Objective Hypertension in pregnancy and preeclampsia have been linked to poor outcomes in cognitive, mental and psychomotor development; however, few longitudinal studies have researched their effect on offspring motor development, particularly in late childhood and adolescence. The purpose of this study was to determine if maternal hypertensive diseases during pregnancy are a risk factor for compromised motor development at 10, 14, and 17 years. Study design Longitudinal cohort study using data from the Western Australian Pregnancy Cohort Study (Raine). Main outcome measure Offspring (n = 2868) were classified by their maternal blood pressure profiles during pregnancy: normotension (n = 2133), hypertension (n = 626) and preeclampsia (n = 109). Offspring motor development, at 10, 14, and 17 years was measured by the Neuromuscular Developmental Index (NDI) of the McCarron Assessment of Motor Development (MAND). Methods Linear mixed models were used to compare outcomes between pregnancy groups. Results Offspring from pregnancies complicated by preeclampsia had poorer motor outcomes at all ages than offspring from either normotensive mothers (p ≤ 0.001) or those with hypertension (p = 0.002). Conclusion Hypertensive diseases during pregnancy, in particular preeclampsia, have long term and possibly permanent consequences for motor development of offspring. © 2014 International Society for the Study of Hypertension in Pregnancy Published by Elsevier B.V. All rights reserved.