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21 Harmsworth Way, Barnet, London, N20 8JT

12 planning records
Property type
Detached
Bedrooms
5
Floor area
370 m²
3983 sq ft
Energy rating
C
Score 72
Council tax
Band H
Tenure
Owner Occupied
Overview

About 21 Harmsworth Way

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

21 Harmsworth Way is a five-bedroom detached house in Barnet, London, London (N20 8JT). It has a recorded floor area of 370 m² (around 3983 sq ft), construction records dating it to 1950-1966 and council tax band H. The latest certificate (March 2025) shows a C (score 72). When first surveyed in May 2010 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Poor to Good, hot-water efficiency went from Average to Good and lighting went from Average to Very Good. The recommended improvements would push it to B (score 81).

Held since November 2010 — that's 16 years off the open market, well above the local norm. Today's modelled estimate of £2,971,000 sits 324.4% above the 2010 sale of £700,000. On a £-per-square-foot basis, the last sale (£176/sq ft) was about 73.7% below the postcode norm. 12 planning records sit against the property, 3 approved, 3 refused. Past consents include an extension, a porch and a loft conversion, meaningful when judging how the property has evolved. At 370 m² it's 26.7% larger than the typical home in the postcode (292 m² median across 8 EPCs).

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

  • Bedrooms5
Before you decide

Everything you need to know about 21 Harmsworth Way

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

£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.

21 Harmsworth Way's carbon output runs well above what efficient homes in the postcode produce.

Current Certificate(1 of 2)
Mar 2025

EPC Rating

A
B
C
C72
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
10.0 t/year
Occupancy
Owner Occupied

Property Improvements

Changes detected from historical EPC data

Mar 2025from May 2010
EPC improved fromE47toC72
Heating Controls
Prog + StatFull Control

Heating controls upgraded for better temperature management

Hot Water
AverageGood

Hot water efficiency improved

Windows
Mostly DoubleFull Double

Windows upgraded, improving insulation

Roof Insulation
InsulatedWell Insulated

Loft insulation upgraded to recommended levels

Low Energy Lighting
30%100%

More low energy lighting installed

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Mid 20th centuryDetached HouseEPC CDetached over 300m²Extended multiple times (2+ extensions)

Because the property is a large detached home over 300m² and has been extended more than once, we believe a Level 3 building survey should be considered.

From £2,095 · Includes VAT

Planning

Planning history

Applications and permits filed against 21 Harmsworth Way, Barnet, London, N20 8JT, sourced from the PlanIt planning register.

Planning history includes both a loft conversion and an extension — the classic family-home expansion.

  1. Jan 2023
    Tree WorksTrees
    In report

    1 x Mature Weeping Willow (applicants ref. T1) - Previously maintained at around 7 meters, reduce tree back to previous points.

    Agent
    JJL Trees Ltd
    Documents
    3 docs on file
    Reference
    TCP/0667/22
    View planning record
  2. Mar 2017
    ExtensionAmendment
    In report

    Non material amendment to planning permission 16/0794/HSE dated 14/10/16 for `Addition of 1no skylight to existing ground floor rear extension, first floor rear extension; roof extension involving hip to gable, rear and side dormer windows, 5no rooflights to front and side elevations to facilitate a loft conversion.` Amendment to include replacement of the approved glass roof panel with a lantern type rooflight

    Agent
    Studio 136 Architects Ltd
    Documents
    6 docs on file
    Reference
    17/0912/NMA
    View planning record

What's in 21 Harmsworth Way, Barnet, London, N20 8JT's planning history?

10 more on this property, plus refusals, disputes and full decisions nearby, in the report.

Price

Sales history & valuation

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

21 Harmsworth Way's modelled value sits at over four times its earliest registered sale price (2010).

Current estimate

£2,971,000

Modelled from EPC, postcode comparables.

See how we calculated this
Last sold (2010)

£700,000

Recorded with HM Land Registry.

Sales timeline

  1. 2 November 2010Most recent

    £700,000

Median price across the last 5 sales in N20 8JT: £2,100,000 (2023–2014).

On the street

Versus other Harmsworth Way homes

Four headline reads against 8 similar houses on this street, drawn from the latest EPC and Land Registry data.

Price per m² for 21 Harmsworth Way lags the street by a wide margin.

Price per m²

£1,892

Street avg £7,831

Strongly below

Floor Area

370 m²

Street avg 299 m²

Strongly above

Habitable Rooms

10 rooms

Street avg 8 rooms

Strongly above

CO₂ Emissions

10.0 t/year

Street avg 7.6 t/year

Strongly below
Before you decide

Everything you need to know about 21 Harmsworth Way

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

£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.
£2.3m

1 Grange Avenue, Barnet

N20 8AA

5 bed
£3.3m

1 Totteridge Village, Barnet

N20 8NX

6 bed5 bath
£3.5m

1 The Pastures, Barnet

N20 8AN

6 bed5 bath
£1.1m

1 Lynton Mead, Barnet

N20 8DG

5 bed
£4.7m

1 Hadar Close, Barnet

N20 8TL

6 bed7 bath
£1.6m

1 Ventnor Drive, Barnet

N20 8BT

4 bed3 bath
£1.5m

1 Greenway, Barnet

N20 8EE

4 bed2 bath
£1.4m

1 West Hill Way, Barnet

N20 8QX

6 bed3 bath
Area

The neighbourhood at a glance

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

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

0.1 km

Totteridge Green — bus stop.

Closest school

0.2 km

St Andrew's CofE Voluntary Aided Primary School, Totteridge. 35 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 N20 8JT from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for N20 8JT

Daytime· 07:00 – 23:00

46.7dB

Low
Night-time road noise heatmap for N20 8JT

Night-time· 23:00 – 07:00

39.3dB

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 21 Harmsworth Way, Barnet, London, N20 8JT. Each answer is also embedded as structured data for search engines.