Before the temple - This describes their position in a general way; more precisely they lay over against partly the “separate place” and partly the “temple-court” Ezekiel 42:1.
SDA Bible Commentary (limited)
Volume 1-7
8. Length of the chambers. Some take this to be the measurement of a shorter block of chambers (85 ft.; 25.9 m.) paralleling the longer block and separated from the longer block by the “walk” mentioned in v.4. This has not been indicated on the diagram (p. 716) because the description is not full enough to clarify the details of the plan.