There are lots of factors to consider when you try to plan space for pigs and usually you'll not get the answers until the pigs are on the ground and you can gauge how quickly they're turning it, how wet it is and how long before you need to move them (it depends on whether you like seeing them belly deep in constant mud - I can't stand it, so like to move them regularly).
Recommended stocking density for permanent pigs is 6 per acre, weaners for pork can be raised in a much smaller area, but the ground will suffer as a result (as well as making tending to them a nightmare and towards the end it can get downright dangerous) and if it's wet, cold, muddy ground the pigs won't like it much and won't do as well as they could - they only like mud when it's hot
Your 1150 square feet is only 0.02 of an acre, even using the whole space you have there would only give you around 0.1 acre - which
might be pushing it a bit IMHO. It's about the same size as my smaller pens and with the rain we had last year they didn't last a whole 'growing season' for ours
I'd section it with electric, let them onto half and see how they go - but prepare yourself to let them have the other half and possibly need to move them again before slaughter.
Karen