When you search for information about container homes, you come across two completely different things, although they have a similar name. On the one hand, there are shipping container homes — a shipping container, later converted into a home. On the other hand, there is an FDC container home, a unit built from scratch in a factory specifically to be lived in. Both ultimately become a living container, but they start from opposite starting points. Here we are not telling you “which is absolutely better”, but we are helping you to honestly understand which option suits you — because the real difference is not visible in the pictures.
What are we really talking about? Converted maritime vs. container built for living
At first glance, the two solutions may look similar: metal walls, rectangular shape, a modern-industrial air. The difference, however, is not in appearance, but in the starting point. One variant reuses a structure made for transporting goods; the other starts from a structure designed for living. FDC container houses are a natural representative of the second category — houses built to be lived in — with monoblock models (models A and B) and modular models (models C and D). It is not the only option on the market, but it illustrates well what a container designed from the beginning as a home means.
What is a converted shipping container?
A shipping container is a standardized shipping container, available in two common lengths — approximately 6 or 12 meters (20ft/40ft). It is made of Corten steel, with corrugated walls and extremely strong load-bearing corners — built to withstand stacking, crane handling, and ocean crossings. It is purchased new or used, then converted into a home: cutouts for doors and windows are made, the structure is reinforced, insulation and finishes are added. The starting point seems cheap, but the conversion itself — labor, materials, insulation — adds costs that add up.
What is a FDC (built to live) container house?
A FDC container house is manufactured from scratch, in the factory, specifically for living. The frame is made of galvanized, cold-formed sheet metal, primed and electrostatically painted for increased corrosion resistance. The walls are made of sandwich panels with PIR foam, so the insulation is integrated into the construction, not added later. The openings, installations and finishes are configured in the factory, and the house arrives at you ready assembled. There are two types: monoblock container houses — compact, from a single container — and modular houses , modular containers that join together horizontally, up to D-storey models.
Why don't you actually compare two things that are the same?
The temptation is to put the two variants side by side, as if they were identical just because they look alike on the outside. In reality, you are comparing a structure designed for freight transport with one designed for living. This is where it all starts: the real difference is not seen in the photos, but in the insulation, the useful dimensions of the rooms and what exactly is included in the price. A shipping container and a FDC container house may look similar on the outside, but they offer different living experiences. Before comparing, it is worth knowing when a container house is habitable and what conditions it must meet to be truly a home.
The real difference, in points
Let's get into the details. Below you will find, in brief, the main differences between a converted shipping container and a FDC container house, and then we will detail each one — including modular container houses, where expansion is planned from the start.
| Criterion | Sea container (converted) | FDC container house |
| Starting point | Used, converted shipping container | Unit built from scratch for living |
| Insulation | Added after conversion | Sandwich panel walls with PIR foam, mineral wool in the ceiling and floor |
| Thermal comfort | Depends on the insulation performance | From construction, all year round |
| Usable width | Fixed, narrow (~2,35 m inside) | Options 2,40 / 3,00, and for larger sizes more containers can be added |
| Openings (doors/windows) | Cutting + reinforcement on site | Designed and assembled from the factory |
| Finishes and installations | Added separately | Included, factory configured |
| Time until the house is ready | Variable (finding/procuring the container + labor) | Production takes 6–8 weeks + assembly hours/days |
| Guarantee | Usually none | 24 months (individuals), 12 months (legal entities) |
Insulation and thermal comfort
This is probably the most important difference. In a shipping container, the metal is a cold surface: without an impeccably executed insulation, condensation and comfort problems can arise. It can be solved, however, only by insulation added correctly after the conversion, and the result depends a lot on the quality of the execution. In a house made of FDC containers, the insulation is integrated: walls made of sandwich panels with PIR foam (thicker in the premium insulation version), plus mineral wool in the ceiling and floor, forming a continuous layer, with fewer thermal bridges. The result is thermal comfort in the construction, all year round.
Useful dimensions (width and height)
The shipping container has a fixed and small width — around 2,35 m on the inside, and less after you add insulation on the inside. This is where the compartmentalization compromises and the so-called “corridor effect” come in: long and narrow rooms. A FDC container house offers different widths, depending on the configuration (2,40 / 3,00 / 4,80 m, or larger by joining several containers), with a usual height of 2,70 m. Basically, you get more usable rooms and a compartmentalization closer to that of a classic house. You can find out more about what dimensions a container house can have.
Openings and structure (cutouts / reinforcements)
The strength of a shipping container comes precisely from the corrugated walls and load-bearing corners. When you cut for doors and windows, you weaken the structure and have to reinforce it with steel profiles — which means labor, welding and additional cost. In a house made of FDC containers, the openings are provided in the project, they are not improvised on the construction site. There is also a clear rule here: the walls of FDC Container Houses, being sandwich panels with PIR foam, are not cut after production, for reasons of tightness and thermal efficiency. Any extension or opening is prepared from the tender phase.
Floor and materials
Shipping container floors are often chemically treated for shipping to resist moisture and pests during the journey. For a living container, they usually require sealing or replacement. In a FDC container house, the floor is made of residential materials from the very beginning — parquet or PVC carpet, in several shades. It is a detail that concerns both comfort and cost.
Execution time and predictability
In a conversion, the deadline depends on the availability of containers on the market and the schedule of the labor team — it can be quick or it can be extended. In a house made of FDC containers, the calendar is more predictable: production takes 6–8 weeks, and the actual assembly takes from a few hours (monoblock models A and B) to 1–2 days (modular models C and multi-storey houses D). Especially useful if you have deadlines to meet. The protection of the metal structure is also important , which is related to long-term durability.
What is the real cost of the container structure?
Here's the classic trap: you look at the price of the empty structure and think you know how much the house costs. In reality, the real cost is made up of several elements, and the two options are only compared correctly at the total, not at the starting price. When looking for housing containers price or modular homes price , be careful what the displayed amount includes.
What goes into the cost of a converted shipping container?
In the maritime version, the price of the container (new or second-hand) is added, step by step: transport and crane; cutouts and reinforcements for doors and windows; insulation and vapor barrier; sealing or replacing the floor; electrical and plumbing installations; finishes; and placement on concrete slabs or pillars. Each step has its own cost. Therefore, the price of a maritime container house that seems small at first can increase considerably until the home is ready to use. The conclusion? You are comparing correctly at the total cost, not at the starting price.
What goes into the cost of a FDC container house
In an FDC container house, many of these elements are included from the start — that's why we talk about turnkey container houses : insulation, installations and finishes are part of the model. Options can be added to the price — a living container with a fully equipped bathroom, premium insulation, floor, larger glass surfaces — plus transportation and assembly, offered together as a single service, calculated according to the distance to the site.
The price of each model is displayed on the site and varies depending on the surface, insulation level and finishes, and the prices displayed do not include transportation and installation. For an accurate estimate, adapted to your configuration, the best step is to see the price of the desired model on the site and then request a personalized offer.
Myths about container homes
In addition to the technical differences, it is worth clarifying a few widespread but inaccurate ideas. There are four myths circulating about shipping container homes in particular that are worth clarifying.
"Corten doesn't rust." Corten steel forms a patina layer that slows down corrosion, but doesn't completely eliminate it. In an exposed and cut-out shipping container, the affected areas remain a point of attention in terms of execution and maintenance. At FDC, the frame is primed and electrostatically painted precisely for increased corrosion resistance.
"It's metal, so it's the same everywhere." No. The difference is between the insulation added after conversion (maritime) and the insulation integrated into the walls of PIR foam sandwich panels, with mineral wool in the ceiling and floor (FDC). Same basic raw material, two different results in comfort.
"A container is a container." A shipping container is designed for transportation; a house made of FDC containers is designed for living. The purpose of the design changes everything: dimensions, openings, installations, finishes.
"Maritime is always cheaper." Only at the structural level. At the total cost — with insulation, reinforcements, installations and finishes — the difference is much reduced, sometimes disappears. These nuances remain valid whether we are talking about a compact model or houses made of modular containers, horizontally extendable.
"You don't need a permit" — what you need to know
This is the myth that can cost the most. A permit may be required for a permanent home, regardless of the type of container — shipping container or FDC container house. Because the requirements differ from one locality to another, the safest thing is to inquire directly at the city hall to which you belong. The articles about what foundation is needed and the lifespan of a container house are also useful.
Who is each option suitable for?
There is no universal answer — it depends on you. Here, in short, is who each option is suitable for.
Shipping container homes are for you if you want a DIY project, like the authentic industrial aesthetic, are comfortable with labor and site supervision, and emphasize reuse and sustainability. You accept a certain execution risk in exchange for a small start-up budget and the freedom to control every detail.
A FDC container house is the right choice for you if you want predictability: clear deadlines, integrated insulation and turnkey delivery. You get more generous widths and compartments, the possibility of later expansion through modular container houses (additional containers or floor in D models) and factory-made finishes. It is suitable as a permanent home, holiday home or tourist accommodation space (including Airbnb or Booking). You can explore container house models , holiday home ideas and further expansion options.
Real opinions and experiences
What do those who have already been through it say? If you collect opinions about container houses or look for real opinions about container houses, a common thread quickly emerges: in shipping container houses, insulation must be done impeccably. Owners who have invested in proper insulation and sealing are satisfied; where savings were made in this regard, comfort problems have arisen — cold in winter, condensation, higher bills. In other words, real experiences confirm exactly the idea in this article: the difference is not in the "metal", but in the execution and insulation.
With FDC container homes, where insulation is built into the construction, this execution risk is much reduced — a reason why many homeowners choose the predictability of a pre-configured unit, designed from the ground up as a home. You can read the owners' experiences for a more complete picture, directly from people who already live in such a home.
Conclusion — how do you choose the right one?
How do you choose between the two? I'm not asking which is better per se, but which one meets your needs. Shipping container homes can be the right choice for a DIY project, with a small start-up budget, for someone willing to manage the work themselves. A FDC container home, on the other hand, offers you predictability, built-in insulation and turnkey delivery, with far fewer variables along the way. In both cases, the key lies in your needs: how much space you need, how quickly you want to move and how much control (or how much peace) you want. Start from there and the choice becomes simple.
Frequent questions
What is the real difference between a shipping container house and an FDC container house?
A shipping container is a shipping container converted into a home, with insulation added after the conversion. A FDC container house is built from scratch in a factory for housing, with insulation integrated into the walls of PIR foam sandwich panels and is delivered turnkey. The real difference is in the insulation, useful dimensions and what is included in the price.
Is the container house rusting?
Steel can corrode over time if not protected. In FDC container homes, the galvanized sheet metal frame is primed and powder coated for increased corrosion resistance, and with proper placement and maintenance, the structure remains durable. In a shipping container, cut-out areas require extra attention to protection and maintenance.
Do I need a permit for a container house?
For permanent residence, authorization may be required, just like for a classic house and regardless of the type of container. Requirements vary from one locality to another, so we recommend that you inquire directly at the city hall to which you belong.
Which option is cheaper?
Shipping container homes seem cheaper at the starting price. However, at the total cost — with insulation, reinforcements, installations and finishes — the difference is much smaller. A container home's correct price is calculated at the end, not at the empty structure level.
How long does it take until it's ready?
For a FDC container house, production takes 6–8 weeks, and assembly takes from a few hours (monoblock) to 1–2 days (modular and multi-storey). For the maritime version, the term depends on the availability of containers and the labor team.
Can it be expanded later?
Yes, FDC modular containers (C and D) can be extended horizontally by joining several containers. The condition is that the intention is communicated from the bidding phase, so that the joining areas are prepared from the start.
How long does a container house last?
The containers have a lifespan of over 20 years. With proper placement on concrete slabs or pillars and regular maintenance, the lifespan can be considerably extended.
What warranty does FDC Container Houses offer?
For individual customers, the warranty is 24 months, and for legal entity customers, it is 12 months.
