Anne here, and no, I’m not looking for a new house for myself. I’m searching for one for my characters. I do it with every book, and because I live so far from the UK I can’t afford to fly to the UK to research every location. And the part of Australia I live in (Victoria) was colonized in the 1830’s which is too late for any buildings to be useful for for my period (Regency, 1811-20) So my location scouting is mostly done on line, with maps, and with books. And sometimes with a photo taken by a friend in the UK (Thank you CC Coburn). This one I used for the colors in the sky at a particular time of year, not the location.
For my just-finished novel, Marry in Secret, I needed two houses, one a small London house, and the other the country seat of an Earl.
The first one was relatively easy — I really only had to choose the street, because I didn’t want one of the big ultra-expensive fashionable houses, but a smallish house in a smallish street on the edge of Mayfair.
For London streets I usually use the Richard Horwood map of London or else this one, William Faden’s update of the Horwood plan, because it’s only one year after the date in which this book is set. Both plans have wonderful detail showing the houses, the back yards, the gardens and all kinds of lovely detail.