Naveen and Savita Seth from Uxbridge were prosecuted following an investigation by Hillingdon Council into their management of a house in multiple occupation (HMO) on Old School Road.
The couple had been letting the three-storey property to five tenants.
The Seths, who are now estranged, admitted to operating an unlicensed HMO.
Naveen Seth also admitted failing to comply with an improvement notice and breaching housing regulations.
Both were sentenced at Uxbridge Magistrates’ Court on Tuesday, December 9.
A tenant first raised concerns with the council on Thursday, November 7, 2024, reporting water penetration, damp and electrical problems.
An unannounced inspection on Tuesday, November 19 confirmed the property was an unlicensed HMO and found multiple safety failings.
Hillingdon Council found that fire safety measures were seriously lacking.
The property was missing mains-wired smoke detectors, did not have adequate fire doors, had blocked escape routes and had unserviced fire extinguishers.
The home was also described as being in poor and dirty condition.
The council issued an improvement notice requiring the Seths to fix all defects by Monday, March 3, 2025.
A follow-up inspection on Thursday, April 10 found they had failed to comply.
Further concerns were raised in May when the fire brigade was called to the property due to a smoking hob.
Firefighters noted the continued absence of fire doors.
Each defendant also had a previous conviction for fraud, which was taken into account at sentencing.
Councillor Steve Tuckwell, Hillingdon Council’s cabinet member for planning, housing and growth, said: “This prosecution shows how seriously the council takes these matters.
“Poorly managed HMOs can have a significant impact not only on tenants, but also on neighbouring residents and the wider community, particularly where properties are not properly managed.
“I would like to thank the housing enforcement team for their work in bringing this case forward.”
Naveen Seth, 57, was fined £657 and ordered to pay a victim surcharge of £263 and prosecution costs of £5,268.
Savita Seth, 56, was fined £253 and ordered to pay a victim surcharge of £101 and £585 in costs.
