In or Of
For the following two sentences, I tend to opt for #1 but am not too sure. Please help. Thank you.
1) These three houses are similar in design, except for the roof.
2) These three houses are similar of design, except for the roof.
Re: In or Of
Sentence 1 is standard English usage. Sentence 2 is not.
...houses are of similar design...
...houses are designed similarly...
...houses have similar designs...
...houses have a similar design...
would be acceptable ways to say the same thing.