# Shipping Container Home: Dimensions, Plans & Cost

Source: https://contsize.com/container-home-dimensions/ · CC BY 4.0 · checked 2026-10-19

A shipping container home is built from 20 ft boxes (13.9 m² / 149 ft² of inside floor each) or, far more often, 40 ft high cubes (28.3 m² / 305 ft² each, 2.698 m / 8′10″ inside height — about 2.5 m after 200 mm of floor build-up and ceiling insulation), the inside as most published sheets print it. The binding constraint is inside width: 2.352 m (7′8½″), which drops to roughly 2.202 m once insulated, so any room wider than a corridor-plus-bed means joining two boxes side by side. Containers stack corner-casting on corner-casting — ISO 1496-1 tests a box under 192,000 kg of loaded boxes above it — while offsets and wide openings need engineered steel. The cost table below adds up to $19,000–71,400 for a finished single 40 ft high cube home — the box itself, $2,100–5,600 from used to [one-trip](https://contsize.com/glossary/one-trip/), is only 8–11% of that — and a finished multi-box build commonly comes close to stick-built cost per square metre; the fit-out lines are builders’ estimates, not checked figures.

Every container home plan is an exercise in dividing two fixed rectangles: 5.898 × 2.352 m (a 20 ft box) or 12.032 × 2.352 m (a 40 ft box). The length is generous; the 2.352 m width — about 2.202 m after insulation — is what every layout fights. Understand that one number and most floor-plan decisions make themselves.

This guide works from the real inside dimensions, as most published line and maker sheets print them, not marketing renders: what actually fits in 13.9 and 28.3 m², when you must join or stack boxes, what each build stage costs, and which cuts in the corrugated shell demand an engineer. Builders overwhelmingly start from [40 ft high cube](https://contsize.com/40-ft-high-cube-container/) units — the 9′6″ height keeps ceilings livable (~2.5 m) after insulating floor and roof, where a standard 8′6″ box drops to 2.193 m.

**The fit-out costs in this guide are builders’ typical US ranges as of mid-2026, not figures checked against documents the way the container dimensions are; regional labor rates and seasonal demand shift them. Box prices, delivery and the ground under the box come from the [prices guide](https://contsize.com/shipping-container-prices/).**

![Top-view plan of an example home in one 40 ft high cube container, 12.032 m by 2.352 m inside, divided into a 3.2 m bedroom.](https://contsize.com/figures/shipping-container-home-floor-plan-en.png)

**The numbers in this chart**

*One 40 ft HC as a home — example layout*

| Zone | Length |
| --- | --- |
| Bedroom | 3.2 m |
| Bath | 1.8 m |
| Kitchen / living | 7.032 m |

*One 40 ft HC as a home — example layout Internal width 2.35 m before lining*

![Bar chart of usable floor area by container length, from 6.7 m² in a 10 ft to 40.3 m² in a 53 ft.](https://contsize.com/figures/shipping-container-floor-area-by-size-en.png)

**The numbers in this chart**

*Floor area inside each container size*

| Size | m² | ft² |
| --- | --- | --- |
| [10 ft container](https://contsize.com/10-ft-container/) | 6.7 | 72 |
| [20 ft container](https://contsize.com/20-ft-container/) | 13.9 | 149 |
| [40 ft container](https://contsize.com/40-ft-container/) | 28.3 | 305 |
| [40 ft high cube container](https://contsize.com/40-ft-high-cube-container/) | 28.3 | 305 |
| [45 ft high cube container](https://contsize.com/45-ft-container/) | 31.9 | 343 |
| [48 ft container](https://contsize.com/48-ft-container/) | 36.2 | 390 |
| [53 ft container](https://contsize.com/53-ft-container/) | 40.3 | 434 |

Checked 19 October 2026: the figures in this chart against 41 of 88 published sheets from 26 lines, lessors, makers and rail and road operators: those that print these figures. A sheet agrees within ±5 mm, or ±2 % for a mass and ±1 % for a volume; a maximum gross is a rating and must be the same. [Every figure and its sources](https://contsize.com/container-data-sources/)

*Floor area inside each container size*

## Floor-plan logic: what fits in 13.9 and 28.3 m²

Start with the two footprints. A **20 ft container** offers 5.898 × 2.352 m = **13.9 m² (149 ft²)** — one room. Realistic single-box programs: a studio (bed + kitchenette + shower room), a home office, or one module of a larger plan.

A **40 ft container** offers 12.032 × 2.352 m = **28.3 m² (305 ft²)** — enough for a genuine one-bedroom layout in a line. The example floor plan on this page draws it as three zones, each the full 2.352 m across:

- bedroom (3.2 m);
- bathroom (1.8 m);
- kitchen and living (7.032 m).

The width rules the plan. After 50–75 mm of insulation and lining per side, the clear interior is **2.202–2.252 m**. A standard double bed (1.9 m long) fits across the container with barely 0.3 m to spare, so beds almost always run across the box with a walk-past, or along one wall.

A corridor beside a room is impossible in one box: 0.9 m of hallway leaves ~1.3 m of room. Single-box plans are therefore **enfilade** — you walk through each zone to reach the next, with wet rooms at one end, not the middle.

**Wet-zone placement** follows the plumbing: put bathroom and kitchen back-to-back at the end nearest the utility connection, so all supply and waste penetrations cluster in one bay of the steel floor. In two-box plans, mirror the wet zones across the joint line and both units share one riser.

The standard answer to the width problem is joining boxes:

- **2 × 40 ft HC side by side ≈ 57 m² (609 ft²)**, with a 4.7 m wide open plan once the shared walls are cut (a continuous steel beam replaces them);
- 3 boxes ≈ 85 m² (914 ft²);
- 4 boxes ≈ 113 m² (1,218 ft²) — a full 3-bedroom footprint.

Leaving a 3–4 m gap between two parallel boxes and roofing it over adds a cheap, container-free living room in the middle.

Four proven plan templates cover most builds:

- **Studio (1 × 20 ft, 13.9 m²):** wet room at the closed end, kitchen wall, bed/living at the glazed door end.
- **One-bed (1 × 40 ft HC, 28.3 m²):** the enfilade described above.
- **Two-bed (2 × 40 ft HC joined, 57 m²):** bedrooms and bathrooms in one box, kitchen-living across the opened pair.
- **Three-bed courtyard (3 × 40 ft HC, ~128 m² incl. the roofed gap):** two parallel boxes 3.5 m apart, a sleeping wing and a service wing. The covered gap is the living room, and the third box across one end closes the U.

Any plan drawn on these footprints is buildable; plans that ignore the 2.352 m module are renders.

## The 40 ft container home, box by box

The 40 ft high cube is the default residential module for three measurable reasons:

- **Area per dollar:** 28.3 m² for a used price of $2,100–3,500, against $1,700–2,800 for half the floor in a 20 ft.
- **Ceiling height:** 2.698 m (8′10″) inside, so ~2.5 m survives a 100 mm floor build-up and 100 mm ceiling insulation. The standard-height 40 ft at 2.393 m (7′10″) ends near 2.193 m, a few centimetres above the IRC’s 2.13 m for habitable rooms and under it with any thicker build-up.
- **One crane lift** per 28 m² of house.

*Container home modules compared: the inside as most published sheets print it; tare the figure most often printed (a 20 ft’s sheets range 2,080–2,570 kg)*

| Module | Inside floor | Inside height | Tare | Typical role |
| --- | --- | --- | --- | --- |
| [20 ft](https://contsize.com/20-ft-container/) | 5.898 × 2.352 m = 13.9 m² | 2.393 m | 2,230 kg | Studio, office, plan extension |
| [40 ft standard](https://contsize.com/40-ft-container/) | 12.032 × 2.352 m = 28.3 m² | 2.393 m | 3,700 kg | Budget shell where code allows low ceilings |
| [40 ft high cube](https://contsize.com/40-ft-high-cube-container/) | 12.032 × 2.352 m = 28.3 m² | 2.698 m | 3,830 kg | The standard residential module |

A single 40 ft HC one-bedroom is the proven format. The full-width bedroom sits at the closed end, with bathroom and kitchen amidships over one plumbing bay. The living room takes the door end, where a glazed wall replaces the cargo doors — the one large opening you get without cutting the shell.

The weight of a 40 ft HC home stays trivial throughout: box (3.8 t) plus a full fit-out (3–5 t by builders’ estimates) is under a third of the 28,670 kg the structure is rated to carry at sea.

Checked 19 October 2026: outside sizes set by ISO 668, read in IS 6566:2001, GOST R 51876-2008 and GOST R 53350-2009; every other figure against 29 published sheets of 20 lines, lessors and makers. A sheet agrees within ±5 mm, or ±2 % for a mass and ±1 % for a volume; a maximum gross is a rating and must be the same. [Every figure and its sources](https://contsize.com/container-data-sources/)

## 2-story container homes: stacking rules

Containers are designed to stack — but only one way: **[corner casting](https://contsize.com/glossary/corner-casting/) on corner casting**. All vertical load travels down the four corner posts (six on long walls with joins). ISO 1496-1 tests a bottom box under 192,000 kg of loaded boxes above it (213,360 kg in the amended text, as IS 13288 prints it), through those castings alone.

Stack the boxes aligned, connect the castings with [twist-locks](https://contsize.com/glossary/twist-lock/) or welded plates, and the structure needs no extra steel: a 2-story, 2 × 40 ft HC home (2 × 28.3 m²) is the cheapest two-level configuration there is.

The rules change the moment boxes misalign. **Perpendicular stacking, offsets and cantilevers put the upper box’s corner posts onto the lower box’s roof or side rails — a roof the standard tests for 300 kg, a person with tools, not the weight of a furnished box.** Every such configuration needs a load path engineered back to real posts:

- steel columns inside the lower box;
- a beam bridging its top rails;
- or an independent frame.

The same applies when a lower wall is heavily cut for glazing. Remove the shear wall and the corner posts alone won’t brace the stack against wind; expect welded square-section reinforcement around the opening.

Practical 2-story numbers for a stack of high cubes:

- floor-to-floor height is the outside 2.896 m (9′6″) of a HC box, per ISO 668;
- stairs take a slice of the 13.9/28.3 m² on each level;
- the upper slab is simply the lower roof, but it still needs a proper joist layer, because the 2.0 mm roof sheet itself (as the container specifications we read print it) is not a walking floor.

Anchoring matters more with height: uplift and overturning on a light 7.7-tonne steel stack of two HC boxes are exactly what the engineer’s stamp is for.

## What a container home costs, line by line

The box is the cheap part. The table gives US ranges for a single 40 ft HC build, October 2026: the box, the delivery and the foundation come from our price table; the fit-out lines are builders’ estimates, not checked figures. Multi-box builds scale roughly linearly on the shell items and sub-linearly on MEP.

*Cost breakdown, single 40 ft HC container home (USD, October 2026): the box, delivery and foundation from dealers’ published prices; the other rows planning estimates, not read from a document*

| Item | Range | Notes |
| --- | --- | --- |
| Container (used → one-trip) | $2,100–5,600 | See [container prices](https://contsize.com/shipping-container-prices/) |
| Delivery | $400–800 local | Tilt-bed within ~50 miles |
| Foundation (piers → slab) | $1,500–12,000 | Piers suffice structurally — [foundation guide](https://contsize.com/container-foundation/) |
| Openings cut + framed | $500–1,500 each | 3–6 typical per box |
| Windows + exterior doors | $1,500–5,000 | Units themselves; an estimate |
| Insulation (closed-cell foam) | $2,000–4,000 | Whole shell — [insulation guide](https://contsize.com/shipping-container-insulation/) |
| Electrical + plumbing + HVAC | $5,000–15,000 | The least compressible line |
| Interior finishes | $5,000–20,000 | Floors, walls, kitchen, bath |
| **Total (sum of the rows, an estimate)** | **$19,000–71,400** | Low end: 3 openings, piers, DIY labour; high end: 6 openings and a slab |

Per square metre that is roughly $670–2,520/m² for one box, and the box is 8–11% of the sum. That explains the honest verdict on “cheap container homes”:

- a single-box studio genuinely undercuts conventional construction;
- a fully finished multi-box family home, by builders’ accounts, comes close to stick-built cost.

What you actually buy is **speed and logistics**: a weather-tight structural shell in weeks, craned onto piers on sites a conventional build would struggle to reach.

## Cutting openings: the structural rules

The corrugated walls are not cladding — they are the structure. The corrugations, 36 mm deep on the makers’ specifications we read, act as shear webs spanning between corner posts (see [what containers are made of](https://contsize.com/what-are-shipping-containers-made-of/)). Every door or window cut removes load path that framing must replace, and three working rules cover most cases:

- **Rule 1 — frame every cut.** Any opening gets a welded steel frame (typically 50–100 mm square hollow section) around its full perimeter, tied into surviving corrugations. The frame restores the panel stiffness the cut removed.
- **Rule 2 — headers over wide openings.** Openings wider than ~1.2 m need the frame’s top member sized as a genuine header carrying roof-rail load. Full-wall cuts for joined boxes need a continuous beam plus posts at the joins.
- **Rule 3 — never cut a corner post**, and treat the end frames and top/bottom rails as untouchable without engineering. Doors and windows go in walls, not corners.

Sequence matters as much as sizing: weld the reinforcing frame *before* completing the cut where possible, or brace the opening temporarily. A freshly cut, unframed wall lets the box rack out of square, and the cargo doors stop closing as the first symptom.

Existing openings are free strength: the door end already carries a full structural frame, which is why glazing the doorway is every builder’s cheapest big window (dimensions in the [door dimensions guide](https://contsize.com/container-door-dimensions/)).

## Permits: IRC, engineering stamps, state differences

In the US, an occupied container home is a dwelling like any other house under the code the jurisdiction adopts — usually the **International Residential Code**. Its 2021 edition sends a repurposed container’s structure to Section 3115 of the International Building Code, the section on intermodal shipping containers used as buildings (IRC R301.1.4).

In practice approval hinges on an **engineer-stamped structural package**. The container’s steel is not in the code’s prescriptive span tables, so a licensed engineer must certify the modified shell — every cut, weld, stack connection and anchor.

Beyond structure, expect the standard dwelling requirements:

- minimum room areas and a 7′ (2.13 m) habitable ceiling (IRC R305.1; why high cubes matter);
- egress windows in bedrooms;
- insulation to the local energy code;
- inspected MEP.

Rules vary sharply by state and municipality. Texas, California and Florida process container homes routinely, while some local zoning boards exclude them aesthetically regardless of engineering.

The practical sequence: confirm zoning first, engage the engineer second, buy the box last. Approvals can take months; the container arrives in weeks.

## Frequently asked questions

**Is it really cheaper to build a container home?**

For a single-box studio, yes — this guide’s cost table puts a finished 40 ft high cube, 28.3 m² (305 ft²) of inside floor, at $19,000–71,400, and the lower half of that range beats most conventional builds (the box, delivery and foundation are market prices; the fit-out lines are builders’ estimates). For a full family home, mostly no: cutting, reinforcing, insulating and engineering eat the shell savings, and finished multi-box builds commonly come close to stick-built cost. The reliable advantages are speed and site logistics, not headline price.

**Are container homes legal in the US?**

Yes — the model codes provide for them: the 2021 International Building Code has a section on shipping containers used as buildings (3115), and the 2021 International Residential Code sends a container’s structure to it (R301.1.4). Legality is decided locally: you need zoning that allows the dwelling, a building permit, and almost always engineer-stamped drawings for the modified shell. Some municipalities restrict them aesthetically, so confirm zoning before buying a box.

**How many square feet is a 40 ft container home?**

A 40 ft container home has about 305 ft² (28.3 m²) of inside floor per box — 12.032 × 2.352 m (39′5½″ × 7′8½″), per 13 of 16 sheets. Two joined side by side give roughly 57 m² (609 ft²); four give about 113 m² (1,218 ft²), a full 3-bedroom footprint.

**How many containers do I need for a 3-bedroom house?**

Typically three to four 40 ft high cubes — 85–113 m² (914–1,218 ft²) of inside floor, as most published sheets print a box’s inside. Common plans use two side-by-side pairs, or three parallel boxes with a roofed gap between them serving as the living room.

**What are the downsides of container homes?**

Five recur: the 2.352 m (7′8½″) inside width (≈2.202 m after insulation) forces multi-box plans for normal rooms; condensation and thermal bridging demand full insulation and ventilation; every cut opening needs steel re-framing; permits usually require an engineer’s stamp; and finished costs are closer to conventional building than marketing suggests.

**What is the life expectancy of a container home?**

Decades longer than its 13 years at sea, if it is kept dry — 13 years is the useful life a container lessor (Triton, in its 2023 annual report) writes a dry box off over in ocean service, and no document sets a figure for a static one. A static, insulated, painted container escapes the saltwater and stacking stress that end its sea life. With a draining roof and touched-up rust spots, the Corten shell outlasts most conventional cladding.

**Can a tornado pick up a 40 ft container home?**

An empty, unanchored 40 ft box ([tare](https://contsize.com/glossary/tare-weight/) 3,700 kg standard, 3,830 kg high cube, as most sheets print them) can be shifted or rolled by EF2+ winds — its flat sides are effectively sails of ~32 m². Anchored, the picture reverses: welded or bolted connections from all corner castings into concrete piers or a slab give a container home holding capacity far beyond a wood-framed house, which is why engineered container structures do well in hurricane zones. The anchor design is part of the engineer’s stamp.

**Do container homes rust?**

Slowly and predictably. The shell is Corten weathering steel, which forms a protective patina; rust concentrates where paint is broken and water sits — roof dents, welds, cut edges. Prime every cut during the build, keep the roof draining, and touch up chips; surface rust is cosmetic, sheet-flaking rust is not.

**What insulation does a container home need?**

The steel shell is one continuous thermal bridge, so it needs insulation on every surface — walls, roof, underfloor. The usual choice is 50–100 mm of closed-cell spray foam (R-6 per inch in the US Department of Energy’s guide; a newer HFO-blown foam’s sheet prints R-7.4) directly on the corrugations, which insulates, air-seals and vapour-blocks in one pass. Skipping the vapour control produces condensation inside the walls — “container rain”.

**Do you need a concrete slab for a container home?**

No — containers bear their load at the corner castings, so concrete piers or pads under the corners are structurally sufficient in most soils ($1,500–6,000 versus $3,000–12,000 for a slab, from our price table). A slab is a choice for other reasons: services routing, a plinth, or local frost-line practice.

**What ceiling height does a container home have?**

A 40 ft high cube starts at 2.698 m (8′10″) inside, per 13 of 19 sheets; after 200–300 mm of floor build-up and ceiling insulation expect 2.4–2.5 m. A standard-height box, at 2.393 m (7′10″), ends around 2.1–2.2 m — at or below the IRC’s 2.13 m habitable minimum (R305.1) once finishes go in, which is why high cubes dominate residential builds.

**How high can you stack container homes?**

The boxes themselves are tested for 192,000 kg of loaded boxes above them under ISO 1496-1 (213,360 kg in the amended text, as IS 13288 prints it), so a 2–3 story home is structurally trivial if the corner castings align and are connected. Residential limits come from local codes and wind/seismic engineering, not the steel; misaligned or cantilevered configurations need engineered columns and beams.

## Related pages

- [Shipping container poolSwim lengths · Litres · Structure · Cost](https://contsize.com/shipping-container-pool/)
- [Shipping container pricesUSD · US market · 28 named sources · read 2026-10-05 and 2026-10-09](https://contsize.com/shipping-container-prices/)
- [Container foundationsFour corners carry everything](https://contsize.com/container-foundation/)
- [Container insulationSpray foam · PIR panels · Rockwool](https://contsize.com/shipping-container-insulation/)
- [Shipping container cabin20 vs 40 ft · Off-grid · One-lift delivery](https://contsize.com/shipping-container-cabin/)
- [Shipping container office13.9 / 28.3 m² · Desks · HVAC · Cost](https://contsize.com/shipping-container-office/)