Wezembeek-Oppem has 14,258 inhabitants across 6.9 km². The average age is close to 41, and 73% of residents own their homes. Average net income is €23,460 per year. The population is 52.1% women and includes 76.2% Belgian, 3.6% German, 3.6% French, 2.1% Italian, 1.6% Polish, 1.3% British, 1% Romanian and 10.6% other nationalities. There are 36 houses for sale, with prices from €365,000 to €1,990,000 and an average of €896,931.
Houses make up 79.4% of the dwellings in the municipality, while apartment buildings account for 20.6%. Across the building stock, 32.6% are open-type houses, farms or castles, 27% are semi-detached houses and 19.1% are closed-type houses. Buildings and apartment blocks represent 20.4%; commercial houses account for 0.7% and other building types for 0.3%. Dwellings average 6.3 rooms, compared with 6 nationally, and the average construction year is 1964. The municipality has 1.4 cars per household, against a Belgian average of 1.3.
For road access, an entrance to the R0 is 2 minutes by car from the town centre, while access to the A3 / E25 - E40 - E42 is 5 minutes away. The N226 and N227 also pass through Wezembeek-Oppem. Public transport includes STIB tram lines 39, between Montgomery and Ban-Eik, and 44, between Montgomery and Tervuren Station. Bus services include De Lijn lines 317, 410 and 830, and STIB lines 76 and 77. The nearest listed stations to the centre are Nossegem, Zaventem, Brussels Airport - Zaventem, Diegem and Merode.
Families have 4 nurseries, 6 nursery schools, 6 primary schools and 2 secondary schools in the municipality. Examples include Les Naninous and Zonnetje Wezembeek-Oppem - Astridlaan for childcare; Vrije Basisschool and Gemeentelijke Basisschool - De Letterbijter for nursery education; Deutsche Schule Brüssel and Gemeentelijke Basisschool - De Letterbijter for primary education; and Heilig Hartcollege and Deutsche Schule Brüssel for secondary education. Shops include Delitraiteur, LIDL, Carrefour and Delhaize, with 1 of each listed. There are no shared bicycles or shared cars, and no known charging station. Brussels Airport is 7 minutes away by car or 44 minutes by public transport.