Families now have longer to have their say on what 6,000 eco-town homes are going to look like.
Bicester’s Exemplar eco-town - made up of energy-efficient houses - will spring up over the next 20 years on land to the north west of the town.
Cherwell District Council’s draft Supplementary Planning Document for the site was due to run out on January 23.
But the consultation period has now been extended until February 20.
The document provides guidance to developers and will be used to guide future planning applications for the north west of Bicester.
Construction of the eco-town began in April and will include a primary school, shops, offices and a business centre.
The first wave of 393 homes, including 119 affordable ones, are expected to be completed by 2019.