Plans to demolish a garage and replace it with a pair of three-bedroom homes are among those being considered.
All of the applications were received by Havering Council between November 14 and November 20.
The plans will be reviewed by the council before any final decisions are made.
In Romford, two new semi-detached three-bedroom homes could be built. The plans for Mawney Road would see an existing garage demolished to make way for the new development.
Plans (P1677.23) also request permission to carry out associated landscaping as well as create car parking, cycle storage and refuse storage.
Extensions proposed to properties in Romford include applications in Havering Road (Y0291.23), Larchwood Close (Y0294.23) and David Drive (P1669.23).
One applicant has asked to build an outbuilding at a property in Kingston Road (P1684.23). If approved it would be used as a gym and for storage.
A family living room could be created from an internal garage at a property in Balgores Lane (P1543.23).
Over in Tweed Glen, a loft conversion and rear dormer is planned for one property (P1694.23).
In Lake Rise, one applicant has asked to build a new roof lifted to the existing house loft floor level to extend the first floor (P1685.23).
A garage conversion to create a bedroom and internal reconfiguration of a property in Heath Drive is planned (P1614.23).
Ground and first floor extensions as well as a loft conversion could be added to a property in Thameshill Avenue (P1688.23).
In Upminster, there are also plans for a variety of extensions to existing properties.
Single storey extensions are planned for properties in Courtenay Gardens (P1675.23), Lime Avenue (P1507.23) and Sunnings Lane (P1597.23).
A separate application for the same property in Lime Avenue also proposes a single-storey annex building (P1509.2).
Alongside a single-storey rear extension in Derby Avenue, the applicant has asked for permission for a loft conversion (P1693.23).
A two-storey extension and internal reconfiguration of two properties in Convent Close is planned (P1577.23).
In Branfill Road, an application has been submitted for a garage extension and loft conversion (P1689.23).
In Hornchurch, a kitchen showroom could be created at the site of a makeup artist training academy in Butts Green Road ( P1690.23).
There are also plans to convert a vacant shop building into a home in Abbs Cross Lane (J0041.23).
Extensions in Hornchurch are planned for properties in Ambleside Avenue, Cranham Road (Y0293.23), Wingletye Lane (P1680.23) and Glanville Drive (P1682.23).
An application for an extension in West Malling Way also seeks permission for a garage conversion (P1634.23).
In Nelmes Way, one applicant has asked to build an outbuilding and gazebo in their rear garden (P1692.23).
An existing outbuilding in Allen Road, Rainham, could be used as a residential annex if planning permission is granted (P1696.23).
A single-storey rear extension is also planned in South End Road (Y0290.23).
Detailed documents on every application can be found on council's website: https://www.havering.gov.uk/info/20034/planning/116/planning_searches/5
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