In fact, I am usually connecting to wifi on my phone about 30 yards before I pull into my garage.
That actually brings up a point I hadn't thought of before. Most routers now should have settings to change the signal output intensity and lots of them default to less than 100%. If your coverage is close but not quite enough, try digging around in the settings to see if you can bump it up. You may not even need anything new.
But if you're getting bad reception due to walls that block the signals, like concrete foundation or....metal siding (I know that's not really a typical housing material in most places, but if you've ever gone into an Ikea or Costco and noticed you have really poor reception, that's a big part of the problem) or metal filing cabinets or other furniture that block the signal or something like that then your best option is a mesh system to get around the obstacles because you can place each access point in optimal positions around the house.