neighbourhood in Katwijk
't Duyfrak
2,515 residents · postal code 2235 · Part of Valkenburg, Katwijk
Safe, but not spacious
Almost every home in 't Duyfrak was built after 2000, and that shows up in figures that do not usually appear together. Wealth & income stands at 9.6 and safety at 9.8, with all four offence types below the national median. At the same time quiet & nature is stuck at 3.9: there is barely any tree canopy yet, a fraction of what is usual nationally, and the greenery around it lags too.
The primary school is more than a kilometre away, further than in most neighbourhoods, and still 't Duyfrak reaches 8.4 for families. That comes from the residents themselves: almost six in ten households have children and the share of young children is well above the national middle. The distance to school costs points; the household profile more than makes up for them.
- no. 405 of 13,075 neighbourhoods with a grade
- no. 2 of 37 in Katwijk
How 't Duyfrak scores
Do some of these matter more to you than others?
Is 't Duyfrak a safe neighbourhood?
For 2025, 't Duyfrak comes out at 14 recorded crimes per 1,000 people present; the national middle is 24. That is low: 't Duyfrak is among the 20% of Dutch neighbourhoods with the fewest recorded crimes.
The figures ⌄Safety
Registered crimes per 1,000 people present per year: residents plus business activity. Figures for small neighbourhoods are smoothed.
In 2025, 37 crimes were recorded here. The figures above are per 1,000 people present (residents + businesses).
Tick = Dutch median
The safest neighbourhoods in Katwijk →The most dangerous neighbourhoods in Katwijk →
The figures ⌄Amenities
Average distance to everyday amenities, compared with the Dutch median.
Tick = Dutch median
The figures ⌄Wealth & income
What the homes are worth, what residents earn and how many homes stand empty. It describes the area, not the people living in it.
Not counted
Part of this score's subject, but not part of the grade.
Tick = Dutch median
The figures ⌄Quiet & nature
How tightly the addresses sit together, how much noise there is, and how much green, trees and water surround it.
Not counted
Part of this score's subject, but not part of the grade.
Not part of the grade: air quality varies mostly between regions, barely between neighbourhoods within one municipality. WHO guideline: 5 µg/m³. Calculated annual mean, RIVM 2024.
Tick = Dutch median
The figures ⌄Families
How practical this area is with children: distance to school and childcare, and how many children already live here.
Tick = Dutch median
Who lives here
't Duyfrak has strikingly many children under 15: 28%, against 14% in the average Dutch neighbourhood.
Age profile
- 0–1528%
NL median 14%
- 15–2510%
NL median 11%
- 25–4528%
NL median 22%
- 45–6525%
NL median 28%
- 65+9%
NL median 22%
Share of residents per age group (CBS, 2025). All five bars share one scale, so their lengths can be compared with each other.
Average household size
3.0 — far larger than average
NL median 2.3
Single-person households
17% — far fewer than average
NL median 31%
Households with children
59% — far more than average
NL median 35%
Residents per km²
5,297 — far more densely populated than average
NL median 2,364
Tick = Dutch median. Households with children counts towards Families, population density towards Quiet & nature; the other figures here get no grade.
Frequently asked questions
Is 't Duyfrak a safe neighbourhood?
For 2025, 't Duyfrak comes out at 14 recorded crimes per 1,000 people present; the national middle is 24. That is low: 't Duyfrak is among the 20% of Dutch neighbourhoods with the fewest recorded crimes. The figure is about what the police record, not about the people who live there.
How much crime is there in 't Duyfrak?
In 't Duyfrak the police recorded 37 crimes in 2025: theft, burglary, violence and vandalism combined. The comparison figure above (14 per 1,000) is not simply that count divided by the number of residents: we count residents plus workplaces, so a shopping street or station is not unfairly penalised, and for small counts we pull the figure towards the national average — otherwise a single incident would make a small neighbourhood look unsafe.
How is the grade for 't Duyfrak calculated?
't Duyfrak scores 9.8 as its total score. That grade is a national position: we weigh five equally heavy scores — safety, amenities, wealth & income, quiet & nature and families — and see where 't Duyfrak lands among every neighbourhood in the Netherlands. So it is not the mean of the five grades, but a place in the queue. All from open data published by CBS and the police.
The best and worst neighbourhoods of Katwijk
Same total grade, same yardstick — from the top to the bottom of Katwijk.
Highest grades
Lowest grades
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