A fire at a property in Shaftesbury Road West Moors on Friday 27th May is being treated as suspicious.
Officers investigating the incident are appealing for witnesses or anyone with information to come forward.
It was reported that the fire involved a row of bushes adjacent to the property and then spread, causing damage to the address.
Following enquiries and liaison with the fire service, the cause of the fire is believed to be deliberate.
Police Constable Benjamin Sutcliffe, of East Dorset police, said: “This incident has had a significant impact on the local community and we are carrying out a number of enquiries to try and identify who was responsible.
“I would urge anyone who witnessed what happened, or has any information that might assist our enquiries, to please contact us.
“I would also urge residents with home CCTV systems, or any motorists with dashcam fitted who were in the vicinity around the relevant time, to please check their footage for anything that might help our investigation.”
Anyone with information is asked to contact Dorset Police at www.dorset.police.uk/contact, via email email@example.com or by calling 101, quoting occurrence number 55220084742. Alternatively, independent charity Crimestoppers can be contacted anonymously online at Crimestoppers-uk.org or by calling Freephone 0800 555 111.