The first is for a detached house in the front garden of a house near Wigan. Even though the new government has taken away the brownfield status of domestic gardens to prevent 'garden grabbing' by developers this is by no means a adversion against development.
Each indiviual application will be judged on its own merits and so long as the garden is big enough to support the dwelling and it's associated amenity space and the apparent density of the dwelling(s) is in keeping with the local area then you should be in with a good chance of getting planning permission.
The second pre-application enquiry is for a substantial single storey rear extension in Culcheth. Normally with most single storey extensions it is straight forward what you are likely to get planning permission for but as this is a substantial extension and quite close to a boundary the the client and I felt it was worth just checking with Warrington Borough Council before I commit to preparing the full drawings.