A house without a permit up to 70m2 – how to build it legally with modular technology?
The introduction of regulations allowing the construction of objects such as a house without a permit up to 70m2 in a simplified procedure has caused a real earthquake on the construction market, and our System-S design office has started receiving hundreds of inquiries from investors who want to quickly and painlessly realize their dream of their own home. As an engineer responsible for technology and implementation at System-S, however, I see that the media message about "houses without formalities" has done as much good as harm, creating information chaos. Investors often confuse the lack of a permit with the lack of any rules, which is a straight path to financial and legal disaster. The modular technology we are developing is the perfect answer to these regulations, but on the condition that this process is carried out correctly.
The notification procedure vs. a house without a permit up to 70m2 – what exactly do you get?
A key misunderstanding is the belief that a "house by notification" is a building that can be sketched on a piece of paper and taken to the office. Nothing could be further from the truth. The Building Law in Articles 29 and 30 clearly indicates that for the notification of the construction of a detached house up to 70 m², a complete architectural and construction project and a site development plan (PZT) must be attached. At System-S, we take this burden off the investor's shoulders. Our design team prepares full technical documentation of our modules, which includes floor plans, sections, elevations, and technical descriptions of the structure and installations. These are the same professional drawings that would be required for a "normal" building permit. The difference lies in the administrative path.
In the simplified procedure, the authority (District Office) does not have a statutory 21-day period to raise an objection – theoretically, construction can begin immediately after the notification is delivered. However, as System-S engineers, caring for the legal safety of our clients, we recommend caution. It is worth making sure that the office does not see any formal deficiencies in the submitted PZT. The site development plan must be made on a current map for design purposes by a licensed designer – he is the one who "places" our ready-made System-S house project on your specific plot, checking the distances from the borders. Without this document, no module will leave our factory, because we do not want to contribute to illegal construction.
Local Spatial Development Plan vs. modular construction for business
Even the best technology and a "permit-free" procedure are not above local law. The Local Spatial Development Plan (MPZP) is the bible for every engineer and investor. If the MPZP on a given plot provides only for farmstead development or services, we will not build a single-family house there, even if it is only 35 m². Importantly, our solutions also include professional modular construction for business, which allows commercial investors to quickly build accommodation bases in accordance with the land use designation in the local plan.
A common problem we face at System-S are the provisions regarding roof geometry. Many plans in Poland impose gable roofs with a pitch of 35-45 degrees. In such situations, our modern A-Frame Forest Prism cottage is ideal, as its form perfectly fits the strict requirements for steep roofs, while offering an uncompromising design.
To meet various requirements, we have developed hybrid solutions at System-S. Our modules have a reinforced steel frame that allows for the assembly of a prefabricated roof truss on the construction site. Thanks to this, we can deliver a modern, energy-efficient modular house that visually fits into the traditional landscape and meets the requirements of the MPZP or Building Conditions (WZ). Please remember: the simplified procedure exempts you from procedural bureaucracy, but it does not exempt you from the obligation to comply with the local plan. The official will not check this at the time of notification, but the building supervision will do so at the time of acceptance, and then the consequences can be painful.
Impact area – how System-S walls save plot space
A critical condition for using the simplified procedure for houses up to 70 m² is the requirement that the building's impact area must be entirely within the investor's plot. In engineering practice, this means maintaining appropriate distances from the borders. Here, System-S technology shows its gigantic advantage over traditional construction. Our external walls are about 25-30 cm thick while maintaining better thermal parameters than a 50 cm thick wall. What does this change? On a small plot and with a limit of 70 m² of building area (calculated along the outer contour), thinner walls mean more space inside and a smaller external footprint.
When designing our houses, including the popular Forest Prism, we pay special attention to the location of window and door openings. We vary our projects so that one of the walls is "blind", which allows us to get closer to the plot border to a distance of 3 meters. In the case of narrow plots, the precision of System-S prefabrication is key. With us, dimensions are kept with an accuracy of millimeters, which gives the surveyor staking out the building confidence that the impact area will not exceed the assumed limits.
Construction manager – why do we require one at System-S?
The legislator has allowed for the waiver of hiring a construction manager for houses up to 70 m². As an engineer representing System-S, I must say it bluntly: this is a liability trap. Building a house, even a modular one, is a complex technical process. As an investor, are you able to assess the class of concrete for the foundations? Can you verify the correctness of the waterproofing of the sill plate? Can you assess the tightening torque of the turnbuckles connecting the modules?
That is why at System-S, we recommend, and even require, the presence of a construction manager on the investor's side. Our assembly crews are highly qualified, but an independent eye of a licensed engineer is a guarantee of your safety. In case of any problems in the future, the lack of professional supervision may be the basis for the insurer to refuse to pay compensation. We build houses for years, not sheds, so professionalism must come first.
Foundations for System-S – an engineering specific
I am often asked: "Do I have to pour concrete for a house without a permit?". The answer from System-S is unequivocal: we build all-year-round houses, compliant with the standards, so a foundation is a must. The building law defines a residential building as permanently attached to the ground. Placing a house on concrete blocks without foundation footings below the frost line is a risk of the object being considered temporary and a technical risk – soil settlement and wall cracking.
For our objects, we recommend two solutions provided in the form of a structural design:
- Foundation slab: The "Mercedes" solution. It provides a perfectly flat surface, excellent insulation from the ground, and stability of the entire structure.
- Point foundations (footings) with a sill plate: An economical solution, possible on soils with good bearing capacity.
The choice depends on the geotechnical investigation, which we at System-S treat as mandatory. You cannot design a safe foundation without knowing what is hidden under the topsoil.
WT 2021 parameters – physics in the service of System-S
A house up to 70 m² by notification must meet the Technical Conditions 2021 to the same extent as any other new house. This means strict standards for energy efficiency. The heat transfer coefficient U for walls cannot exceed 0.20 W/(m²K), and for the roof 0.15 W/(m²K). Many cheap timber-frame or container constructions are not able to meet these requirements. At System-S, we use advanced multi-layer partitions. The core of the structure is filled with open-cell PUR foam or rock wool, which allows us to achieve excellent parameters while maintaining the slimness of the walls.
Comparison of wall technology for a 70m2 house
| Parameter | System-S Wall (Frame + PUR) | Traditional Wall (Porotherm + Styrofoam) | "Container" Wall (Sandwich Panel) |
|---|---|---|---|
| Total thickness | 26-28 cm | 45-50 cm | 10-15 cm |
| U-value | 0.16 - 0.18 W/m²K | 0.18 - 0.20 W/m²K | Often > 0.30 (does not meet WT) |
| Usable area (for 70m2 bldg. area) | approx. 60-62 m² | approx. 53-55 m² | approx. 65 m² (cold object) |
| Heat accumulation | Low (quick heating) | High | Very low |
| Airtightness | Very high (factory-made) | Dependent on plasters | Low at joints |
"Plug & Play" installations and modular solutions for business
In the simplified procedure, time is key. In System-S technology, all installations: electrical, water and sewage, and even ducts for heat recovery, are installed in the walls of the modules during production in the hall. We work in laboratory conditions, where a quality control engineer checks every fitting. This is particularly important when we implement modular construction for business, where a short return on investment and immediate readiness of the object for operation are important.
A module with ready installation outlets arrives at the site. The task of the local installer is only to connect the modules to each other and to the external connections. The foundation design provided by System-S contains the exact coordinates of the penetrations, which eliminates errors at the final assembly stage.
Logistics and assembly – an open-heart operation
When deciding on a System-S modular house, it should be remembered that it is an oversized object. It usually consists of two modules (e.g., 2x 35m²) or is a single monolith. Transport and assembly are the most logistically difficult moments of the investment. Our modules weigh from 8 to 12 tons. To unload them, we need a crane with a lifting capacity of 30-50 tons. Before signing the contract, we always conduct a site visit – we check the access roads, viaducts, and power lines to be sure that our modern prefabricated object will arrive safely at its destination.
Completion of construction – formalities at the District Building Supervision Inspectorate (PINB)
When the System-S house is already standing, the last formal step remains. Despite the lack of a permit, we must submit a notice of completion of construction to the PINB. The notification must be accompanied by, among others, a statement from the construction manager (if a construction log was kept), reports from installation tests, and a as-built geodetic survey. At System-S, we provide you with a complete set of certificates for the materials used, which makes the acceptance process smooth and hassle-free.
Why is System-S a safe choice for a "70"?
In summary, building a house without a permit is a great opportunity, but it requires an engineering approach. By choosing our technology, you are choosing a partner who will guide you through this process safely. We don't just sell walls and a roof. We sell technical certainty. Our projects are optimized for the requirements of the law, and the precision of execution eliminates the risk of errors on the construction site, for which the Investor would be responsible in the simplified procedure. In the maze of regulations, it is worth betting on a proven System.
