A petition to save Hounslow's green spaces has been launched in the wake of plans for three school buildings on open land in the borough.
She is also concerned about plans for a new secondary school on Grasshopper RFC's current grounds in MacFarlane Lane, Osterley, and for another school building on the old Conquest Club site, down the road in Syon Lane.
Brent Lea Rec is currently a public park, owned by Hounslow Council, which also owns the rugby club site.
The old Conquest Club site was privately owned but getwestlondon understands it has already been bought by the Education Funding Agency (EFA) so it can be used to house a new school building and Grasshoppers, should the rugby club move.
Ms Richardson, who often visits Brent Lea Rec with her godchildren, said it was an important asset for many families who live in flats on the Brent Lea estate and do not have gardens.
"I strongly feel there are many areas requiring redevelopment in Brentford without taking over the limited green spaces we have. These areas should be preserved for local people to use and money should be invested in their upkeep," added the 42-year-old.
"Once they are built on it's too late. It has to be stopped now and the areas preserved for future generations to enjoy as an escape from hectic London living.
"I work in education myself and appreciate the need for new schools, but I strongly object to choosing the easiest option and putting them on the nearest piece of green land."
Under the plans for Brent Lea Rec, just off London Road, the free school Floreat Brentford would lease part of the grounds from the council, with the income used to fund improvements to the remainder.
The school is due to open this September and has submitted plans for temporary buildings in the park, but has yet to make an application for a permanent building on the site.
Nishkam School West London, which is currently based in an old office block in Isleworth, would have 1,400 pupils aged four to 18 at the old Conquest Club site when it reaches full capacity.
The Hounslow Improvement Partnership (HIP) School, which is the brainchild of local headteachers, is due to open in September 2017. It has yet to submit a planning application for a new school building.
The council and the respective schools have all said there is a huge demand for more school places locally but a shortage of suitable sites.
The petition, which had 66 signatures as of Thursday (May 7), is available here.