A homeowner in Evans called about a pergola last spring and had the location settled before we got there. Right off the back door, attached to the house, over the concrete slab that was already poured. Perfectly sensible. That is where the grill lived and where everybody already stood when they went outside.
Then we walked out at four in the afternoon and the slab was too hot to stand on barefoot. It faces west, there is not a tree within fifty feet of it, and in August that corner of the yard is unusable from about three until seven.
That afternoon is the whole attached-versus-freestanding question in one picture. Attached is cheaper, simpler to build, and closer to the kitchen. Freestanding goes wherever the yard is actually comfortable. Those are often not the same spot, and which one you pick has more to do with sun and walking distance than with the structure itself.
What Attaching It to the House Buys You
When a pergola attaches to the house, one entire side of it is carried by a ledger board bolted to the wall. That means two to four fewer posts, fewer footings, less concrete, and less labor. It is reliably the less expensive of the two, and the gap is not small.
It also reads as part of the house rather than something set down in the yard, which matters if you care how the back of the house looks from the property line, and it matters a little at resale too. And power is easy. Lights, outlets, and a ceiling fan are a short run from a panel that is already twenty feet away, instead of a trench across the lawn.
The tradeoffs are worth knowing. That ledger board goes through your siding into the framing, so the flashing has to be right. Done well it is a non-issue for the life of the house. Done casually, it is a slow leak inside a wall you cannot see, and Augusta thunderstorms that drive rain sideways will find it. Ask any contractor how they flash the ledger. A good answer is specific and immediate.
The other thing attached pergolas inherit is the sun. You get whatever the wall gets, and you cannot move it later. A west-facing wall in July means low afternoon light coming in sideways under the rafters, which no roof design solves on its own. And if the pergola sits under the eave, roof runoff lands on it every time it rains, so the gutter above it has to be working.
When Freestanding Is Worth the Extra
Freestanding carries itself. All four corners get posts and footings, so you are paying more for the same square footage, and that money needs a reason behind it.
Usually the reason is shade you already have. There is an oak at the back of the lot, or a treeline on the north side, and putting the structure there means the afternoon is handled by something older and taller than anything we can build. Sometimes the reason is the view, or getting away from a neighbor’s windows, or the pool being where the pool is. Sometimes it is the grade, because the ground drops off behind the house and leveling it costs more than moving the pergola.
Freestanding also solves a problem attached pergolas create quietly. If the back wall has good windows, building a roof against it darkens the rooms behind them. Putting the structure out in the yard leaves that light alone.
What people underestimate is the walk. Power is the obvious cost, and a real electrical run out to a structure is where a freestanding budget tends to go. But distance is the sneakier one. Past roughly thirty or forty feet from the kitchen door, a space stops getting used for a random Tuesday evening and starts only getting used for things you planned. That is still worth building. Just know which one you are buying.
There is a middle answer that suits a lot of houses here. Attached, close to the door, with the sun dealt with deliberately instead of hoped away. A louvered roof you can close, or rafters spaced tight and run in the direction that blocks the worst of the afternoon, or a drop shade on the west side, or a fan. Moving air does not lower the temperature, but it changes how a hot evening feels, and that is most of the point.
The question to settle before anybody draws anything is not which version costs less. It is where you already stand when you walk outside, and what time of day you are standing there.