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About 81a
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
81a is a one-bedroom semi-detached house in Cambridge (CB1 3ST). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (February 2026) shows a C (score 75), near the top of the C band. The rating has held steady at C across 2 certificates since July 2011. Between certificates, roof efficiency dropped from Good to Average and window efficiency dropped from Average to Poor. This certificate was lodged in the last six months, so the rating reflects current condition. At 42 m² this is the 7th smallest of 32 units on EPC record in the building, where floor areas span 39–101 m². The building's EPC ratings span F to B across 32 units on file. Other recorded features include outbuildings.
Sale prices here have outpaced Cambridge HPI: 4.2% per year against 0% for the wider region. Today's modelled estimate of £247,000 is 18.2% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£462/sq ft) was about 44% above the typical sold price in the postcode. At 42 m² it sits well below the postcode median (77 m² across 31 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). Last sale on file: £209,000 in August 2019.
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
- Bedrooms1
- Bathrooms1
- Open-plan layoutYes
Outside
- Private garden
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
81a's carbon output is low for the local stock.
Current Certificate(1 of 2)
Feb 2026
EPC Rating
A
B
C
C75
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Poor
CO2 Emissions
1.3 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.
Current estimate
See how we calculated this£247,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.2% per year over 7 years.
Last sold (2019)
£209,000
Growth on file: 4.2% per year over 7 years.
Sales timeline
Versus other Birdwood Road homes
Four headline reads against 10 similar flats on this street, drawn from the latest EPC and Land Registry data.
On co₂ emissions, 81a stands well clear of the street.
EPC Rating
75 (C)
Street avg 69 (C)
Floor Area
42 m²
Street avg 41 m²
CO₂ Emissions
1.3 t/year
Street avg 1.9 t/year
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 Cambridge district page.
Reported crime in the wider district is trending notably upward year-on-year.
Crime
4/mo
Rising year-on-year across the wider district.
Nearest stop
1.4 km
Road noise across the postcode
Modelled day and night-time noise levels around CB1 3ST from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
48.2dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 26 points of interest in total.
Beautiful places to visit nearby
Curated scenic spots within reach of this postcode, served by Beautifulplaces.ai. Photography and tagging come from their open dataset.
Common questions
The questions buyers, sellers and homeowners most often ask about 81a, Birdwood Road, Cambridge, CB1 3ST. Each answer is also embedded as structured data for search engines.