I am doing a english suburbs style world, but while I have suburban decorative buildings from boroughsburg. I want to make a decorative buildings that are more in line with English buildings, I am very unsure where to start.

My guess is that the designer of those homes used the Sims 3 itself to help them, but I am wanting to do something with skills I haven't learned.

Where would I start perhaps?

Hello @landon
Have you googled/researched English suburbs for the type of buildings you would like to create?
English villages are a great place to start with some really old buildings dating back to Tudor times.
I used some barn wall panels to create the exterior of the buildings; indoors a lot of the rooms have low ceilings and dimensions. I think the building tools in Sims 4 might suit you better as they offer different wall heights?

Good luck with your project.

Are you looking to make objects like rabbithole buildings as deco? If so, you would want to start with either modeling, finding a model from a 3D marketplace, or converting one from another game. Then you'd follow the process for making a deco object for TS3. Buildings that light up at night have some extra steps, but otherwise you'd just need to learn how to work with objects first. Start small and then work your way up!