I rented a small office from a HA in Fife until recently. My office was within the their own admin block but half of the high street is owned by them; with various shops, a veterinary surgery, a dance academy and such like on the ground floors with the first floors (in some cases the second floor) all being residential units, varying from one bed to 3 bed flats (all with lifts) and all new builds. They also have their own energy company with wind turbines on long since redundant coalfield sites from which they generate revenue. I did offer to connect the CEO of the HA with Chris Thomas but it wasn't taken up.
ETA: And all rents are pitched in the mid-market bracket, making them affordable.