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't Duyfrak

't Duyfrak is a neighbourhood in the Valkenburg district of Katwijk, with 2,515 residents and 785 homes. 69% of homes are owner-occupied and 76% are single-family houses. The average WOZ value (€657,000) is 42% above the municipal average. From a typical postcode here, 92 everyday services are within a 15-minute walk.

Neighbourhood 05370802 · 34 postcodes · Updated 24 October 2026
2,515residents1 January 2025
€657,000average WOZ home valueKatwijk: €462,000
17%green within 500 mKatwijk: 19%
92services within 15 minutesmedian postcode
't Duyfrak in KatwijkPostcodes in 't Duyfrak highlighted; the rest of Katwijk in grey
Map of Katwijk with 't Duyfrak highlighted

Who lives here.

2,515 residents in 845 households, 3.0 people per household on average; next to the figure for Katwijk.

28%
aged 0–14
11%
aged 15–24
28%
aged 25–44
9%
aged 65 and over
17%
one-person households
59%
households with children

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

Homes.

The average WOZ value of a home in 't Duyfrak is €657,000, against €462,000 in Katwijk.

785homes1 January 2025
76%single-family houses24% flats and apartments
69%owner-occupied17% housing association
44%built in the last ten years1% unoccupied
730 m³gas per home per yearKatwijk: 770 m³
3,050 kWhelectricity per home per yearKatwijk: 2,550 kWh
2%homes off the gas gridKatwijk: 5%
57%homes with solar panelsKatwijk: 33%

The WOZ value is the official valuation each Dutch municipality sets every year for property tax. It is not a sale price. The averages here use the valuation date of 1 January 2024.

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

Income and work.

How households in 't Duyfrak compare with the national income distribution (reporting year 2024).

13%of households in the lowest 40% nationallyKatwijk: 32%
46%in the top 20% nationallyKatwijk: 24%
1.0%of residents live below the poverty lineKatwijk: 1.5%
€434,000median household wealthKatwijk: €259,000
84.0%of 15 to 75-year-olds in workKatwijk: 77.0%
46%with a university or higher professional degreeKatwijk: 23%
16.0%of workers are self-employedKatwijk: 13.0%
1.1cars per householdKatwijk: 0.9

Statistics Netherlands ranks every household in the country by income. In a neighbourhood that matched the national mix exactly, 40% of households would fall in the lowest 40% nationally and 20% in the top 20%. Income on its own says nothing about what a place is like to live in.

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2024: income, work and education (CC BY 4.0)

Safety.

Police registered 37 crimes in 't Duyfrak in 2025, 10% fewer than in 2024. That is 14.7 per 1,000 residents, compared with 30.5 across Katwijk.

Vandalism and criminal damage6
Theft of bicycles and mopeds4
Other property crime4
Theft from vehicles1
Threats1
Assault1
Driving under the influence1

Registered crime shows what becomes known to the police, not how safe a place feels, and not every crime is reported. Town centres, shopping areas and the streets around stations have few residents but many visitors, which pushes the rate per 1,000 residents up. The categories above are a selection; the total includes every registered crime.

Source: Dutch Police, registered crime by district and neighbourhood, 2024–2025 (CC BY 4.0)

Everyday distances.

Average distance by road for everyone living in 't Duyfrak, a moderately urban area.

Distance to

GP practice0.9 km
Large supermarket0.7 km
Day nursery0.4 km
Primary school1.4 km

Also

Primary schools within 3 km3.4
Primary pupils living here410
Secondary pupils living here240
Business premises310
Residents per km²5,297
Land area48 ha

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

Nearby neighbourhoods.

The closest neighbourhoods in Katwijk.

Overige verspreide huizen ValkenburgDorpFrederiksoord-ZuidFrederiksoord-Noord't JoghtValkenburgse MeerValkenburg district