Bob is the hard working and dedicated resident builder for Fixham and Spring City. There is no build too big or too small for Bob and his enthusiastic team, who will always jump to assist their community in every way they can. Bob's optimistic attitude always shines through, especially when reassuring his team with his empowering catch phrase: "Can we build it? Yes we can!"
- Bob, being the title character, has appeared in every episode.
- In the Thomas & Friends MINIS range, the engine Construction Toby features him inside his cab, and makes it the only variant which isn't in a crossover theme that features a licensed character. It's probably due to the fact that Fisher-Price didn't need permission due to them both being owned by HiT.
- Lee Ingleby (UK)
- Colin Murdock (US)
- Um Sang-hyun (Korean)
- David Holt (as Young Bob in Bob's First Build)
- Daniel Magon (Hebrew)
- "Can we build it?" (catchphrase)