Mechanical penthouses shelter the building’s elevator and other mechanical equipment that is generally located on the roof. The excellent quality represents a full intermediate mechanical-utility floor found in large high-rise construction. For finished penthouses, i.e., those containing roof apartments, restaurants, use the proper costs for that occupancy.
Note: Exterior wall choices are not available for this occupancy.
Availability of Elevators by Area for this occupancy: No
Marshall Valuation Service sections: 15 and 45.
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Class |
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Quality |
A |
B |
C |
D |
H |
M |
P |
S |
W |
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Low |
50 |
50 |
45 |
40 |
-- |
-- |
-- |
40 |
-- |
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Average |
55 |
55 |
50 |
45 |
-- |
-- |
-- |
45 |
-- |
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Good |
60 |
60 |
55 |
50 |
-- |
-- |
-- |
50 |
-- |
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Excellent |
60 |
60 |
55 |
50 |
-- |
-- |
-- |
50 |
-- |
Class A (Fireproof Structural Steel Frame) and Class B (Reinforced Concrete Frame):
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Quality |
Exterior Walls |
Interior Finish |
Mechanicals |
HVAC |
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Low |
Low-cost panels, masonry, very plain |
Unfinished interior, roof access only |
Minimum lighting, floor drains |
None |
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Average |
Curtain panels or masonry, steel roof deck |
Unfinished equipment and storage, few partitions |
Exposed lighting, adequate drains |
None |
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Good |
Good curtain panels, masonry, louvers, concrete roof |
Mechanical and storage, some finish and partitions |
Adequate lighting, utility outlets and drains |
None |
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Excellent |
Louvers, best curtain wall panels, matching spandrel |
Intermediate full mechanical floor, utility space, some storage |
Adequate lighting, utility outlets and drains |
None |
Class C (Masonry Bearing Walls), Class D (Wood or Steel Framed Exterior Walls) and Class S (Metal Frame and Walls):
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Quality |
Exterior Walls |
Interior Finish |
Mechanicals |
HVAC |
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Low |
Light frame or stud single wall, low-cost metal, stucco or siding |
Unfinished interior |
Minimum lighting, floor drains |
None |
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Average |
Frame or bearing walls, good panels, louvers or masonry, trim |
Unfinished equipment and storage, few partitions |
Exposed lighting, adequate drains |
None |