Yes, and plenty of people do, but the town gets a vote and it is not a silent partner. There are more than two hundred listed buildings across the area and two conservation areas covering the historic centre and the settlements across the river. Hundreds of applications go in every year, so this is emphatically not a place where nothing gets built. It is a place where what you build gets read line by line. The house you buy is close to the house you keep.
The listing count is the headline. There are 219 listed buildings in the area: 8 at grade one, 9 at grade two star and 202 at grade two. Listing protects the whole building rather than the pretty bit at the front, which means the interior, the fixtures and anything attached to it are all in scope. Alterations affecting the character of a listed building need listed building consent, which sits separately from planning permission and is a criminal matter if skipped rather than a form you catch up on later. Replacement windows, internal walls, roof coverings and rear extensions all belong to that conversation, and the answer is frequently yes with conditions rather than no.
Two conservation areas sit over the town, covering Blandford Forum itself and Blandford St Mary and Bryanston. Conservation area status is a lighter touch than listing but it bites in different places, tightening control over demolition, altering the rules on trees, and trimming some of the permitted development rights that would apply elsewhere without an application. Councils can restrict those rights further by direction, so the only sensible move is checking the specific address with Dorset Council before assuming the national default applies to it.
One scheduled monument sits within the area. That is the strictest protection tier in the system, requiring separate consent from central government for works affecting it, and it matters to anyone buying land near it rather than to most houses in town.
The volume of activity is the useful counterweight to all of that caution. Across the window from April 2024 to July 2026, 1,188 planning applications were submitted in the area, with 507 of them in the last twelve months. People here alter, extend, convert and rebuild constantly. The constraint is not a wall, it is a queue with a design review attached.
One listed building in the area sits on Historic England's Heritage at Risk register. That marks a building in poor condition whose repair may attract grant support and will certainly attract scrutiny. It is a project for someone who wants one, not a warning to anybody buying an ordinary house down the road.
Practically, the answer splits cleanly by address. Outside the conservation areas and away from a listed building, standard permitted development rights apply and a modest rear extension or loft conversion may need no application at all, subject to the usual national limits. Inside the protected fabric, assume the opposite: assume consent, assume materials will be discussed, and assume the timetable is longer than the builder's quote implies. Establish which category a property falls into before making an offer rather than after, because the status attaches to the building and no amount of enthusiasm relocates it.
There is a certain historical justice to all this. The town burned in 1731 and Parliament responded by legislating that the rebuilding be done in brick and tile within four years. Blandford has been told what it may build with for a very long time, and the results are precisely what people now pay a premium to live in.
Freedom to alter your own home is the weakest part of the offer here, and it is the direct cost of everything else the town has going for it. Buy for the building you want to live in, because the version standing on the day you complete is broadly the version you will be keeping.