1. I had this radio fixed by the repairman.
2. I let this doll played by the boy.
3. I bade this work done by the man.
4. I helped my homework done by him.
5. I made this house built by the construction workers.
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Are they all grammatical? Past participles are used as objective complements.
1 is fine, but none of the others make sense as they're written. Revised, the other sentences could be like these:
I let the boy play with this doll.
I bade the man to do this work.
He helped me with my homework.
Construction workers built my house.