The three MPs representing the Harborough District in Parliament have written a joint letter to council leader Phil Knowles asking the council to publish secret maps of potential housing sites which have so far only been shown to councillors and not the public.
The council is aiming to submit a new local plan during next year, which will determine where homes are to be built in the district.
Councillors have been shown maps of sites which have come forward and which officials think are likely to be viable.
So far only a miniscule proportion of residents have taken part in the consultation on the new plan, with many completely unaware it is happening.
The letter, from Alicia Kearns, Alberto Costa and Neil O'Brien says:
"The council made the decision to ram through their local plan on an accelerated timescale, and spent about £2 million of local taxpayers money in order to do that.
So far, the so-called 'consultation' has been a joke, with minimal effort to engage local people. As a result, almost no residents are aware of the process.
Now we are coming into the final stages of the plan-making process and councillors have been shown maps of sites that council officials think are viable.
So we are getting into the real meat of deciding where all these extra houses are to go.
Surely it is now time to publish these secret maps so that we can have a proper democratic debate about where they should go.
Why should only councillors be allowed to see these maps and not residents, who will be the ones who ultimately feel the effects of these decisions?"