The amount of planning applications last year increased in Aldenham and the council are concerned about the amount of back gardens being sold off to developers, according to an annual planning report.
The parish council released in their annual report, which said 244 applications were received last year.
Overall there has been a slight reduction in the number of complete homes demolished and rebuilt as larger, speculative developments.
Councillor Viv Charrett said this masked the "worrying trend" because back gardens are being sold off to developers for "unsuitable small-close developments", causing public protest and a large number of houses are being turned into large multi-storey homes.
Councillor Charrett said: "The parish council planning committee, strenuously object to the loss of bungalows, as they should provide a downsizing opportunity for residents when their large homes get too much for them."
The report also specified Radlett needs to provide around 50 more affordable homes over the next 15 years.
A new Neighbourhood Plan is underway, which will take 18 months to two years to completely.