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Get started21a, Derby Avenue, Harrow, HA3 5JU
3 sales on record
About 21a
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21a is a two-bedroom semi-detached house in Harrow (HA3 5JU). It has a recorded floor area of 56 m² (around 603 sq ft) and construction records dating it to 1930-1949. The latest certificate (May 2021) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (October 2009); the latest reading is one band lower. Between certificates, roof efficiency dropped from Very Good to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 73).
Sale prices here have outpaced Harrow HPI: 5.2% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£581/sq ft) was about 111.9% above the typical sold price in the postcode. Most recent transfer: September 2022 at £350,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
What this property has
Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.
Inside
- Bedrooms2
- Dining roomYes
Outside
- Private gardenrear
Building
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Current Certificate(1 of 2)
May 2021
EPC Rating
A
B
C
D
D68
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
2.4 t/year
Occupancy
Owner Occupied
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
21a has more than doubled in price since the earliest registered sale in 2007.
Current estimate
See how we calculated this£339,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.2% per year over 15 years.
Last sold (2022)
£350,000
Growth on file: 5.2% per year over 15 years.
Sales timeline
Full property reportLaunch offer · 33% off
The complete analysis of 21a, Derby Avenue, Harrow, HA3 5JU
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
Versus other Derby Avenue homes
Four headline reads against 11 similar flats on this street, drawn from the latest EPC and Land Registry data.
Price per m² for 21a runs comfortably ahead of the street norm.
Price per m²
£6,250
Street avg £3,763
Floor Area
56 m²
Street avg 46 m²
Habitable Rooms
3 rooms
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Harrow district page.
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
Stanhope Avenue — bus stop.
Road noise across the postcode
Modelled day and night-time noise levels around HA3 5JU from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
52.3dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 60 points of interest in total.
Common questions
The questions buyers, sellers and homeowners most often ask about 21a, Derby Avenue, Harrow, HA3 5JU. Each answer is also embedded as structured data for search engines.