Fillers, which are available in the country, are essential for the production ofrnmagnesia cement boards. These include pumice and lignocellulostic fillers suchrnas bagasse, sawdust and coffee husk. While applying these fillers to produce thernboards, their nature and performance should be studied.rnMagnesia cement was used as binding materials; varying boards were producedrnfor different proportion fillers with fixed ratio of magnesium oxide andrnmagnesium chloride.rnFor the board produced, density, water absorption, and setting time as well asrnmechanical properties such as the compressive strength and the bending strengthrndetermined. In addition, the effects of different fillers on the properties of thernboard and production cost were examined.rnWhen the saw dust and coffee husk filler substituted the current used bagassernfiller, the water absorption and setting time of the boards reduced. While therndensity, bending strength and compressive strength of the board increased.rnThe mix ratio of fillers and pumice powder had also influence on the physicalrnand mechanical property of the boards. The test results showed as the proportionrnof the pumice increased, the mechanical strength of the boards increased and thernsetting time of the cement paste reduced.rnThe cost analysis showed that the saw dust board production cost was lowerrnthan coffee husk and bagasse board cost. While the production cost of the coffeernhusk board was slightly higher than others.rnviiirnIn aim of production of filler boards as alternative building materials are, therncost comparison showed in the possibility of producing relatively low price thanrnthe hollow concrete blocks included finishing work cost.