Whose house the poet was leaving?

The poet in this poem is leaving her parents' house. This can be inferred from the context of the poem and the specific details mentioned by the poet.

Poem Context
The poem describes the poet's departure from a familiar place, which she refers to as "home." She talks about leaving behind the memories and emotions associated with this place. The poem also highlights the sense of loss and nostalgia she feels as she moves on from this familiar environment.

Specific Details
The poet mentions various elements that indicate she is leaving her parents' house. These details include:

1. "The familiar room" - This suggests that the poet is leaving a space that she is intimately familiar with, a room in her parents' house.

2. "The family photographs" - Family photographs are usually displayed in a house, often capturing memories and moments shared with loved ones. This reinforces the idea that the poet is leaving her familial home.

3. "The roof overhead" - The poet refers to the roof, which symbolizes the shelter and protection provided by a home. It implies that the poet is leaving the place where she was raised and had a sense of security.

4. "The garden beyond" - The mention of a garden further suggests a residential setting, typically associated with a house rather than an apartment or other types of dwellings.

Conclusion
Considering the context of the poem and the specific details mentioned, it can be concluded that the poet is leaving her parents' house. The poem explores the emotions and memories associated with leaving a childhood home and the transition to a new phase of life.