daytime· 07:00 – 23:00
55.7dB

Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Demolition of an existing utility at the front of the house and the erection of an extension aligning it with an existing garage. Replacement of all UPVC windows with aluminium replacements, installation of a sky light to the rear, landscaping works and the demolition and erection of a new garden wall.
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23 May 2022Most recent
£678,000
Median price across the last 5 sales in SE19 1LN: £800,000 (2025–2021).

CO₂ Emissions
7.1 t/year
Street avg 4.9 t/year
SE19 1JX
Closest school
0.4 km
Paxton Primary School. 60 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Night-time· 23:00 – 07:00
45.6dB