Loading /Lazy loading of related entities

Scenario:

I have a (major) design problem. I have DTO classes to fill data from DB and use in the UI. The scenario I have is that:

I have a HouseObject which has TenantObject (one to many) with each tenant has AccountObject (one to many again) and so on (Example Scenario Only)

Problem:

Now my issue is, while retrieving data from DB for HouseObject, Should I get list of all TenantObjects and inturn list of all AccountObjects and so on? because of the one to many relationship, for one HouseObject potentially we are retrieving huge data for Tenants, Accounts and so on.

Should we just retrieve just HouseObject and fire off individual dependent queries per dependency? or should I get all data at once in single call and bind it on screen. Which is the desired solution?

Please advice.