Neighbourhood Slaaghwijk

Neighbourhood in the district of Merenwijkdistrict · municipality Leiden · Zuid-Holland

  • 1.853 homes
  • 4.365 residents
  • avg. year built 1976
  • avg. WOZ value € 304.000

Boundary based on the CBS wijk- en buurtkaart 2024. Zoom in to see individual homes; click a home for details. Open in the homes map

Homes in Slaaghwijk

Homes
1.853
addresses registered for residential use (BAG)
Average year built
1976
Average living area
91 m²
Housing stock (CBS)
1.778
2025

Home type

  • Flat 81% 1.509
  • Mid-terrace house 15% 281
  • End-of-terrace house 3% 62
  • Detached house 0% 1

Energy label

  • A or better 20% 373
  • B 21% 381
  • C 26% 477
  • D 12% 221
  • E 15% 285
  • F 2% 32
  • G 0% 7
  • No label 4% 77

Construction period

  • 1970–1989 94% 1.745
  • 1990–2009 2% 33
  • 2010 onwards 4% 75

Residents

Residents
4.365
1 January 2025
Households
1.900
avg. 2,3 people
Single-person households
41%
Households with children
39%
Population density
8.394
residents per km²
Floor area
0,5 km²
of which 0,0 km² is water

Age profile

  • 0–15 years 17% 735
  • 15–25 years 19% 840
  • 25–45 years 25% 1.110
  • 45–65 years 25% 1.105
  • 65 years and over 13% 575

Housing and values

Average WOZ value
€ 304.000
CBS 2024
Owner-occupied homes
26%
Rented homes
74%
68% housing association-owned
Single-family homes
19%
81% in multi-unit buildings
Built in the last 10 years
0%
Unoccupied homes
2%
New homes built during the year
0
completed homes

The WOZ value is the average for all homes in the area (valued as at 1 January of the previous year), not the market value of an individual home.

Energy

Avg. electricity consumption
2.460 kWh
per home per year
Avg. electricity fed into the grid
100 kWh
solar electricity per home
Avg. gas consumption
360 m³
per home per year
Homes with solar panels
9%
Gas-free
24%
District heating
61%
Mainly electrically heated
0%
Heat network
60%
of homes connected (WarmteAtlas 2023)
Heating (WarmteAtlas)
37% individual central heating, 6% communal heating, 58% district heating
2022
Geothermal potential
Ongunstig
Slochteren Formation

Consumption is the average across all homes with a connection in the area (CBS); the energy label breakdown is under "Homes".

Amenities and transport links

Large supermarket
600 m
avg. distance
GP practice
800 m
avg. distance
Primary school
700 m
avg. distance
Day nursery
300 m
avg. distance
Schools within 3 km
11
Degree of urbanisation
Very highly urbanised
3.020 addresses per km²
Cars per household
0,6
1.207 passenger cars
Business premises
475
of which 65 in trade and hospitality

Road distances, averaged across all residents in the area (CBS).

Living environment: noise, water, air, light and green space

Average noise level (Lden)
53 dB
municipality 56 dB
Homes exposed to road traffic noise above 55 dB
32%
municipality 32%
Homes exposed to rail traffic noise above 55 dB
2%
municipality 3%
Homes exposed to air traffic noise above 48 dB
0%
municipality 0%
Homes exposed to wind turbine noise above 40 dB
0%
municipality 0%
Night-time road traffic noise above 50 dB
7%
municipality 16%

Noise levels at the 1.853 homes

  • 46–50 dB: quiet 40% 750
  • 51–55 dB: moderate 26% 489
  • 56–60 dB: busy 26% 489
  • 61–65 dB: noisy 7% 123
  • 66–70 dB: very noisy 0% 2

Flooding

Homes at risk of flooding
97%
municipality 53%
Of which, with water deeper than 0.5 m
28%
Of which, with water deeper than 2 m
0%
Maximum water depth
1,1 m
an average of 0,4 m in flooded areas

Air, light and green space

NO₂
14,0 µg/m³
100% above the WHO guideline (10)
PM2,5
8,4 µg/m³
100% above the WHO guideline (5)
PM10
15,5 µg/m³
100% above the WHO guideline (15)
Light at night
Lit
municipality: bright
Green space within 500 m
58%
municipality 46%

Noise: RIVM noise maps (road and rail 2020, air traffic 2022, wind turbines 2024), annual average Lden at 10 m resolution, sampled at each address. Flooding: LIWO (Rijkswaterstaat), maximum water depth map; depth does not indicate likelihood. Air: RIVM annual average concentrations at 25 m resolution. Light: RIVM light emission map 2023. Green space: RIVM green space map 2022, proportion of green space per 500 m. Enable the noise layer on the map above.

Climate and safety

Feels-like temperature on a hot day
44 °C
extreme heat stress
Homes with extreme heat stress (41 °C or above)
78%
municipality 88%
Urban heat island effect
1,2–1,4 °C
warmer on average than the surrounding countryside
Homes with a cool spot within 300 m
95%
municipality 90%
Homes with a medium or high likelihood of flooding
0%
municipality 0%
A floor that stays dry in the most severe flood
97%
Homes with an increased risk of groundwater flooding in 2050
0%
municipality 19%
Homes with a rainwater flow path alongside the building
4%
municipality 15%
Homes within the magnetic field zone of a high-voltage power line
13%
municipality 0%
Homes within 1 km of a wind turbine
0%
municipality 0%

Klimaateffectatlas 2026 (CC BY 4.0): feels-like temperature and urban heat island effect for 2022, cool spots, location-specific likelihood of flooding (at least 20 cm of water), floors that stay dry, risk of groundwater flooding in 2050 (high scenario), flow paths during rainfall of 70 mm per hour; sampled for each home. High-voltage power lines: RIVM Netkaart with calculated distances. Wind turbines: RIVM. Enable the heat layer on the map above.

Safety

Crimes per 1,000 residents
33
Sep 2025 – Aug 2026
Recorded crimes
146
+19% compared with the previous year
Home burglaries per 1,000 homes
2,2
4 burglaries
Municipality
59
per 1,000 residents
Nederland
45
per 1,000 residents

Types of crime (last 12 months)

  • Fietsdiefstal 15% 22
  • Vernieling 8% 11
  • Inbraak schuur/garage 6% 9
  • Bedreiging 5% 8
  • Diefstal uit auto 4% 6
  • Drugshandel 4% 6
  • Mishandeling 3% 5
  • Woninginbraak 3% 4

By year

  1. 1672021
  2. 1402022
  3. 1472023
  4. 1632024
  5. 1362025

Source: police, recorded crimes by area (CBS/police open data, monthly figures). Rates per 1,000 residents are based on the area's population; not all crimes are reported.

Liveability

Weak Leefbaarometer 2024

very poorexcellent

Liveability
Weak
category 4 of 9, assessed in 2024
Score
3,87
−0,24 compared with the national average
Since the previous assessment
+0,00
2022 assessment: Weak
Municipality
Good
score 4,12

Five dimensions: difference from the national average

  • Physical environment green space, water, buildings, noise −0,02 adequate
  • Housing stock type, year built, ownership −0,05 weak
  • Amenities shops, schools, healthcare, public transport +0,07 more than adequate
  • Social cohesion population profile, moves −0,09 poor
  • Nuisance and safety concerns crime and nuisance −0,15 poor

Source: Leefbaarometer 3.0 (Ministerie van BZK, CC0), an estimate produced every two years based on over a hundred characteristics. The score reflects how residents rate liveability on average. Negative = below the national average.

Ground and foundations

Land subsidence (total)
−2,4 mm per year
municipality −1,4 mm
Land subsidence (shallow)
−1,3 mm per year
compaction of peat and clay
Projected subsidence by 2050
4 cm
high scenario
Homes at risk of pile rot
0,0%
zeer laag, municipality of 0,0%
Pile rot in 2050
0,0%
high scenario, drier summers
Differential settlement in 2050
6,5%
homes with shallow foundations at risk

Source: Klimaateffectatlas 2026 (CC BY 4.0): land subsidence from satellite measurements (Bodemdalingskaart), foundation risk by neighbourhood (Deltares/KCAF, proportion of homes with timber piles or shallow foundations at risk). A neighbourhood average, not an assessment of any individual home.

Income and employment

Average income per resident
€ 23.200
per year
Average income per income recipient
€ 29.600
per year
Median household wealth
€ 7.200
Employment rate
62%
aged 15 to under 75
Self-employed people
15%
of the employed population
Top 20% of incomes
8,5%
share of people (20% nationally)