The population is shrinking, while it grows in Heemskerk. Homes cost less than the average in the municipality of Heemskerk, and registered crime per resident is higher.
1,980 residents,
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Compared with the municipality of Heemskerk · newest year available
© Kadaster / PDOK, CBS
The average WOZ value in Oosterzij is €318,000, 23% lower than in Heemskerk (€412,000). Between 2021 and 2025 the average WOZ value rose 52%, against a rise of 34% in Heemskerk. 29% of the homes are owner-occupied, 31 percentage points less than in Heemskerk (60%).
The average WOZ value rose 52% between 2021 and 2025, to €318,000.
The WOZ value as struck on 1 January of the year before the KWB edition.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
Modelled ownership costs for a typical dwelling here: ~€245 per month (excluding mortgage and energy)
Typical home here, before mortgage and energy
Model estimates, not bills.
For this home, Heemskerk's OZB, sewage and waste levies rank 231st of 334 gemeenten, cheapest first.
Water board, maintenance and insurance are estimated from national rates and the home's value and size, so they aren't compared.
Source: Municipal levies + CBS 2026
Oosterzij has the 2nd-lowest WOZ value of the 4 buurten in Poelenburg en Oosterzij.
Average WOZ value from the Netherlands down to this area, and its rank within its own group (e.g. buurten within the same wijk). Provincie is omitted: KWB publishes no province rows to average.
Source: CBS Kerncijfers wijken en buurten (KWB)
Here: €318,000 average WOZ value.
| Value | Dwellings | Aged 65+ | |
|---|---|---|---|
| Oosterzij | 318,000 | 912 | – |
| Poelenburg | 312,000 | 823 | – |
| Neksloot | 380,000 | 596 | – |
| Steenstrapark | 434,000 | 124 | – |
Each circle is an area: position by average WOZ value, size by dwelling count. The 65-and-over share (pct_65_plus) travels on every point but is not yet drawn as a second axis.
Source: CBS Kerncijfers wijken en buurten (KWB)
The largest category is social housing, at 68% of dwellings.
CBS publishes this as a share of the dwelling stock, not a count.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
54% of the dwelling stock is single-family homes.
CBS publishes this as a share of the dwelling stock, not a count.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
92% of dwellings were built between 1945 and 1964, against 20% in the municipality of Heemskerk.
Based on 914 dwellings with a registered construction year in the BAG (verblijfsobjecten whose pand has no usable bouwjaar, such as 1005 or 9999, are excluded).
Source: Kadaster BAG (bag-light.gpkg) 2026-09-01
In 2025, 33 crimes per 1,000 residents were registered in Oosterzij, 10% higher than in Heemskerk (30). Since 2021 the registered rate per 1,000 residents rose 30%, against a fall of 11% in Heemskerk. Crimes are counted where they happen, not where the offender lives.
In 2025, Oosterzij registered 33 crimes per 1,000 residents, against 30 in the municipality of Heemskerk.
Crime is counted where it happens and divided by the number of residents, so places with many visitors — city centres, nightlife, stations — score higher.
Source: CBS/Politie geregistreerde misdrijven (47018NED) 2025
In 2025, Oosterzij registered 33 crimes per 1,000 residents, against 30 in the municipality of Heemskerk.
Registered crime, not all crime — CBS/Politie 47018NED. A year without a matching population figure (KWB) is left out.
Source: CBS/Politie geregistreerde misdrijven (47018NED) 2025
The largest category in Oosterzij is 'Violence and threats': 7.6 per 1,000 residents in 2025, against 2.9 in the municipality of Heemskerk.
Four categories are structurally withheld at buurt level (sex offences, child pornography, child prostitution, other integrity offences); the gap with the published total is shown under 'other'.
Source: CBS/Politie geregistreerde misdrijven (47018NED) 2025
Home burglary 2023-2025: 3.7 per 1,000 dwellings a year on average, against 3.1 in the municipality of Heemskerk.
Averaged over 3 years (2023-2025) to dampen year-to-year noise at low counts.
Source: CBS/Politie geregistreerde misdrijven (47018NED) 2025
In 2024, police in Oosterzij registered 2 traffic accidents, of which 0 with injury and none fatal.
Registered accidents (BRON, Rijkswaterstaat); material-damage-only accidents have not been systematically registered since roughly 2010 and are not comparable between areas. This area shows only accidents with an exactly known location (roughly 80-85% of all registered accidents); the rest is known only at street, intersection or gemeente level. The comparison with the gemeente therefore also uses only the gemeente's exactly-located accidents, which is why that figure is lower than on the gemeente's own page.
Source: BRON — Bestand geRegistreerde Ongevallen Nederland (Rijkswaterstaat) 2024
An estimated 62% of adults in Oosterzij rate their own health as good, 11 percentage points less than in Heemskerk. More adults feel lonely (60% against 46%), more report anxiety or depression (58% against 46%), more smoke (23% against 15%) and more are overweight (59% against 54%). Built-up land is the largest land use in Oosterzij, covering 100% of the area, against 20% in Heemskerk.
An estimated 62% of adults rate their own health as good, against 73% in the municipality of Heemskerk (2024).
An RIVM model estimate (small-area estimation from the 2024 Health Monitor for Adults and Elderly), not a direct tabulation — even a buurt that was not itself surveyed gets an estimate. Figures cover adults aged 18 and over.
Source: RIVM/CBS Gezondheidsmonitor Volwassenen en Ouderen (kleine-gebieden-schatting) 2024
0% of the area is green (parks, sport, nature), against 44% in the municipality of Heemskerk.
Every share is calculated as a percentage of the TOTAL area (land and water together, peiljaar 2022); water is therefore one of the slices itself, not a separate whole. Green is the sum of recreational terrain (parks, sport fields, allotments, day recreation) and natural terrain (forest, open natural terrain) — agricultural land is not counted as green here.
Source: CBS Bodemgebruik (86211NED) 2022
A primary school lies here at an average road distance of 200 m.
| Distance | Value | |
|---|---|---|
| Large supermarket | 700 m | – |
| GP practice | 400 m | – |
| Primary school | 200 m | – |
| Daycare | 200 m | – |
| Large supermarkets | – | 3.4 |
| GP practices | – | 4.4 |
| Daycares | – | 4.1 |
Average road distance from every address in this buurt to the nearest amenity, and the average count within 1 km — a buurt average, not a distance from one address.
Source: CBS proximity statistics 2025
Oosterzij has 1,980 inhabitants (2026), or 9,971 per km² (6.9 times as high as in Heemskerk). Between 2021 and 2026 the population stayed about level, against a rise of 1% in Heemskerk. In the 2025 House of Representatives (Tweede Kamer) election, turnout in the municipality of Heemskerk was 79%, 1 percentage point above the national 78%. Of the parties that are largest nationally, D66 had the highest share there: 18% of the vote, against 17% nationally. Election results exist only per municipality, so these are the municipality's figures.
The population held steady between 2021 and 2026, at 1,980.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
With 9,971 residents per km², this buurt is 6.9 times as densely populated as the municipality of Heemskerk.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
In 2025, 10.1 children were born per 1,000 residents; 10.1 died per 1,000.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
28% of residents are between 25 and 45.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
58% of residents are never married.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
52% of residents have Dutch origin.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
56% of residents have a havo, vwo or mbo2-4 level education.
Source: CBS Kerncijfers wijken en buurten (KWB) 2024
These figures are for the whole municipality of Heemskerk; there is no result per buurt or wijk. At the general election (Tweede Kamer) of 29 October 2025, 79% of eligible voters in Heemskerk voted. The largest party was D66 with 18% of the valid votes.
Official election result (Kiesraad), top 8 parties by national vote count plus 'Other'; share of valid votes. A voter may vote at any polling station in their own gemeente; there is therefore no reliable buurt- or wijk-level result. This figure is the whole gemeente's own result.
Source: Kiesraad — Verkiezingsuitslag Tweede Kamer (data.overheid.nl) TK2025
Oosterzij has an average of 0.9 cars per household, 18% lower than in Heemskerk (1.1). 12% of cars run on something other than petrol (diesel, LPG or electricity, hybrids included), 9 percentage points less than in Heemskerk (21%).
Nijverheid en energie is the largest sector, with 40 establishments.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
12% of passenger cars do not run on petrol (diesel, LPG, electric etc.), against 21% in the municipality of Heemskerk (2025).
CBS splits passenger cars into 'petrol' and 'other fuel' only. That second category bundles diesel, LPG, electric (including hybrid), hydrogen, alcohol, LNG and CNG together — CBS publishes no separate electric-car count per buurt, wijk or gemeente, so this is not the same as an 'electric share'.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
The share of passenger cars not running on petrol went from 10% to 12% between 2021 and 2025.
See the 'Passenger cars by fuel type' card for what 'other fuel' covers — this is not the share of electric cars.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
In 2025, 805 passenger cars and 55 motorcycles were registered here.
At this level CBS publishes only passenger cars and motorcycles, no vans or trucks.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
94% of addresses are residential; the largest other use is retail (1%).
Based on 976 verblijfsobjecten in use. An object with several registered uses (e.g. a flat above a shop) is counted under each of them, so the shares can add up to more than 100%.
Source: Kadaster BAG (bag-light.gpkg) 2026-09-01
9,971 residents per km²: 18 times as densely populated as the Dutch average.
The 5 characteristics that differ most from the national average, ranked by log ratio (so a halving and a doubling count as equally different); the shown percentage is the ordinary difference against the Netherlands.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
| Steenstrapark | 260 | €434,000 | 52 |
| Neksloot | 1,335 | €380,000 | 27 |
| Poelenburg | 1,435 | €312,000 | 38 |