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18 Harpenden Lane, Redbourn, St Albans, AL3 7PB

6 sales on record1 planning record

Estimated value

£734,000

  • Since the 2025 sale (£675,000)+9%
  • Against AL3 7PB's recent median (£500,000)+47%

Newest record on this page: January 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Semi-detached
Bedrooms
4
Bathrooms
2
Floor area
100 m²
1076 sq ft
Energy rating
C
Score 70
Council tax
Band D
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£734,000

  • Against its 2025 sale (£675,000)+9%
  • Against AL3 7PB's recent median (£500,000)+47%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 18 Harpenden Lane is modelled from its 100 m² EPC floor area, its 6 recorded sales and recent sales of comparable homes in AL3 7PB. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    100 m² from the EPC lodged in September 2024

  • Sales of this home

    6 sales recorded, the latest in 2025

  • Recent sales in AL3 7PB

    5 sales, median £500,000 (2026–2021)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: January 2026Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
Planning1 applicationFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

Price for 18 Harpenden Lane has grown more than fourfold since the 1997 starting point.

Sales timeline

  1. 28 February 2025Most recent

    £675,000

    +42.1%over 5 years

  2. 18 August 2019

    £475,000

    +41.8%over 8 years

  3. 2 June 2011

    £335,000

    +48.9%over 8 years

  4. 3 January 2003

    £225,000

    +66.7%over 3 years

  5. 15 July 1999

    £135,000

    +25.0%over 2 years

  6. 5 June 1997

    £108,000

Median price across the last 5 sales in AL3 7PB: £500,000 (2026–2021).

Risks

What this page doesn't show

Nothing is flagged from the data on this page, but these checks are only run in the report. The detail, evidence and what to ask about it are in the Risks Report.
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

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Overview

About 18 Harpenden Lane

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

18 Harpenden Lane is a four-bedroom semi-detached house in Redbourn, St. Albans, St Albans (AL3 7PB). It has a recorded floor area of 100 m² (around 1076 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (September 2024) shows a C (score 70). When first surveyed in November 2010 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Average to Good, hot-water efficiency went from Average to Good and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Very Poor. The recommended improvements would push it to B (score 81). Other recorded features include a self-contained annexe. Records show the property has been extended at some point in its history.

Most recent transfer was February 2025 at £675,000 — fresh data. At 100 m² it's 20.9% larger than the typical home in the postcode (83 m² median across 21 EPCs). Its energy rating outperforms most of the postcode (better than 81% of similar EPCs). Across 1997–2025, sale prices on this property compounded at 6.8% per year. On a £-per-square-foot basis, the last sale (£627/sq ft) was about 95.9% above the typical sold price in the postcode. One historical planning record sits against the property in 2019.

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

  • Bedrooms4
  • Bathrooms2
  • Open-plan layoutYes
  • Dining roomYes
  • Utility roomYes
  • CloakroomYes
  • EnsuiteYes

Outside

  • Private gardenYes
  • ParkingOff street

Building

  • Previously extendedYes
  • RefurbishedYes
Before you decide

Everything you need to know about 18 Harpenden Lane

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

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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)
Sept 2024

EPC Rating

A
B
C
C70
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
3.5 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 24 September 2034

7 years remaining

Property Improvements

Changes detected from historical EPC data

Sept 2024from Nov 2010
EPC improved fromE41toC70
Heating Controls
Prog + StatFull

Heating controls upgraded for better temperature management

Hot Water
AverageGood

Hot water efficiency improved

Windows
AverageGood

Window efficiency improved

Low Energy Lighting
8%84%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 18 Harpenden Lane, Redbourn, St Albans, AL3 7PB, sourced from the PlanIt planning register.

1 application on record at 18 Harpenden Lane, Redbourn, St Albans, AL3 7PB

1decisions1extensions11documents
  1. Nov 2019
    PorchFull
    Outcome in report

    Extension: Single storey

    Single story side extension with canopy porch and pitch roof, two rooflights, alteration to openings and timber pergola to rear

    Extension
    Documents
    11 docs on file
    Reference
    5/2019/2465
    Full record in report

Unlock 18 Harpenden Lane, Redbourn, St Albans, AL3 7PB's full planning history

You're seeing the shape of it. The report has the substance.

  • Every decision — granted, refused or withdrawn (1 on record)
  • All 1 application on this property in full
  • The 11 documents, officer reports & conditions
  • What the pattern means for extending or converting here
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On the street

Versus other Harpenden Lane homes

Four headline reads against 21 similar houses on this street, drawn from the latest EPC and Land Registry data.

On epc rating, 18 Harpenden Lane stands well clear of the street.

Price per m²

£6,750

Street avg £5,368

Strongly above

Floor Area

100 m²

Street avg 92 m²

Above

Habitable Rooms

5 rooms

Street avg 5 rooms

Above

CO₂ Emissions

3.5 t/year

Street avg 5.3 t/year

Strongly above
Area

The neighbourhood at a glance

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

Crime

170/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Ver Road — bus stop.

Closest school

0.7 km

Redbourn Primary School. 5 schools nearby.

Nearest schools

  • Redbourn Primary SchoolPrimary734m
  • Roundwood Park SchoolSecondary2.5km
  • Roundwood Primary SchoolPrimary2.5km
  • Wood End SchoolPrimary2.9km

Nearest stops

  • Ver RoadBus stop110m
  • Lamb LaneBus stop272m
  • Harpenden LaneBus stop292m
  • High StreetBus stop399m

Most reported crime locally

  • Violence & Sexual Offences776 reports30%
  • Anti-social Behaviour568 reports22%
  • Shoplifting208 reports8%
  • Other Theft193 reports8%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Early 20th centurySemi-Detached HouseEPC CExtended multiple times (2+ extensions)Solid (non-cavity) walls

Because the property has been extended more than once and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.

From £1,220 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£740k

1 Appletree Grove, Cumberland Drive, Redbourn

AL3 7PG

4 bed
£693k

1 Bassett Close, Redbourn

AL3 7JY

4 bed
£796k

1 Draper Court, Peartree House, Crown Street, Redbourn

AL3 7HN

4 bed2 bath
£811k

1 Coopers Meadow, Redbourn

AL3 7EY

4 bed3 bath
£830k

1 Flint Copse, Crown Street, Redbourn

AL3 7QE

4 bed2 bath
£873k

1 Brooke End, Redbourn

AL3 7GA

4 bed
£652k

1 Fish Street Farm, High Street, Redbourn

AL3 7NS

3 bed1 bath
£602k

1 Crown Cottages, St Albans Road, Redbourn

AL3 7LH

3 bed

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 18 Harpenden Lane is modelled from its 100 m² EPC floor area, its 6 recorded sales and recent sales of comparable homes in AL3 7PB. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 6 sales are recorded for 18 Harpenden Lane. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 18 Harpenden Lane was lodged in September 2024 at band C and is valid until September 2034. 2 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. 1 application is matched to 18 Harpenden Lane. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 15 months, which places each incident at an approximate point. The 5 schools and 30 stops listed are measured in a straight line from AL3 7PB, not by walking route.
Council tax band
18 Harpenden Lane is in council tax band D. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 18 Harpenden Lane, Redbourn, St Albans, AL3 7PB. Each answer is also embedded as structured data for search engines.

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