I've added new buildable space as a current bandaid as I have received feedback that building area is getting constrained with the new updates. 

If you wish to leave feedback and see improvements, don't hesitate to comment in the new Community Board here! https://yyz.itch.io/havendock/community

Known issue: 

• You cannot stack houses on Mac/Linux builds and on the web version. This will be fixed in the next update.

The web version of v0.41 is pending approval on crazygames and should go live soon.