Federal Act
on Spatial Planning
(Spatial Planning Act, SPA)¹

¹ Au­thor­isa­tion may be giv­en for ag­ri­cul­tur­al res­id­en­tial build­ings to be used for non-ag­ri­cul­tur­al res­id­en­tial pur­poses, provided the es­sen­tial char­ac­ter of the build­ings is pre­served.⁶⁵

^1bis …⁶⁶

² A com­plete change of pur­pose of build­ings and in­stall­a­tions that have been re­cog­nised as be­ing worthy of pre­ser­va­tion may be au­thor­ised if:⁶⁷

a.

these have been giv­en pro­tec­ted status by the com­pet­ent au­thor­ity; and

b.

their con­tin­ued pre­ser­va­tion can­not oth­er­wise be guar­an­teed.

³ Per­mits un­der this Art­icle may be is­sued only if:⁶⁸

a.

the build­ing or in­stall­a­tion is no longer re­quired for its pre­vi­ous pur­pose, is suit­able for the in­ten­ded use, and no un­ne­ces­sary re­place­ment build­ings will res­ult;

b.

the ex­tern­al ap­pear­ance and the ba­sic struc­ture of the build­ing re­main es­sen­tially un­changed;

c.

no more than a minor ex­ten­sion of ex­ist­ing in­fra­struc­ture is ne­ces­sary and all in­fra­struc­ture costs in­curred as a res­ult of the com­plete change of pur­pose of the build­ings and in­stall­a­tions will be passed on to their own­ers;

d.

the ag­ri­cul­tur­al cul­tiv­a­tion of the sur­round­ing land is not en­dangered;

e.

there are no over­rid­ing in­terests to the con­trary.