Start with drawing the horizon line through the middle of the paper.
Place 2 vanishing points.
Designate areas for each of the six birdhouses. Use very fine lines - these are going to be erased later.
Work with one birdhouse at a time.
Start with building a basic box in 2 point perspective:
- front corner
- receding lines
- left and right corners
- bottom side
Find the center of the bottom side by drawing two diagonal lines.
Add a post to the central area.
Use 2 lines and a curve to define the post.
Posts can be any shape.
Find the center of the front side by drawing two diagonal lines and adding a vertical center line.
Decide how high you want your roof top to be (place point 1).
Draw lines from the top of the roof through the front top corners
Have the roof sides go past the corners.
Choose the bottom corner of the roof: point 2.
Connect point 2 with the left vanishing point.
Points 2 and 3 should be on the same receding line.