So thought I'd give this a go, feel free to correct etc.
Note: my guitar is tuned half a step down but I've set the tuning accordingly.
G# C# G#
I wanna marry a lighthouse keeper, and keep him company
G# Bb Eb
I wanna marry a lighthouse keeper, and live by the side of the sea
G# G#7
I'll polish his lamps by the light of day
C# C#7 (or C#m)
So ships at night can find their way
G# Bb C#7 Eb7 G#
I wanna marry a lighthouse keeper, won't that be okay?
C#m G#
We'll take walks along the moonlit bay, maybe find treasure too
C#m Bb Eb
I'd love living in a lighthouse, how bout you?
G# C# G#
I dream of living in a lighthouse baby, every single day
G# Bb Eb
I dream of living in a lighthouse, the white one by the bay
G# G#7
So if you want to make my dreams come true
C# C#7/m
You'll be a lighthouse keeper too
G# Bb C#7 Eb7 G# F
We could live in a lighthouse, the white one by the bay
C#7 Eb7 G# F
Won't that be okay?
C#7 Eb7 G#
Peace