Apartment buyers will find 9 flats for sale in Erquelinnes, with prices from €115,000 to €179,999 and an average asking price of €150,000. The municipality has 10,003 residents and covers 44.5 km². Its average age is about 40; 69% of residents own their homes, and the average net income per person is €15,160 a year. Women make up 51.3% of the population. Nationalities are 92.9% Belgian, 4.9% French, 0.8% Italian, 0.1% Moroccan, 0.1% Lebanese, 0.1% Romanian, 0.1% Pakistani and 0.9% other. Apartments are a small part of the local housing stock: 3% of dwellings are in apartment buildings and 97% are houses. The average dwelling has 6 rooms, and buildings date from around 1912 on average. Building types include 33% semi-closed houses, 29.3% closed houses, 27.8% open houses, farms and castles, 3.9% commercial houses, 3.2% other types and 2.7% buildings and flat blocks.
Road access includes the N40, N54a, N55 and D336. From the town centre, the nearest stated motorway access is an entrance to the A7 / E19–E42, 24 minutes away by car; an entrance to the A15 / E42 is 27 minutes away. Bus connections include TEC 108 (Binche–Erquelinnes), TEC 129 (Macquenoise–Mons), TEC 134/ (Mons–Beaumont) and express service E110 (Beaumont–Mons), alongside the NMBS/SNCB bus line between Tournai and Mouscron. Rail stations near the centre are Erquelinnes-Village, Erquelinnes, Erquelinnes-Frontière, Solre-Sur-Sambre and Labuissière.
The local school network comprises 6 nurseries, 11 nursery schools, 11 primary schools and 2 secondary schools. Ecole Fondamentale Libre Notre-Dame and Ecole Fondamentale Communale are among the named nursery and primary schools; the secondary options include Ecole D'Arts Et Metiers and Institut Technique De La Communaute Francaise Erquelinnes. For groceries and everyday shopping, there is 1 Trafic, 1 Colruyt and 1 Delhaize. No shared-bike or shared-car scheme operates in the municipality, and there is no known EV charging station. Brussels South Charleroi Airport can be reached in 33 minutes by car or 52 minutes by public transport. There is 1 flat for rent at €850 per month; the stated minimum and maximum monthly rents are both €850.