I grew up in Temple City as a child...right around the corner from Pal Mal on Olive Street. I know the area very well!
Without knowing the condition and size of both the home and garage/apartment it is an assumption that this sounds about right...maybe somewhat low given the property size. The average for the Temple City area is hovering right around $600,000.
If you have any other questions I can answer or be of assistance in selling this property for you, please do not hesitate to email or call me directly.
Thank you and have a great day!
Axiom Real Esate