The plot shop is located on the high street and the outlet will sell plots of land on the Graven Hill site in Oxfordshire to those who wish to build their own home.
The Graven Hill development is set to be the largest of its kind in the UK, delivering up to 1,900 new self- and custom-build homes.
The plot shop promises to pioneer custom- and self-build as a mainstream choice for aspiring homeowners.
“We need to get creative with how we build our housing in this country to deliver more of the right homes in the places people want to live,” said Mr Sharma.
“With the opening of the UK’s first ‘plot shop’, the journey to building your own home can now start on the high street.
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“As confirmed in our housing white paper, we are committed to doubling the number of custom- and self-build homes by 2020 – so that anyone who wishes to design their dream house can do so.
“Through diversifying the housing market in this way, we can give people greater choice over the homes they live in – whether that’s buying on the open market or by commissioning and building their dream home.”
Karen Curtin, managing director of Graven Hill, added: “We are delighted to welcome Alok Sharma in officially opening the Graven Hill plot shop.
“The shop’s town centre location has proven to be integral to its success since our soft launch this summer, and we invite anyone thinking of building or customising their next home to visit the shop for an informal chat on the options available or arrange a visit to [the] site.”