Is there a way to increase

Seeing as we are on the topic, can i just but in with a quick Q if the OP doesn't mind?

You said that if you buy two plots of land on the same sim, you can use the extra prims from plot 2 on plot 1. My Q is, how does this work? Do you just carry on building in plot 1 or do you have to physically change the prim allowance of each plot?
I just thought I would ask because I was wondering how someone who owns a sim would limit each parcel he rents out to a certain number of prims.

Thanks and sorry for the hijack

In about land, objects tab, the first line is "simulator privilege usage" and shows how many prims you can use in the entire sim. This is calculated based on all the land you own in the sim.

The next line in about land objects shows you how many objects the parcel supports. You cannot change the allowance of a parcel other than resizing the parcel by joining it with another or subdividing into new, distinct parcels.

If you have 2 512s in a sim and want to use all the prims on one parcel, fine - but the other one has to be empty.

So I take it you just start building on one and don't stop?
Say i have 2 x 512s in 1 sim, each with 117 prims. I need 150 prims on one lot, so i start building on lot 1, keep building till i have used my 150 prims. I can then go to my other lot, and build 84 prims? i know that is using all of them but i could do that theoretically if i wanted to?

Yes, you could do that.

There is one options that hasn't been mentioned yet. If you own (or you live on) a private island, you can ask the island owner to set a Simulator Object Bonus. This increases the prims available on each parcel by a specified percentage. The snag is that the _entire simulator_ is still limited to 15000 prims - that value does _not_ change - so the system counts on the island owner managing things so that, even though there are more prims on each parcel, the total prims don't go over the limit. (For example, they could adding a zero prim river to the island, so that all the prims that would have been available for the space where the river is are free to be used elsewhere.)

Yes you could - you can distribute your 234 prims across the parcels as you see fit (parcels must be in the same sim). So you could have 234 on one 512 plot and none on the other, or any combination.

Yep - this can be done as well, and is precisely what i have always done with my sims - set an object bonus of x2, that way every plot is double primmed. I then set aside 32 000 sq m of land so that shops in commercial areas can have space around their build, and when I ran residential regions, that residents could build to the parcel boundary, yet have 20 m of space around their plots for chat distance privacy (and ban lines cannot be seen from this distance either).

I was in a body shop yesterday and saw three avatars spinning showing off shapes. All had notes in their profiles noting that they are bots. So there you go, a good use for a bot . . maybe. Get a bot, put it on the land, attach your house to the bot, and there you go . . . . . annoy your neighbors, watch as your house pops in and out as the bot pops in and out, but it could work. I do know I've accidently attached my house to myself once.

Yep. (Qie does the arithmetic again.) Yep.

And if you find you need just another 21 prims to make everything perfect: Make an alt, make a group, add the alt to the group, then deed the land to the group, with owner contributing the tier along with the land. Automagically, you get a 10% land bonus. Now, find somebody in the sim who wants to sell you exactly 96 sq.m.

Okay, maybe that's not worth it, just for 21 prims.

Another Pepsi spewed on the monitor! *wiping tears from eyes*

I dunno, to a noob like me, 21 prims is a lot

Automagically - thats a cool word Qie

Another solution for finding prims, and this is not strictly obvious... is to simply use them very economically. For example, a set of stairs could be a ramp instead, a prim fence can be a single prim textured panel, etc. You can do wonders with good textures !

There are also some tricks with building walls, for example a single path cut hollowed block can serve as the corner of a building instead of using two prims.

and for avatars with short legs like mine, this is a practical necessity anyway. or a sculpty. Gearsawe Stonecutter has a pretty nice sculpty post-and-rail fence for example. Sculpties can save on prims, but... well, I use them *extremely* sparingly because they rez for me at the rate of about one per login session.