问下后院加个凉亭，算不算temporary improvements

自住房后院想加个Louvered Pergola,这个是不是要HOA批准？我读了一下文档，没有发现具体要求。只是说No temporary building or structure shall be permitted except for those trailers, barricades, trash receptacles or portable toilets that may be approved or required by the Design Review Committee