you can start.. by defining the rather common term SHRUB ...

do you want more conifers..

or do you want flowering shrubs ...

but.. to be clear ... NOTHING ever stops growing at some magical height ... and how fast you have to start pruning.. depends on the plants annual growth rate ... if it grows a foot per year.. it will soon exceed your space.. whereas.. if it grows 6 inches.. you have twice the time ..

a pic of the spot.. would sure get you the best info ...

ken

Most of the broadleaf evergreens won't be happy in all day sun in the winter in zone 4 since the combination of frozen ground and dry air means that the leaves get winter burned. So you pretty well limited to conifers IME unless they are shaded by a building or something to the south, so you might want to ask in the conifer forum as well.

Are you OK with ones that grow wider than tall or do you want them taller than wide?

Generally what is your soil like, both pH and texture?

If you add location info to your profile, it helps get you better responses since it will post with your name. Here's how:

Go to Your Houzz in upper right of every page, click Edit Profile, and on the left side click advanced settings. Well down the advanced settings page is a blank labeled Climate Zone for Garden Forums along with a link to find your zone.

If you add info on your state or the nearest large city you will get even better information since zone only relates to average coldest winter temperatures.

Then return to the top of the page and click Done Editing.

Had to replace the yews since we were widening the entrance deck by 3 feet. And they would have been right at the edge. I would only replace with more yews if I got a crash course in pruning them. The ones I had grown into strange shapes.

You can cut yews anywhere on the branch and they will grow back. If you don't plant in pairs of the same kind of plant then they won't have to be identical to one another for the effect to work - and you should only plant matching pairs in front of your house if its design is geometrically symmetric anyway, that is with a uniform pattern all the way across the facade, with its own identical, paired or repeating elements.

Buxus sempervirens 'Graham Blandy' or 'Dee Runk' can be maintained within your stated size.

Marshall