Debbie Bailey, who also lives on Damask Way, said she fears Lower Marsh Road will struggle to cope with an influx of traffic.
She said: “This road already experiences congestion and presents safety concerns for motorists, pedestrians, and cyclists.”
Backhouse has sent 8,000 leaflets to households in Warminster about its proposals.
The company’s bosses said feedback received at this outline planning stage will “inform the continued evolution of the scheme through the planning process”.
Michelle Hyde, backhouse managing director, added: “Throughout the evolution of the proposals, our focus has been on creating a high quality and sustainable development that reflects the character of the area while helping to meet local housing needs.
“We recognise that new development can generate questions within the community and we remain committed to maintaining an open and constructive dialogue throughout the planning process.”