When did Flat B, 23 Belsize Square, NW3 4HU last change hands?

Flat B, 23 Belsize Square, NW3 4HU last sold for £645,000 in June 2020, around 6 years ago. Before that, it sold for £480,000 in September 2009, so prices have been rising over 11 years on record. Source: HM Land Registry.

Has Flat B, 23 Belsize Square, NW3 4HU appreciated in value?

Across 2 sales between September 2009 and June 2020, Flat B, 23 Belsize Square, NW3 4HU rose from £480,000 to £645,000, a change of £165,000. That works out to roughly +2.8% per year compounded over 11 years. Source: HM Land Registry.

What planning history does Flat B, 23 Belsize Square, NW3 4HU have?

The most recent planning decision at Flat B, 23 Belsize Square, NW3 4HU was a refusal for rear extension (ref. 2021/3387/P) in July 2021. Source: PlanIt planning register.

Which area is Flat B, 23 Belsize Square, NW3 4HU in?

Flat B, 23 Belsize Square, NW3 4HU sits in London. It falls within the NW3 postcode district.

What is crime like near Flat B, 23 Belsize Square, NW3 4HU?

Police records around Flat B, 23 Belsize Square, NW3 4HU show an average of 6 reported crimes per month over the last 14 months. Violent crime makes up roughly 25% of reports, the most common category. The overall trend is rising (336% versus the prior period). Source: Police UK.

What schools are near Flat B, 23 Belsize Square, NW3 4HU?

The closest primary school to Flat B, 23 Belsize Square, NW3 4HU is Holy Trinity CofE Primary School, NW3 (577m), one of 54 primaries within walking distance. The closest secondary is The UCL Academy (631m), with 17 secondaries in the surrounding area.

What is the nearest station to Flat B, 23 Belsize Square, NW3 4HU?

The closest bus stop to Flat B, 23 Belsize Square, NW3 4HU is Belsize Square, 194m away. The nearest underground option is Belsize Park Underground Station, 489m away.

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Flat B, 23 Belsize Square, London, NW3 4HU

1 planning record

We're still gathering data on this property. Claim it to add details and complete this page.

Overview

About Flat B

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

Flat B is a property in London (NW3 4HU).

One planning record on file: an extension refused in 2021. Across 2009–2020, sale prices on this property compounded at 2.8% per year. Last sale on file: £645,000 in June 2020.

Before you offer

Know exactly what you're buying at Flat B

Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.

Already flagged here

Larger development activity nearby

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Valuation

against the asking price

Risks

planning & flood

Sold prices

similar homes nearby

Trends

the local market

Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

No EPC on record

This property doesn't have an Energy Performance Certificate yet. An EPC is required to sell or let — and unlocks our automated valuation.

Planning

Planning history

Applications and permits filed against Flat B, 23 Belsize Square, London, NW3 4HU, sourced from the PlanIt planning register.

A recent planning application at Flat B was refused — worth checking the council file.

Jul 2021
ExtensionFull
In report
Extension: Rear of property
Replacement of existing front and rear dormers, creation of a rear roof terrace, including formation of a decking area on the roof of the bay extension at the rear and installation of metal railings all in association with the top floor flat.
Documents
7 docs on file
Reference
2021/3387/P
View planning record

Before you offer

We flagged 1 thing worth checking at Flat B

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.

Larger development activity nearby

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Price

Sales history & valuation

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

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

Last sold (2020)

£645,000

Growth on file: 2.8% per year over 11 years.

Sales timeline

17 June 2020Most recent
£645,000
+34.4%over 10 years
24 September 2009
£480,000

Median price across the last 5 sales in NW3 4HU: £870,000 (2024–2019).

Nearby sales in NW3 4HU

Before you offer

Everything we know about Flat B, in one report

What it's really worth, what could be wrong, and the planning, sales and area data in full.

What we flagged

Larger development activity nearby

£14.99

Trusted by UK homebuyers

Comparables

Similar properties nearby

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

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15a, Flat A, Eton Road, Camden

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£594k

12a, Flat 1, Belsize Park

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£591k

25a, Flat 1, Elizabeth Mews

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£832k

23a, Garden Flat, Belsize Square, Camden

NW3 4HU

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£559k

25a, Flat 2, Elizabeth Mews

NW3 4UH

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£1.2m

15a, Flat C, Eton Road

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Flat

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

Rail-style transport is unusually close for this postcode.

Crime

6/mo

Rising year-on-year across the wider district.

Nearest stop

0.2 km

Belsize Square — bus stop.

Closest school

0.6 km

Holy Trinity CofE Primary School, NW3. 71 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 NW3 4HU from Defra's strategic mapping. The pin marks this postcode's centroid.

Daytime· 07:00 – 23:00

53.9dB

Low

Night-time road noise heatmap for NW3 4HU

Night-time· 23:00 – 07:00

42.9dB

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 Flat B, 23 Belsize Square, London, NW3 4HU. Each answer is also embedded as structured data for search engines.