Awkward equity through un-assessed land?

[John Kaspar]

So, just purchased a house a few weeks back. When the appraisal was done, the paperwork say .41 acres. Yet i received my deed in the mail shortly after and it said i have 1.1 acres. After doing some research,  the land is wetlands and generally undevelopable, but will this yield me any equity as my land amount has doubled since the appraisal ?