<p>The coastal belt of Bangladesh is highly susceptible to natural disasters such as cyclones, storm surges and floods. The marginal people living in those regions frequently lose their homes and it exacerbates their socio-economic vulnerability. This study proposes a low-cost and sustainable structural alternative from a comparative assessment that was conducted among reinforced cement concrete (RCC), steel concrete composite (SCC) and timber concrete composite (TCC) using both conventional and recycled aggregate (RA) for these disaster-prone areas. Each scenario was evaluated in terms of structural performance, construction cost and environmental sustainability. Code-based equivalent static analysis (ESA) and response spectrum analysis (RSA) was conducted. TCC structure showed structural performance comparable to RCC and SCC. To draw a contrasting idea aside from the estimated cost, a life cycle analysis (LCA) were carried out to draw out the carbon footprint (CF) during the material production stage. The findings highlight that although the TCC structure has a construction cost 1.73 times higher than RCC due to the high timber price, it offers a striking 71.39% reduction in global warming potential (GWP) when used with recycled aggregate. On the other hand, a saving of 23.14% can be achieved for TCC with recycled aggregate without including the price of timber itself, considering local abundance. Moreover, utilization of RA reduces overall project cost up to 12.96%, 5.62% and 4.22% for RCC, SCC and TCC, respectively. The study enlightens TCC with RA as a potential green alternative to traditional housing for alleviating the coastal housing crisis in Bangladesh.</p>