Campaigners have collected more than 4,000 signatures against plans to turn playing fields into a touring caravan site.
The Save Broadfields campaign started the petition in opposition to the second set of plans for Broadfields playing fields, just of Headstone Lane.
The petition of 4,228 signatures has now been handed in and the plans are due to be heard by Harrow Borough Council’s planning committee next month.
The site's owners Harrow Community Sports Ltd last year submitted proposals for a site with 75 pitches but withdrew the plans just before they were due to be heard.
Georgia Weston, who has led the campaign said: “To get as many people signing this petition against these plans for a second time just goes to show how important these fields are to people.
"I think most people want to see these fields used for the benefit of the community and I hope this application is rejected.
“The plans are going to benefit a couple of businesses and the community will miss out.
“At the moment these fields are just sitting the going to waste. They should be used for sport so everyone can enjoy them.”
Following last year’s withdrawal, the owners of the site have compiled several reports to show the proposals can work.
The reports also argue the caravan site would cause no adverse impact on the habitat, biodiversity and heritage of the land.
Richard Gabriel also says there is a demand for touring caravan sites in North West London and using the site for sport is no longer financially viable for the company.