It hopes to sign up to six contractors to carry out responsive and planned housing, costed at about £25m over the duration of the framework deal.
The council owns 4,800 homes with a further 1,100 leasehold flats. Also included in the package of work will be several schools, offices and a range of public buildings.
The work is being broken down into four lots:
Interested firms need to register on the e-portal: https://harrow.bravosolution.co.uk by 7 November.