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21b, Ash Tree Road, Southampton, SO18 1LY

4 sales on record
Property type
Semi-detached
Floor Ground
Bedrooms
2
Bathroom
1
Floor area
55 m²
592 sq ft
Energy rating
C
Score 69
Council tax
Band B
Tenure
Owner Occupied
Overview

About 21b

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

21b is a two-bedroom semi-detached house in Southampton (SO18 1LY). It has a recorded floor area of 55 m² (around 592 sq ft), construction records dating it to 1967-1975 and council tax band B. At 55 m² this is the 3rd smallest of 25 units on EPC record in the building, where floor areas span 40–158 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (March 2017) shows a C (score 69), just inside the C band. When first surveyed in November 2016 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good and main heating went from Average to Good.

A recent sale: £185,000 in July 2025. At 55 m² it sits well below the postcode median (99 m² across 24 EPCs), making it one of the more compact homes locally. Across 1996–2025, sale prices on this property compounded at 5.5% per year. On a £-per-square-foot basis, the last sale (£312/sq ft) was about 80.1% above the typical sold price in the postcode.

Specifications

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
  • Bathrooms1

Outside

  • Private gardenYes
  • GarageEn bloc

Building

  • Heating systemGas
Before you decide

Everything you need to know about 21b

The true value, the hidden risks and the full sale history, in one report.

Signs of HMO activity in the area
£14.99one-off

30-day money-back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

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)
Mar 2017

EPC Rating

A
B
C
C69
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
1.9 t/year
Occupancy
Owner Occupied

Property Improvements

Changes detected from historical EPC data

Mar 2017from Nov 2016
EPC improved fromD61toC69
Heating System
Storage HeatersGas Boiler

Replaced storage heaters with gas boiler

Main Fuel
ElectricGas

Connected to mains gas supply

Heating Controls
ManualFull

Heating controls upgraded for better temperature management

Hot Water
Immersion (Off-Peak)Main System

Hot water system upgraded

Planning

Planning history

Applications and permits filed against 21b, Ash Tree Road, Southampton, SO18 1LY, sourced from the PlanIt planning register.

21b has no planning applications on record.

Notable planning nearby

5applications of note in the surrounding area

Before you offer

We flagged 1 thing worth checking at 21b

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.

  • Signs of HMO activity in the area
£14.99

30-day money-back guarantee

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

21b has more than quadrupled in price since its earliest registered sale in 1996.

Current estimate

£192,000

Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 29 years.

See how we calculated this
Last sold (2025)

£185,000

Growth on file: 5.5% per year over 29 years.

Sales timeline

  1. 3 July 2025Most recent

    £185,000

    +184.6%over 24 years

  2. 11 April 2001

    £65,000

    +11.1%over 8 months

  3. 30 July 2000

    £58,500

    +51.9%over 4 years

  4. 31 January 1996

    £38,500

Median price across the last 5 sales in SO18 1LY: £270,000 (2023–2021).

On the street

Versus other Ash Tree Road homes

Four headline reads against 3 similar flats on this street, drawn from the latest EPC and Land Registry data.

21b outperforms the street on price per m² by a wide margin.

Price per m²

£3,364

Street avg £2,425

Strongly above

Floor Area

55 m²

Street avg 48 m²

Above

Habitable Rooms

3 rooms

Street avg 2 rooms

Strongly above

CO₂ Emissions

1.9 t/year

Street avg 2.9 t/year

Above
Before you decide

Everything you need to know about 21b

The true value, the hidden risks and the full sale history, in one report.

Signs of HMO activity in the area
£14.99one-off

30-day money-back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£263k

1 Milden Court, 66 Sandringham Road

SO18 1JN

2 bed1 bath
£276k

1 Cobden Rise, St Catherines Road

SO18 1DL

3 bed
£291k

1 Dimond Hill

SO18 1JF

3 bed
£314k

1 Sandringham Road

SO18 1JL

3 bed
£372k

1 Lacon Close

SO18 1JA

3 bed1 bath
£392k

1 Englefield Road

SO18 1AW

3 bed1 bath
£415k

1 Cobden Gardens

SO18 1LN

3 bed1 bath
£425k

1 Hillside Avenue

SO18 1LD

3 bed
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Southampton district page.
Full Southampton report

Reported crime in the wider district is trending notably upward year-on-year.

Crime

6/mo

Rising year-on-year across the wider district.

Nearest stop

0.1 km

Ashtree Road — bus stop.

Closest school

0.3 km

Bitterne Park Primary & Nursery School - Part of the Learning Federation Partnership of Schools. 32 schools nearby.

Go deeper on the local area

The full report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around SO18 1LY from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for SO18 1LY

Daytime· 07:00 – 23:00

50.4dB

Low
Night-time road noise heatmap for SO18 1LY

Night-time· 23:00 – 07:00

41.5dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21b, Ash Tree Road, Southampton, SO18 1LY. Each answer is also embedded as structured data for search engines.