Dodds & Erwin Ltd. Share: AgricultureHomeowner ServicesProfessional Services Dodds & Erwin Ltd. Visit Website 2870 Rideau Ferry Road Perth, ON K7H 3C7 (613) 267-3808 (613) 267-3815 (fax) Dodds & Erwin Ltd. About Map About We have been in business since 1918, and we services all of Lanark County. We feel confident that we can cater to your needs. We get the job done and we donâ€™t just meet expectations; we exceed them. What's Nearby? Distance: 5 10 15 20 25 50 km.