Sefton Central Labour MP Bill Esterson said he was disappointed that the planning committee was unable to find planning reasons to reject plans to build 13 new houses in Hightown given the concerns raised by residents and by the parish council.
Bill met with Hightown Parish Council who objected to the plans to build 13 two-storey houses on land off Kerslake Way and Lower Alt Road, prior to the decision being made.
The MP wrote to Sefton's planning committee detailing the parish council and Hightown residents' concerns.
But final approval was granted last week.
Bill said: "I am disappointed that the planning committee wasn't able to find a way of supporting residents in Hightown who are very worried about this development. Residents understand that there has to be good planning reasons for turning down a planning application but I know that there were hopes that the committee would agree that there were good reasons for rejecting this plan.
"Residents who contacted me, were concerned about the overall impact of this development on Hightown. They had concerns about the detrimental impact of the development on local traffic and the infrastructure of the village as a whole.
"They were also concerned that the development would change the distinct character of Hightown.
"These were all concerns that I completely understand.
"I hope that when the developers move in, the planning department will do its utmost to make sure they mitigate the impact of the development on the existing community."
Bill thanked Hightown Parish Council for all of the work they have put in regarding this development.
Bill said: "I know Hightown Parish Council laboured very hard on this issue. I would like to thank them for all their hard work.
"I will continue to support them in the coming weeks, months and years to ensure that the views of the existing community of Hightown are considered very carefully when building work starts."