Keighley MP Ann Cryer has demanded a housing trust reveal its long-term financial plans.
She wants to check the trust can afford promised improvements to run down homes in Woodhouse.
Bradford Community Housing Trust has refused to let Mrs Cryer examine its 30-year strategy.
A Freedom of Information request to the Government's Housing Corporation to see the strategy was also turned down.
Mrs Cryer now wants housing trusts to be included in the organisations that must comply with the Freedom of Information Act.
Speaking in the House of Commons this month she blasted the "total lack of democratic accountability" of housing trusts.
The wrangle is the latest episode in Mrs Cryer's campaign for improvements on the Woodhouse estate.
Each house needs an estimated £45,000 of repairs to tackle problems, including woodworm, warped floors and buckling walls.
The trust, which runs thousands of former council houses in Keighley, is currently consulting residents about possible solutions.
These include major refurbishments - which could total £9 million - or demolishing the houses and building new ones. Mrs Cryer fears the housing trust - which has an annual turnover of around £60 million - cannot afford the improvements.
The trust's published accounts show that it finished the last financial year with a £8 million deficit.
A spokesman for the Bradford housing trust said the Woodhouse improvements would be funded through the trust's existing investment budget.
He said the 30-year business plan could not be publicised because it contained commercially sensitive information.
He said: "The plan has been fully approved by the regulator, the Housing Corporation, external auditors and valuers as being robust and deliverable.
"It is normal for a stock transfer association to be making financial deficit in the early years and this is fully acceptable to the Housing Corporation."
The spokesman added that last year the trust was awarded "green lights" for its financial viability, housing management and the way it was governed.
Harriet Harman, the deputy Labour leader, this month told Mrs Cryer that the Government regarded the accountability of housing trusts as important.
She said a new housing bill could be introduced in the next parliamentary session to deal with issues such as tenants' rights.
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