Below are a few more examples of custom copper sheet metal chimney caps that I've made; placing primary focus on strong design w/as few seams as possible. There is also a link to see more photos and descriptions w/prices they had paid; to help give you ideas of what to request a personalized quote for.

This copper chimney pipe cover and cap projects is for client Steve Fenley in Mulino, Oregon. It is for their 8" stainless steel chimney pipe that is stained with rust streaks.

The inside of the base chamber is 22" x 24". The flashing flange is 34" x 36" for a 6" wide flashing all around. I made it with a wider base so there would be no need for the roof braces to hold it steady in high winds.

Cost for this project: $600 w/o shipping

To see more photos and read more details
of it's construction and installation:
http://copper-by-design.com/cc/cp/Fenley.htm

This copper chimney cap projects is for client Mike Gassier in Middletown, CT. We spent nearly 2 years working out the details of this project since his first e-mail. The inside of the base is 22" x 39". The roof of this is made at a 6/12 pitch and has a 3" overhang past the sides of the base on all sides.

Cost for this project: $2,980.30 w/crate & shipping
to a residence with hydraulic lift-gate service

To see more photos and read more details of it's construction and installation:
http://copper-by-design.com/cc/cp/Gasior.htm

This copper chimney cap projects is for contractor Daniel G. Corker Jr. of DACO Interiors, Inc. (804) 798-2470 in Ashland, Virginia for his client in Mechanicsville, VA.  It is for their gas log fireplace. The inside of the base is 35" x 43.5".  The roof of this is made at a 8/12 pitch and has just a 2" overhang past the sides of the base on all sides.

Cost for this project: $3,304.20 w/crate & shipping with hydraulic lift-gate service

Note: I under bid this project by $836.63 mainly by not including the pan/collar and the eaves in that quote, but I stuck the the price I had quoted him of course. He was a very good client to work with. I would recommend this contractor if you happen to be in that area.

To see more photos and read more details of it's construction and installation:
http://copper-by-design.com/cc/cp/Corker.htm