20 Bertha Street, Ferryhill, DL17 8AZ
About 20 Bertha Street
20 Bertha Street is a mid-terrace house in Ferryhill (DL17 8AZ). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (December 2024) shows a G (score 18), near the bottom of the EPC scale. Earlier certificates rated it D (March 2023); the latest reading is 3 bands lower. Between certificates, roof efficiency went from Very Poor to Average; while wall efficiency dropped from Average to Very Poor and hot-water efficiency dropped from Good to Very Poor. The recommended improvements would lift it to B (score 86), a 5-band jump. Main heating runs on to be used only when there is no heating/hot.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2000–2024, sale prices on this property compounded at 3.2% per year. Today's modelled estimate of £118,000 sits 136% above the 2024 sale of £50,000. On a £-per-square-foot basis, the last sale (£65/sq ft) was about 53.7% above the typical sold price in the postcode. Last sale on file: £50,000 in June 2024.
Know exactly what you're buying at 20 Bertha Street
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
20 Bertha Street sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Changed to a more efficient fuel source
Hot water system changed
Roof insulation improved
Low energy lighting percentage decreased
Planning history
20 Bertha Street has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
We flagged 1 thing worth checking at 20 Bertha Street
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
20 Bertha Street has more than doubled in price since the earliest registered sale in 2000.
£118,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.2% per year over 23 years.
£50,000
Growth on file: 3.2% per year over 23 years.
Sales timeline
16 June 2024Most recent
£50,000
-21.9%over 18 years13 October 2005
£64,000
+166.7%over 4 years21 December 2000
£24,000
Median price across the last 5 sales in DL17 8AZ: £40,500 (2025–2024).
Nearby sales in DL17 8AZ
Everything we know about 20 Bertha Street, 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 Bertha Street homes
EPC Rating for 20 Bertha Street lags the street by a wide margin.
Price per m²
£694
Street avg £688
Floor Area
72 m²
Street avg 74 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
7.8 t/year
Street avg 4.0 t/year
Similar properties nearby
The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Rutherford Terrace — bus stop.
Closest school
0.4 km
Broom Cottages Primary & Nursery 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
47.6dB
Night-time· 23:00 – 07:00
37.4dB