(Please note that in certain situations,  what ,  when , and  where  can function as relative pronouns.) Relative pronouns introduce relative clauses, which are a type of dependent clause. Relative clauses modify a word, phrase, or idea in the main clause.
The 2014 Survey of Construction (SOC) from the Census Bureau shows that the average completion time of a single-family house is around 7 months, which usually includes around 25 days from authorization to start and another 6 months to finish the construction.
Some disadvantages to building a house include: 1  Time: It can take anywhere from four months to six months to build a home. 2  This is a long time to wait and things can change while you are waiting to move. 3  Limitations: You might be limited in the style of home you can build in your price range.