Informal housing structures constructed of materials such as wood, corrugated iron or fibreglass sheeting, designed to accommodate single families, constitute 'dwelling houses' within the meaning of town planning schemes and are therefore permitted uses in Residential 1 zones. When interpreting town planning legislation, courts must apply section 39(2) of the Constitution to promote the spirit, purport and objects of the Bill of Rights, particularly the rights to adequate housing, dignity and a healthy environment. A rigid interpretation of town planning schemes viewing them through the prism of developed societies is inappropriate in South African circumstances given the legacy of apartheid and ongoing housing challenges. The obligation to fulfill conditions attached to township establishment does not preclude a local authority from using its own property in conformity with the applicable zoning scheme before those conditions are met, provided such use does not involve steps toward disposal of individual erven to purchasers.