Are you looking to upload the photos to Houzz or download a photo you found on Houzz? As far as I know the photos on Houzz are protected and you are not able to download them. However, if you are wanting to show a photo to a contractor, most professionals are on Houzz and you can simply add your contractor as a collaborator to your idea book. If they are not on Houzz, if you have an iPad or a smart phone you can pull up the Houzz app at your next meeting and show them your ideas. I do this often at places I am ordering materials (such as flooring and tile) from.

this is my own personal project

Ok that's easy! At the top of your bar select Upload, then fill in your information (i.e. is this a kitchen or living room? What style? etc.) Then at the bottom you can upload your photos. Houzz also gives some tips on what to upload and what to not upload. I've attached some screenshots below to help.