Report on a geophysical survey by magnetometry undertaken prior to the construction of a new residential development on land north of Church Walk, Sibsey. East-west aligned ridge and furrow was identified across the site, and a stronger signal with the same alignment was interpreted as a field boundary ditch. In the southwest corner of the site was a dense concentration of linear and discrete anomolies between the road and a north-northwest to south-southeast aligned boundary ditch. These features were interpreted as possible tofts and related features associated with the Medieval street frontage.