This is a great App I have been using for years when checking for sunlight in houses.
I usually set the date to 27. of December – when the sun is at its worst – and check if I get sunlight over that nearby building or tree.
You can even use the App from remote via Google Streetview to get a first impression!
It´s a well invested €8,49 for Android or Apple: https://www.sunsurveyor.com/
Ask if you have questions or doubts.
I can get you a street view impression of a home you are thinking about for free now – just let me know the address!