One 40ft or two 20ft containers
One standard 40ft offers 304.6 sq ft of bare-shell internal area. Two 20ft provide 299.2 sq ft, slightly less than a single 40ft: placed end to end, they count the walls and end doors twice.
Container home · Layouts and floor areas
Container home designs and layout ideas
Compare container home designs by the rooms you need, the module size and the arrangement on your plot. These container home plans are layout studies, not approved building plans. Choose the number of containers and levels to calculate bare-shell internal area and ground footprint, then develop the finished rooms, insulation, services, stairs and access under the adopted code and local ordinances.
Once you have found your configuration, request quotes: describe your project and compare any quotations received. Supplier participation and the number of responses are not guaranteed. ContainerFox does not build or sell homes.
- A 40ft container: bare-shell internal area
- 304.6 sq ft
- For 1,076.4 sq ft of bare-shell internal area
- 4 × 40ft or 8 × 20ft
- 4 × 40ft on two levels
- 639.4 sq ft footprint
Bare-shell internal area before insulation; not a finished dwelling area or space-standard assessment.
Calculate the space for your container home plans
20ft or 40ft module, from 1 to 12 containers, single-story or two-story: the calculation gives bare-shell internal area, volume and footprint. It does not calculate a permission exemption, finished room layout or compliance with a dwelling space standard.
Calculated areas
4 containers of 40ft standard, single-story, modules side by side. These dimensions do not establish zoning compliance or building-permit approval.
- Bare-shell internal area
- 1,218.5 sq ft
- Ground footprint
- 1,279.8 sq ft
- Internal volume
- 9,563.2 cu ft
Buy the 4 containersPrepare for installation and delivery
Request a free, no-obligation quote: the selected format and quantity are carried over into the form. ContainerFox does not build or sell container homes.
Planning and building checks
These figures describe container geometry before insulation and partitions. They do not determine permission. Check the site, intended use, design, adopted state or local codes, zoning and ordinances with the authorities responsible for zoning and building permits. Zoning and building permits
Your project, a clear brief.
Have a configuration in mind? Get competitive quotes.
Same number of modules, same floor area: the price of the containers, their conversion and installation differs from one professional to another. Compare any quotations received against the same scope, specification and exclusions.
Independent supplier matching service, free for the requester.
- One detailed project request.Describe your project once and compare any quotations received. Supplier participation and the number of responses are not guaranteed.
- Comparable prices, line by line.Containers, conversion, transport, lifting and installation priced separately: you see where the difference lies, and you can negotiate.
- Free and without obligation.You compare, then choose freely. ContainerFox neither builds nor sells homes.
How many containers for your target floor area?
For a home of 1,076.4 sq ft bare-shell internal area, you need 4 40ft containers (1,218.5 sq ft) or 8 20ft containers (1,194.8 sq ft), before insulation and partitions. The table shows the smallest number of modules that reaches each floor area.
| Target area | 40ft standard | 20ft standard |
|---|---|---|
| 430.6 sq ft | 2 containers609.2 sq ft bare-shell area | 3 containers447.8 sq ft bare-shell area |
| 645.8 sq ft | 3 containers913.9 sq ft bare-shell area | 5 containers747 sq ft bare-shell area |
| 861.1 sq ft | 3 containers913.9 sq ft bare-shell area | 6 containers896.6 sq ft bare-shell area |
| 1,076.4 sq ft | 4 containers1,218.5 sq ft bare-shell area | 8 containers1,194.8 sq ft bare-shell area |
| 1,614.6 sq ft | 6 containers1,827.7 sq ft bare-shell area | 11 containers1,642.6 sq ft bare-shell area |
The 40ft High Cube gives the same number of modules as the standard 40ft for each of these floor areas: its extra height does not create additional floor area (304.6 sq ft of bare-shell internal area per module).
And for a small container home of about 215.3 sq ft: 1 × 40ft container (304.6 sq ft) or 2 × 20ft containers (299.2 sq ft); a single 20ft offers 149.6 sq ft.
Home of 2, 3, 4, 5 or 6 containers: areas and footprints
| Configuration | Bare-shell internal area | Single-story footprint | Two-story footprint |
|---|---|---|---|
| 2 × 40ft | 609.2 sq ft | 639.4 sq ft | 319.7 sq ft |
| 3 × 40ft | 913.9 sq ft | 960.1 sq ft | 639.4 sq ft |
| 4 × 40ft | 1,218.5 sq ft | 1,279.8 sq ft | 639.4 sq ft |
| 5 × 40ft | 1,523.1 sq ft | 1,599.5 sq ft | 960.1 sq ft |
| 6 × 40ft | 1,827.7 sq ft | 1,919.2 sq ft | 960.1 sq ft |
These are bare-shell internal areas: internal length × width of the containers, before insulation, partitions, cut-outs and reinforcements. The finished habitable area is calculated on the project plan. The number of bedrooms depends on that plan: this page does not state any.
20ft, 40ft or High Cube?
The dimensions of each size remain on their pages. Three comparisons are enough to choose the module for a home.
Standard or High Cube
Same bare-shell floor area per module (304.6 sq ft), but 1 ft more internal height on the reference models: 2,694.5 cu ft instead of 2,390.8 cu ft per module.
Fewer modules to install
For 1,076.4 sq ft of bare-shell internal area: 4 40ft modules or 8 20ft modules, i.e. 4 more modules to deliver, lift and connect together.
Transport and unloadingContainer home designs: single-story, L-shaped, U-shaped or two-story
The bare-shell internal floor area depends only on the size and number of modules. The footprint depends on how they are placed. Compare each arrangement with the rooms, circulation and outdoor space you want; these diagrams show module positions rather than a finished room plan.
Side by side
Footprint: 1,279.8 sq ft
L-shaped
Footprint: 1,279.8 sq ft
U-shaped
Footprint: 1,279.8 sq ft
Two-story
Footprint: 639.4 sq ft
To help you visualise each shape: the top views above are the calculated plans; the illustrations below give an idea of the appearance, without plan value.
Single-story, L-shaped or U-shaped
Placed on the ground without overlapping, 4 40ft containers occupy 1,279.8 sq ft, in a line, L-shape or U-shape. The shape changes the site footprint (courtyard, passageways), the light and the number of walls to cut out to connect the modules. The builder's quote must describe these cut-outs and the planned reinforcements.
Two-story
Stacked in pairs, the same 4 modules keep 1,218.5 sq ft of bare-shell internal area for 639.4 sq ft of footprint. With an odd number, one extra module stays at the bottom: 3 containers on two levels occupy also 639.4 sq ft. Stacking requires checking the structure, supports and staircase.
Allow for the space lost inside the steel shell
Internal insulation, linings and services reduce clear width, area and headroom. The example below uses a rectangular 40ft shell and the same assumed build-up on each of its four walls; these thicknesses are geometric examples, not an insulation specification.
| Build-up at each wall | Clear internal width | Remaining rectangle |
|---|---|---|
| Bare shell | 7 ft 8.6 in | 304.6 sq ft |
| 3.9 in | 7 ft 0.7 in | 274.1 sq ft |
| 5.9 in | 6 ft 8.8 in | 259.1 sq ft |
| 7.9 in | 6 ft 4.9 in | 244.4 sq ft |
External insulation changes these geometry assumptions, but its thickness, roof detailing, boundaries and cladding still need to appear on the design and application drawings. A High Cube gives more initial height; it does not establish compliant finished headroom by itself.
US design check: use the local building-code requirements for the intended occupancy. Allow for clear room sizes, headroom, exits, stairs and access after insulation. Bare-shell dimensions cannot establish that a dwelling is approvable.
- Draw clear routes from the entrance to the living space, bathroom and other required facilities; account for raised floor level and external approach.
- Position sleeping rooms, exits and any stair with the fire strategy. Large side-wall openings and stacked modules need an engineered structural scheme.
- Reserve space for ventilation ducts, heating and hot-water equipment, drainage falls, service access and storage before declaring the room count.
- Assess daylight, solar gain, overheating, privacy and noise together. More glazing is not automatically a better home.
Zoning and building requirements
Container size alone does not determine permission. Ask the local authority about the actual site, proposed use, duration, access and protected status.
California
Planning. Ask the city or county about residential or accessory-dwelling use, zoning, setbacks, lot coverage, fire access, utilities and any coastal or other overlay. A storage approval does not authorize a dwelling.
Building approval. Use the applicable California Building Standards Code and local amendments. Establish whether factory work needs a separate state approval pathway and which drawings, engineering and inspections the local building department requires.
Texas
Planning. Confirm local zoning where applicable, deed restrictions, setbacks, floodplain status, water and wastewater. County and municipal powers differ; absence of a municipal zoning ordinance does not establish permission for every site.
Building approval. Ask TDLR whether the proposed off-site work is regulated industrialized housing or a building under its IHB program. Determine the state factory requirements and local site, foundation and installation responsibilities. Do not substitute a HUD label claim for this assessment.
Washington
Planning. Check zoning, dwelling use, setbacks, critical areas, flood conditions, access and servicing with the local authority. Confirm any land-specific or tribal jurisdiction rather than inferring it from the mailing address.
Building approval. Washington L&I regulates covered factory-built modular and mobile structures. Confirm whether the container conversion needs plan approval, inspections and an L&I insignia before shipment. The local building department still controls the relevant site and installation approvals.
Manufactured housing: a separate federal route
Planning. Ask the local authority whether the intended dwelling classification and location are permitted. A chassis, wheels or a seller's description alone does not establish the legal category or remove site requirements.
Building approval. HUD-regulated manufactured homes are constructed to federal standards within the statutory definition and certification system, including a permanent chassis. A repurposed shipping container does not automatically qualify. Modular homes and site-built conversions generally follow different state and local approval routes.
Other states and Washington, DC
Planning. Identify the city, county or other authority responsible for zoning, building, fire and public health at the project address. Establish jurisdiction separately for tribal and federal land; include floodplain, wetlands, septic and utility approvals where relevant.
Building approval. Find the adopted residential or building code, energy and trade codes, local amendments and any state modular-building program. The 2021 IRC's container structural provisions refer to IBC section 3115; the applicable edition and any alternative-method route must be confirmed locally.
Obtain a local building-code compliance schedule for the finished design. The detailed guide distinguishes published model codes from adopted editions and describes the evidence needed for completion.
Check local permit rules before finalizing your layoutUse the right area for the drawing and application
The calculator describes container geometry. The designer must measure the finished proposal using the definitions required for its planning application, applicable building calculations and any applicable space standard.
- Bare-shell internal area
- What this page calculates: internal length × width of each container, added together, before insulation, partitions, cut-outs and reinforcements. It is used to compare configurations.
- Ground footprint
- Calculated here from the external dimensions of modules placed without clearance or overhang. A canopy, a covered terrace or an offset between modules changes the actual footprint.
- Finished dwelling area
- Use the measurement method required by the permit authority and energy assessment. Distinguish overall module area, gross building area and the clear floor area remaining after insulation, partitions, structure and services.
Ask for dimensioned finished drawings, the area measurement method and room-by-room usable dimensions. Keep the bare-shell calculation separate from the zoning and permit area schedules.
Questions about container home floor plans
How many containers for a home of 1,076.4 sq ft?
For a home of 1,076.4 sq ft bare-shell internal area, you need 4 40ft containers (1,218.5 sq ft) or 8 20ft containers (1,194.8 sq ft), before insulation and partitions. The 40ft High Cube gives the same number of modules as the standard 40ft. This is an area before insulation, partitions and cut-outs: the floor area and the living area are calculated from the project plan, prepared and checked by the project designer.
Single-story or two-story container home: what changes?
The bare-shell internal area does not change: 1,218.5 sq ft for 4 40ft containers. The ground footprint changes from 1,279.8 sq ft on one level to 639.4 sq ft on two levels. Have the structure, supports and upper-floor access designed and checked by the qualified professionals required for the project. A manufacturer's sales layout does not replace the professional drawings and calculations required for approval. Zoning and permit requirements should be confirmed with the local planning authority.
Do you need High Cube or standard containers for a home?
On the reference models, a 40ft High Cube offers the same bare-shell floor area as a standard 40ft (304.6 sq ft before insulation) and 1 ft of extra internal height, i.e. 2,694.5 cu ft instead of 2,390.8 cu ft. This height leaves room to insulate the floor and ceiling. It does not change the number of modules needed for a given area.
The container home guide
Shipping container homes in the United States
Plan the plot, design team, construction scope and budget for a complete dwelling project.
ReadZoning, permits and site conditions
Check land-use approval, any required development approval and site conditions with the local planning authority.
ReadDelivering and lifting several modules
Truck access, lifting and drop-off point: what you need to get quoted.
Read40ft container
Dimensions, standard or High Cube, new or used.
ReadConverted shipping containers
Define the shell, openings, insulation and fit-out before requesting a project quote.
ReadUpdated · Guidance reviewed · No prices, no planning conclusions