It is particularly difficult (and expensive) for us to dig up nearby roads as we are situated next to a number of hospitals and, therefore, important emergency routes.
One solution we went to have a look at yesterday was an outdoor wireless mesh network that made use of the power available from existing street lights.
As you can see it was a rather grey day, but atop the lamp post is a point to point wireless link back to campus and using PoE off that is a Motorola outdoor access point with one 802.11a radio antenna connected to a mesh of other AP's as well as an 802.11b/g/n radio antenna providing wireless access to the houses nearby.
The basic idea is:
If the council aren't amenable to having us install on street lights (as an alternative to digging up the road) we already have a CCTV pole there that we could make use of and install the mesh AP's on the chimneys instead. All we would have to do is get power up to the chimney stacks.
There is a huge cost saving not having to install fibre, data cabinets, cabling and building level switches and access points in every, or almost all, of the 46 properties.
It is a solution we haven't really thought much about before, although we have used a few point to point links previously and still having one in use. The numbers of access points in the mesh would depend on the results of the pre-installation survey and, at least if we do install them on chimneys, we have more locations to choose from.