Inspectors from the HSE's Merseyside and Cheshire teams spent Monday carrying out spot checks on sites between Mere and Macclesfield where homes were being constructed or refurbished.
The regulator said it had uncovered a series of issues that were “capable of causing illness, injury or death on site”.
Of the 14 premises visited, there were 10 enforcement notices served – including three on one site alone.
Five of the notices were prohibition documents, requiring work stop on site immediately.
Problems found included workers at risk of falling from unsafe scaffolding, unsafe movement of machinery near excavations and unsafe use of electrical supplies at mains voltage, particularly in wet and muddy areas of site.
During an earlier initiative, carried out in February, 187 inspections were conducted across the north west with enforcement action taken in 103 cases.