The poem uses personification to imbue the suburban setting with a sense of human agency and also to evoke the power of the natural world.
First, the speaker says that the houses in their perfect rows and the neat and tidy trees out front "assert / levelness of surface like a rebuke." While this personification is subtle, it suggests that these houses and trees are actively scolding the speaker for having a "dent[ed]" car door. The perfection of the suburb reflects its residents' dislike and distrust of anything out of the ordinary.
Later in the stanza, the speaker subtly personifies the grass as well, describes it as "discouraged" while being cut into neat and tidy patches by a lawnmower. This adjective highlights the way "power mower[s]," like many of humanity's inventions, are meant to control the natural world rather than to live in harmony with it. It also suggests that human interference "discourages" or dissuades the environment from growing in ways that are natural and healthy.
There's more personification in lines 13-14, where the speaker says that "the driveways neatly / sidestep hysteria." The image of inanimate "driveways" gingerly evading "hysteria"—or irrational behavior—again fills the setting with a sense of agency and power that reflects the will of its inhabitants. The driveways are neat and orderly because the residents of this suburb think that such neatness and order will keep them at a safe distance from "hysteria."
Finally, in lines 22-25, the speaker says that the "too-fixed stare of the wide windows" gives a brief glimpse into the future, in which these houses will fall apart. By describing the "stare" of these windows, the poem personifies the houses themselves as beings with the ability to "stare." This echoes the earlier personification of the houses and trees in their perfect little rows, again implying that the suburb itself is watching and judging all who enter. That this gaze is "too-fixed" suggests there's something off and unnatural about its unwavering watchfulness. It doesn't seem warm or welcoming, but eerie and judgmental.