70x80x18 Metal Building
5,600 Sq Ft Metal Building Size, Cost, Uses & Specifications
A 70x80x18 metal building provides a 5,600 square foot footprint with an 18-foot eave. Use this independent guide to compare real-use fit, floor planning, cost, clearance, concrete, steel building considerations and barndo potential before requesting quotes.
Floor Area
Width
Length
Eave Height
Planning Kit Range
What Fits in a 70x80x18 Metal Building?
Use the footprint first. Height determines the kind of doors, lifts, racks and tall equipment that remain practical.
Strong commercial, fleet and equipment building size
Supports multiple vehicles with dedicated circulation and service zones.
Useful for tractors, implements and protected equipment staging.
Creates enough area for repair bays, tools, parts and support functions.
Can divide receiving, inventory and operating space without immediately crowding the floor.
Fleet + Service
Keep frequent-use vehicles near access doors and reserve a separate repair or support zone.
Agricultural Storage
Coordinate large openings with equipment dimensions, turning paths and wall storage.
Small Warehouse
Use defined aisles and staging zones so stored inventory does not erode operating capacity.
How This Metal Building Behaves in Daily Use
Fleet, equipment, agricultural, contractor, service, warehouse and commercial shop layouts with distinct operating zones.
Operational zoning
5,600 square feet is large enough to separate vehicle, work, inventory and support functions.
Circulation loss
Aisles, loading, racks and safety clearances can consume substantial floor area before equipment is parked.
Frame and doors
Coordinate structural bays, large openings and the operating path as one system before final pricing.
70×80 Metal Building Layouts and Floor Plans
This conceptual floor plan shows one practical way to organize the footprint while preserving circulation, storage and a clear primary work or vehicle zone.
Primary bay
Keep the largest uninterrupted rectangle open for vehicles, equipment, material movement or the main workshop activity.
Storage wall
Concentrate cabinets and shelving on one side so circulation and the main operating zone remain predictable.
Door strategy
Confirm the real openings before fixing wall position, framing, overhead doors or large-equipment access.
70x80x18 Metal Building Cost
Kit pricing is only one part of a finished project. Use the kit number as a planning anchor, not a building quote.
$44,800-$72,800
Footprint-level planning reference for the metal building kit. Height, loads, openings, freight, erection, slab and location can change the actual quote.
$44.8K-$72.8K
Site specific
Variable
Scope specific
Optional
REALITY
CHECK
Could a 70x80x18 Metal Building Work as a Barndominium or Barndo?
This footprint gives a barndominium or barndo plan enough area to separate living quarters from a serious shop, garage, RV bay or equipment zone. Larger shells increase the importance of HVAC zoning, fire separation where required, plumbing runs, structural coordination and the cost of finishing residential square footage. The tall eave creates substantial vertical flexibility, but residential finishing, HVAC volume and structural requirements increase with height.
Is an 18-Foot Eave Height Enough?
Compare the current eave with adjacent metal building eave heights before you lock in doors, lifts, racking, storage or tall equipment.
Doors first
Specify the tallest vehicle or equipment and the required clear opening before treating the eave as sufficient.
Overhead clearance
Lifts, racks, mezzanines, lights and mechanical systems all compete for vertical space beneath the frame.
Height has cost
An 18 foot eave moves into taller commercial and warehouse planning. Height research models roughly 18% to 27% above a comparable 12 foot eave before project-specific engineering.
What Makes This Exact Building Size Different?
The steel building footprint stays the same if you change only eave height, but usable volume, door options and equipment compatibility can change substantially.
Side-to-side planning
Red iron rigid-frame construction is a strong planning baseline. Width controls clear span, door layout and the amount of circulation left beside equipment.
Useful working depth
Length determines how easily parking, work cells, inventory, staging or support rooms can be separated without blocking the main path.
Vertical envelope
The eave creates about 100,800 cubic feet through the wall height before the roof volume is added.
70x80x18 Metal Building Dimensions
Two simple views make the footprint and eave relationship immediately understandable.
Concrete, Roof, Wall and Volume Calculations
Planning math is useful for comparison, but final structural and concrete requirements must follow engineered plans and local conditions.
5,600 sq ft
300 linear ft
100,800 cu ft
About 69.1 cu yd
Compare 70×80 Metal Building Sizes
Compare nearby metal building sizes to see how changes in footprint and eave height affect usable space, clearance, storage and typical applications.
5,600 sq ft
Less vertical envelope while floor area stays unchanged.
5,600 sq ft
The exact width, length and eave combination shown on this guide.
5,600 sq ft
Adds wall and enclosed volume without increasing the slab footprint.
7,000 sq ft
Changes usable floor area while keeping a comparable eave height.
Common Buying Mistakes for a 70x80x18 Metal Building
Avoid these common planning mistakes before comparing kits, foundations, door packages and contractor quotes.
The quoted eave is not the same as the usable door opening or the clear ceiling under the frame. Size the tallest vehicle, rack or lift first, then verify the engineered opening and frame depth.
A floor can hold more vehicles than it can move independently. Doors, aisles, trailer swing, workbenches and wall storage decide whether the building functions well after it fills up.
Kit pricing normally excludes some combination of slab, freight, erection, doors, insulation, electrical work, site work and permits. Compare quote scopes line by line.
The geometric concrete math on this page is useful for scale, but the engineered foundation can add footings, grade beams, piers, thickened edges and reinforcement.
Before You Request a 70x80x18 Metal Building Quote
Have these decisions ready so quotes are easier to compare and less likely to hide major scope differences.
70x80x18 Metal Building FAQ
Quick answers to common questions about dimensions, capacity, eave height, barndo fit and concrete planning.
What does 70x80x18 mean for a metal building?
It describes a building approximately 70 feet wide, 80 feet long and 18 feet at the eave, creating a 5,600-square-foot nominal floor area.
How much floor area does a 70×80 metal building provide?
The nominal floor area is 5,600 square feet because 70 feet multiplied by 80 feet equals 5,600. Eave height changes the vertical envelope, not the slab area.
Is 18 feet tall enough for this metal building?
It depends on the use. Eave height is not the same as clear door or clear ceiling height, so tall vehicles, lifts, racks and equipment should be checked against the engineered opening and frame depth.
Can a 70×80 building be a barndominium or barndo?
Large barndominium or shop-house footprint with room for distinct living and work zones. The tall eave creates substantial vertical flexibility, but residential finishing, HVAC volume and structural requirements increase with height.
How much concrete is needed for a 70×80 slab?
A simple 4-inch slab is about 69.1 cubic yards before waste, thickened edges, footings, grade beams, piers or engineered foundation adjustments.
How These Metal Building Measurements and Cost Ranges Are Calculated
For a 70x80x18 metal building, the 70-foot width, 80-foot length and 18-foot eave create 5,600 square feet and about 100,800 cubic feet through the eave, a commercial or agricultural envelope where equipment movement and operating aisles should be priced with the shell. Because the footprint is near-square, compare end-wall and sidewall door schemes; large openings can consume prime wall area needed for utilities, storage or support rooms. At an 18-foot eave, verify engineered clear openings and quote tall doors, lifts, racks or mezzanine concepts against actual frame and mechanical clearance, not nominal wall height. Ask suppliers to itemize foundation assumptions, freight, erection, bracing, large framed openings and local design loads, because two 70x80x18 steel building quotes can share nominal dimensions while representing materially different finished scopes and total project costs.
Width x length
2 x width + 2 x length
Footprint x eave height
Area x slab thickness