Hougang is one of Singapore's mature HDB towns. Most blocks date from earlier decades, many owners have lived here for years, and a steady number of flats change hands on the resale market.
Hougang Central is the hub, where the bus interchange, the mall and the MRT station on the North-East Line sit together.
Kovan is one MRT stop towards Serangoon and mixes HDB blocks with condos and landed homes, so it behaves like a small private-property market of its own. Lorong Ah Soo belongs to the older core of the town and is far from the launch-condo feel.
Owners here think about remaining lease, the condition of the flat and what needs fixing next. Sengkang and Punggol, a few stops north, are newer towns with different needs, and ads copied from them sound like an outsider.
PropertyGuru, 99.co and the HDB resale portal carry most of the flat listings, so a local firm wins by knowing the town and the job.