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21 Roestock Gardens, Colney Heath, St Albans, AL4 0QJ

Extendable1 planning record

Estimated value

£643,000

  • Since the 2020 sale (£495,000)+30%
  • Against AL4 0QJ's recent median (£725,000)-11%

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
3
Bathroom
1
Floor area
82 m²
883 sq ft
Energy rating
D
Score 63
Council tax
Band E
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

£643,000

  • Against its 2020 sale (£495,000)+30%
  • Against AL4 0QJ's recent median (£725,000)-11%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Roestock Gardens is modelled from its 82 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in AL4 0QJ. 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

    82 m² from the EPC lodged in January 2026

  • Sales of this home

    1 sale recorded, the latest in 2020

  • Recent sales in AL4 0QJ

    5 sales, median £725,000 (2025–2023)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: October 2025Latest 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.

The latest sale landed in the post-pandemic price surge — useful context when reading the figure.

Sales timeline

  1. 21 September 2020Most recent

    £495,000

Median price across the last 5 sales in AL4 0QJ: £725,000 (2025–2023).

Risks

What this page doesn't show

1 potential issue has already been flagged for 21 Roestock Gardens, Colney Heath, St Albans, AL4 0QJ. The detail, evidence and what to ask about it are in the Risks Report.
  • Larger development activity nearbyIn 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 21 Roestock Gardens

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

21 Roestock Gardens is a three-bedroom semi-detached house in Colney Heath, St. Albans, St Albans (AL4 0QJ). It has a recorded floor area of 82 m² (around 883 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (January 2026) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in July 2020 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Good to Very Good and lighting went from Good to Very Good. The recommended improvements would push it to C (score 77). This certificate was lodged in the last six months, so the rating reflects current condition. It has already been extended once and our model flags further extension potential, a sign of buyer flexibility.

Today's modelled estimate of £643,000 is 29.9% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£561/sq ft) was about 52.1% above the typical sold price in the postcode. Sold September 2020 for £495,000. One historical planning record sits against the property in 2022.

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

  • Bedrooms3
  • Bathrooms1
  • Dining roomYes

Outside

  • Private gardenYes
  • GarageYes

Building

  • Previously extendedYes
  • Extension potentialPossible
Before you decide

Everything you need to know about 21 Roestock Gardens

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

Larger development activity nearby

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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.

The EPC has just been inspected, so the rating reflects current condition.

Current Certificate(1 of 2)
Jan 2026

EPC Rating

A
B
C
D
D63
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
3.3 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 29 January 2036

9 years remaining

Property Improvements

Changes detected from historical EPC data

Jan 2026from Jul 2020
EPC improved fromE52toD63
Roof
GoodVery Good

Roof insulation improved

Low Energy Lighting
64%100%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 21 Roestock Gardens, Colney Heath, St Albans, AL4 0QJ, sourced from the PlanIt planning register.

Planning history includes recorded demolition works, indicating a major rebuild phase at this address.

1 application on record at 21 Roestock Gardens, Colney Heath, St Albans, AL4 0QJ

1decisions1extensions9documents2nearby
Flagged:Demolition
  1. Feb 2022
    DemolitionFull
    Outcome in report

    Extension: Part single, part two storey · Side and rear of property

    Demolition of existing rear extension and construction of part single, part two storey rear extension and single storey side extension (amended plans)

    Extension
    Documents
    9 docs on file
    Reference
    5/2021/2726
    Full record in report

Unlock 21 Roestock Gardens, Colney Heath, St Albans, AL4 0QJ'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, plus 2 notable nearby
  • The 9 documents, officer reports & conditions
  • What the pattern means for extending or converting here
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On the street

Versus other Roestock Gardens homes

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

CO₂ Emissions for 21 Roestock Gardens runs comfortably ahead of the street norm.

Price per m²

£6,037

Street avg £5,423

Above

Floor Area

82 m²

Street avg 100 m²

Below

Habitable Rooms

5 rooms

Street avg 5 rooms

Below

CO₂ Emissions

3.3 t/year

Street avg 4.7 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

113/mo

Steady year-on-year across the wider district.

Nearest stop

0.3 km

Roestock Lane — bus stop.

Closest school

1.1 km

Colney Heath Junior Mixed Infant and Nursery School. 9 schools nearby.

Nearest schools

  • Colney Heath Junior Mixed Infant and Nursery SchoolPrimary1.1km
  • De Havilland Primary SchoolPrimary1.6km
  • St Mary's Church of England VA Primary School, Welham GreenPrimary1.7km
  • Oak View Primary and Nursery SchoolPrimary2.3km

Nearest stops

  • Roestock LaneBus stop275m
  • Hall GardensBus stop383m
  • Fellowes LaneBus stop506m
  • Roestock LaneBus stop525m

Most reported crime locally

  • Violence & Sexual Offences652 reports36%
  • Anti-social Behaviour358 reports20%
  • Criminal Damage & Arson159 reports9%
  • Vehicle Crime143 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

Victorian-eraSemi-Detached HouseEPC DPre-1919 buildSolid (non-cavity) walls

Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.

From £1,155 · 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.
£675k

1 Chestnut Drive

AL4 0EP

3 bed
£754k

1 Barley Mow Lane

AL4 0RS

3 bed3 bath
£779k

1 Central Drive

AL4 0UU

3 bed1 bath
£516k

1 Bennetts Close, Colney Heath

AL4 0PU

3 bed1 bath
£320k

1 Cedarwood Drive

AL4 0DX

3 bed
£564k

1 Ardens Marsh, Sandpit Lane

AL4 0JE

2 bed1 bath
£849k

1 Boissy Close, Colney Heath Lane

AL4 0UE

4 bed3 bath
£849k

1 Coopers Gate, Colney Heath

AL4 0ND

4 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 21 Roestock Gardens is modelled from its 82 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in AL4 0QJ. 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. 1 sale is recorded for 21 Roestock Gardens. 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 21 Roestock Gardens was lodged in January 2026 at band D and is valid until January 2036. 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 21 Roestock Gardens. 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 16 months, which places each incident at an approximate point. The 9 schools and 30 stops listed are measured in a straight line from AL4 0QJ, not by walking route.
Council tax band
21 Roestock Gardens is in council tax band E. 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 21 Roestock Gardens, Colney Heath, St Albans, AL4 0QJ. Each answer is also embedded as structured data for search engines.

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