Unless it’s a new development, the neighbors would probably love you for killing the McMansion plan.
Reminds me of a neighborhood I drove through looking at houses couple weeks ago, nice older tract of small ranch houses on fair size lots (6500-7000), lots of mature trees, one story ranch after another, then whammo, a giant 30 foot high 2 story probably 3500 square foot box of house towering over the neighbors without a single tree left.