My Suprise lilies, aka naked ladies, Lycoris squamigera look like that also. You get leaves in the Spring and then the flower comes up late August.

If you have been there for three yrs I think you would have seen Dafs coming up in the Spring. Which makes me think that they are suprise lilies. If they were planted before you moved in they might not bloom for up to 3 years after planting.
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