Background: French energy policy calls for ambitious growth in the biogas sector, with the quantity of biomethane fed into the public grid targeted at 8 TWh per year by 2023. Although today biomethane in France serves predominantly as vehicle fuel, the domestic heating market, with its high share of gas heating, should see biogas growth in the future, provided consumer demand can develop and suppliers can emerge savvy enough to respond to that demand. Methods: Towards this end, we conducted qualitative interviews with some mixed-methods elements with French consumers in the South of France to explore their knowledge of and attitudes towards biogas as well as their preferences for specific product features of biomethane-based gas products. Results: We found that today's consumers have little knowledge of biogas production and feel uncertain and doubtful about products. They can name reasons, both environmental and financial, for and against biogas. They favor biomethane products from agricultural residues and biodegradable household waste, rejecting energy crops. In principle, they value local production by small suppliers, find ecolabels helpful, and look favorably upon extra environmental benefits accruing from the sale of biogas. However, consumers labor under misconceptions regarding the costs of biomethane production. Conclusion: Crafting communication strategies that address widespread consumer doubt and consumer perceived risk is the challenge suppliers face in order to allow consumers to make a well-based decision.