Building Types
80x100 Steel Auto Repair Shop
- Width
- 80 ft
- Length
- 100 ft
- Floor area
- 8,000 sq ft
- Perimeter
- 360 ft
Configuration
How This Building Is Configured
Configuration summary
| Building type | Auto Repair Shop |
|---|---|
| Footprint | 80 ft × 100 ft |
| Floor area | 8,000 sq ft |
| Eave height | 20 ft |
Example
Example Configuration
Quick dimensions
At a Glance
Width
80 ft across the gable end.
Length
100 ft along the sidewall.
Floor area
8,000 sq ft of clear floor.
Eave height
20 ft at the sidewall on the stored profile.
Access
Doors & Access Considerations
Opening width
Across a 80 ft gable end, the practical opening width is limited by the frame and confirmed with the supplier.
Opening height
A 20 ft eave sets the ceiling on door height before any frame change.
Drive-through
Matching openings at both ends avoid reversing, at the cost of usable wall.
Use
How a 80×100 Auto Repair Shop May Be Used
Machine layout
Stationary machines need infeed and outfeed clearance, which drives usable length more than area.
Assembly space
An open central floor is commonly kept free so material can be moved and assembled.
Dust and finishing
Separating a finishing area from cutting is a common planning decision at larger footprints.
Material storage
Long stock storage along one wall affects how the door openings are positioned.
Planning
Footprint & Space Planning
Footprint
Width and length are chosen together: width is usually fixed by what has to fit side by side, length by how many bays are needed.
Height
Eave height affects door options, storage height and how open the interior feels.
Access
Where vehicles and people enter changes the whole interior layout, so access is settled before anything else.
Doors and openings
Opening width, height and position are specified with the supplier; they affect the frame and the wall bracing.
Site
Slope, drainage, access for delivery and erection, and the foundation are confirmed for the actual property.
Expansion
Extending along the length is usually simpler than changing the width later, which is worth deciding up front.
Similar sizes
Other Sizes for a Auto Repair Shop
80′ × 80′
6,400 sq ft
80′ × 120′
9,600 sq ft
70′ × 100′
7,000 sq ft
Related
Related Building Types
Example configuration — for planning purposes only.
FAQ
Common Questions
80 ft × 100 ft is 8,000 square feet of floor area before any interior partitions.
Length is usually adjusted in bay increments, and width is a larger design change. Both are confirmed with the supplier for the final design.
Site preparation, foundation and erection are commonly quoted separately from the building package. Confirm the scope of any quote you receive.
Compare nearby sizes
Related footprints for this building type
Each page works through one footprint for one building type.
Cost drivers
Quantities that move the estimate at 80x100
Quantities, not prices, are publishable here: roof cladding runs 8,433 square feet — 5% above the 8,000-square-foot floor at a 4:12 pitch — with 148.1 cubic yards of nominal slab beneath it. Where the building sits on the site changes how much of this floor is genuinely reachable.
Per service bay this footprint carries about 533 square feet of enclosed floor against a 392-square-foot module. That ratio, not the total, says whether 80x100 is efficient for a auto repair shop. Snow, wind and site exposure change what this shape costs to build long before the interior plan does.
- the number of bay openings
- eave height driven by lift travel
- exhaust extraction and air distribution
- separating a customer area from the working floor
Overview
A 80x100 auto repair shop planned as staged shop with room to grow
This page is ordered around height and clearance, because at 80x100 the 20-foot eave limits a auto repair shop sooner than the plan does.
The footprint holds 15 service bays — 5 across by 3 deep — and the remaining 4 feet is marginal: the leftover is too small to hold as a staged zone and should be absorbed into the working floor.
What distinguishes 80x100 is depth behaviour: 3 rows along 100 feet after 12 feet of circulation, with 4 feet unaccounted for at the end of the run. Cleaning, maintenance and inspection all need reach, and reach is planned in the gaps rather than in the modules.
The footprint is larger than the current bay count needs, and that is deliberate. Bays are fitted out in stages while the shell is built once, which is the cheapest way to buy capacity that does not exist yet. With 8,000 square feet arranged 80 wide by 100 long, which is what fixes the number of service bays available that judgement is a different one than at an adjacent footprint. Tire, fluid and waste storage is a code and housekeeping matter that quietly consumes a corner of the floor. The waiting customer and the moving vehicle want separated routes, and the separation has to exist outside the building as well as inside it.
This footprint is planned as staged shop with room to grow. At 80 by 100 feet — 8,000 square feet on a 1.25 to 1 plan — Circulation has to be planned for the finished shop rather than the first stage, because a lane retrofitted through a working floor is the change nobody executes cleanly.
Areas, perimeter, roof area, ridge height, slab volume and the service bay counts on this page are computed from the stored 80x100 record and this platform's planning module for the auto repair shop category.
Height
Interior height for a 80x100 auto repair shop
Span drives headroom at 80x100: 80 feet of width on a 4:12 pitch puts 33.3 feet over the middle and 20 feet at the walls, so where a tall item stands matters as much as how tall it is. Access, not area, is what makes a plan feel small once it is in use.
Work zones in the first stage are generous, since the unfitted area absorbs overflow until it is claimed by the next stage.
Ventilation across 8,000 square feet at this height: running engines and finishing work mean exhaust extraction and general air movement are planned, not improvised.
Clear height below purlins, bracing and lighting is lower than the eave height. The usable figure comes from the manufacturer's framing for the selected building.
Usable area
How the 8,000 square feet divides at 80x100
Computed service bay fit for a 80x100 auto repair shop
| Measure | Computed at this footprint |
|---|---|
| Service bays across the 80-foot width | 5 at a 14-foot module |
| Leftover width | 10 ft (1,000 sq ft as a full-length strip) |
| Rows along the 100-foot length | 3 at a 28-foot module after 12 ft of circulation |
| Leftover depth | 4 ft (320 sq ft across the width) |
| Total service bays | 15 |
| Share of floor committed | 74% |
Module footprint used here is 14 by 28 feet, this platform's planning module for a auto repair shop. It is not a code minimum or an engineered clearance.
Example allocation of the 100-foot length — planning model, not survey data
| Zone | Length along the building | Computed area |
|---|---|---|
| Work zone and benches | 45 ft | 3,600 sq ft |
| Machine and assembly floor | 35 ft | 2,800 sq ft |
| Material storage | 20 ft | 1,600 sq ft |
Shares applied to the stored 100-foot length; areas computed against the 80-foot width.
Module footprints and allocation shares come from this platform's use typology and are published as example planning models. They are not recommendations and do not describe a majority of projects.
Allocation
Dividing the floor for staged shop with room to grow
The office is positioned for the final layout, even where that leaves it oddly placed on day one. The parts room is sized for the finished shop from the start, because moving it later disrupts every bay it serves. With 8,000 square feet arranged 80 wide by 100 long, which is what fixes the number of service bays available that judgement is a different one than at an adjacent footprint. Seasonal peaks — tire changes, inspection deadlines — are what the plan should absorb, not the weekly average.
There is no end zone at this footprint. 4 feet is circulation slack, not floor area with a purpose, and the leftover is too small to hold as a staged zone and should be absorbed into the working floor. A building that cannot be reversed out of is a building that gets used in one direction only.
Spare width is the more valuable of the two leftovers here: a continuous 10-foot strip beats the same area stranded at the end of the run, because it touches every position along the way. Noise from this floor reaches the office, the neighbours and the yard, and separation is a plan decision.
At 80 by 100 feet — 8,000 square feet on a 1.25 to 1 plan — Circulation has to be planned for the finished shop rather than the first stage, because a lane retrofitted through a working floor is the change nobody executes cleanly. That movement pattern, not the 8,000-square-foot total, is what decides whether the leftover 4 feet is useful here.
Openings
Openings for 5 service bays across
One opening per position works on this gable: 5 across 80 feet, with 10 feet of wall to distribute as piers. Splitting that margin evenly is what keeps the elevation buildable. Set the openings before the interior, because the openings cannot move and the interior can.
Whether a through route ever appears depends on which end is built out last, so the door position is worth deciding before the first slab is poured.
Framed-opening sizes, headers and the structure around them are engineered for the specific building. Confirm every opening with the door supplier and the building manufacturer before ordering.
Configurations
Configuring 15 service bays at 80x100
At 25-foot nominal bays the structure works with the layout instead of against it: one service bay per bay line, walls free of awkward half-positions. Temperature swing on a steel shell drives condensation decisions that outrank most layout preferences.
Two-plus rows change the access question entirely. Every rear position at 80x100 needs either its own opening or an aisle, and 10 feet of spare width is what that aisle has to come from. The count of working positions, not the headline area, is the figure that survives contact with the operation.
Expansion is internal rather than structural: the building already exists, and each stage is fit-out, services and equipment. With 8,000 square feet arranged 80 wide by 100 long, which is what fixes the number of service bays available, added capacity is counted in service bays.
The parts room is sized for the finished shop from the start, because moving it later disrupts every bay it serves.
Configured as staged shop with room to grow, 80x100 is judged on whether the 15 service bays it holds match the operation, and on whether the 10 feet of spare width leaves the route this mode depends on.
- Does the work need racking or work zones on both sides with a full vehicle lane down the middle, or does it need a second lane that this 80-foot span cannot give?
- Is the 100-foot length being bought for depth, or for the repeated bays — eight to ten repeated bays, which makes the layout a scheduling problem as much as a spatial one?
- How many bays need their own door for the shop to run at the pace you plan?
- Does the eave height clear a vehicle at full lift travel, not just at ride height?
Bay division shown here is a planning module computed from the stored length. Actual bay spacing is set by the manufacturer's frame design for the building.
Comparison
What changes at adjacent footprints
Computed comparison of nearby footprints for a auto repair shop
| Footprint | Floor area | Service bays |
|---|---|---|
| 40x80 | 3,200 sq ft | 6 (3 x 2) |
| 60x60 | 3,600 sq ft | 4 (4 x 1) |
| 50x80 | 4,000 sq ft | 6 (3 x 2) |
| 40x100 | 4,000 sq ft | 9 (3 x 3) |
| 60x80 | 4,800 sq ft | 3 (3 x 1) |
Areas computed from each stored size record; service bay counts computed with the same 14 by 28 foot planning module.
- 40x80 moves the count from 15 to 6 service bays (3 across by 2 deep), which is the reason to choose between them.
- 60x60 moves the count from 15 to 4 service bays (4 across by 1 deep), which is the reason to choose between them.
- 50x80 moves the count from 15 to 6 service bays (3 across by 2 deep), which is the reason to choose between them.
Nearby footprints read for a auto repair shop: exact change in area and in planning service bays
| Footprint | Area Δ | % Δ | Service bays at that footprint | What changes for this use |
|---|---|---|---|---|
| 50x150 | −500 sq ft | −6.2% | 12 (3 x 4) | −3 service bays on the same planning module. |
| 60x150 | +1,000 sq ft | +12.5% | 12 (4 x 3) | −3 service bays on the same planning module. |
| 80x120 | +1,600 sq ft | +20% | 20 (5 x 4) | +5 service bays on the same planning module. |
| 80x80 | −1,600 sq ft | −20% | 10 (5 x 2) | −5 service bays on the same planning module. |
Areas are arithmetic on two stored size records; service bay counts use this platform's 14 by 28 foot planning module and are not a capacity statement.
Because this footprint is planned as staged shop with room to grow, the useful next reads are different from the ones a differently shaped auto repair shop suggests: phased shop build, shop expansion planning, shell and fit-out strategy.
Visualization
Reading the 80x100 footprint as a auto repair shop
FAQ
Questions about 80x100 auto repair shop projects
Length here buys 3 rows and 4 nominal bays; width buys 5 positions side by side. At this aspect ratio both dimensions are still adding usable positions.
Often, because the shell, slab and roof are the elements most disrupted by a later addition. Whether it is cheaper on a specific project depends on quoted scope and on how long the unfinished area sits idle.
Expansion means more bays along the length, each with its own opening, rather than a deeper floor Practically, the 100-foot dimension is the one that extends; the 80-foot span is fixed once the frames are set.
Circulation, service routes and the door positions. Everything else can wait; those three are the decisions that a later stage cannot undo without touching the working floor.
Not enough for a planned room at this footprint: the leftover is too small to hold as a staged zone and should be absorbed into the working floor.
Methodology
How this page was produced
Sources and methodology
Find Steel Buildings dimensional records
Find Steel Buildings · Primary platform dataset · Tier 1 — code authority, standards body, primary dataset or manufacturer engineering
Supports: Stored nominal width, length, eave height, roof pitch and slab thickness for this subject.
International Building Code and International Residential Code
International Code Council · Model code · Tier 1 — code authority, standards body, primary dataset or manufacturer engineering
Supports: The framework of adopted codes and local amendments that decides permitting, separation and opening requirements. Cited as the governing framework, never as a local requirement.
- Dimensional figures: Width, length, eave height, roof pitch and nominal slab thickness come from this platform's stored record for the subject. Floor area, perimeter, wall area, roof area, ridge height and slab volume are computed from those inputs rather than transcribed.
- Service bay fit: Counts, leftover strips and per-module areas are computed from the stored 80x100 record against this platform's 14 by 28 foot planning module for the auto repair shop category, with 12 feet allowed for circulation. The module is editorial planning typology, not a code minimum or an engineered clearance.
- Allocation model: Zone shares come from this platform's use typology for workshop and hobby space and are applied arithmetically to the stored 100-foot length.
- Allocation and layout models: Layout splits are arithmetic on the stored footprint, published as example allocation models. They are not survey findings and do not describe what buyers most often choose.
- Clearance and opening guidance: Clearance and opening statements are planning guidance. Final dimensions depend on the selected door system, header detail and the manufacturer's engineering for the building.
Methodology notes
- Prices: No price figure appears on this page. Cost data is published on this platform only with a documented inclusion basis, a collection date and a named source.
Drawn to scale
Plans and dimensions
Every drawing below is generated from the exact dimensions for this building, so proportions and areas are accurate.
Continue your research
Related planning topics
Background reading on the questions this page raises. None of these pages sells anything.
Compare 80x100 auto repair shop configurations
Review the allocation models for this footprint side by side, then estimate the configuration you intend to build.