# Attefallshus Bromma: Permits & Regulations 2026 *Olov Nilsson* *17 augusti 2026* > Dreaming of an Attefallshus in Bromma in 2026? Here's your complete guide to permits, regulations, costs, and everything else you need to know to make your project a reality. Building an Attefallshus in Bromma in 2026 can be an excellent way to increase living space, create additional accommodation, or generate passive income. These complementary buildings, which can be up to 30 sqm, do not require a traditional building permit application but are subject to specific rules and procedures that are important to know. This guide provides a comprehensive overview of what applies to Attefallshus in Bromma, from the basic regulations to practical tips for a successful project. ## Building an Attefallshus in Bromma: A Complete Guide 2026 An Attefallshus, also known as a 'friggebod-complement', is a complementary building that can be erected without a building permit under certain conditions. These rules apply throughout Sweden, but local detailed development plans and regulations in Bromma can affect the possibilities. Understanding these rules is crucial to avoid problems and delays. ### Step 1: Understand the Basic Rules for Attefallshus The general rules for Attefallshus are regulated by Boverket (the National Board of Housing, Building and Planning). An Attefallshus can be a maximum of 30 square meters in building area and can be used as a permanent residence (complementary dwelling house), holiday home, garage, storage, greenhouse, or other type of complementary building. However, there are limitations regarding its placement in relation to the main building and property boundaries. According to the Planning and Building Act (PBL), the Attefallshus must be placed at least 4.5 meters from the property line if it is not a complementary dwelling house or complementary building intended for agricultural or forestry purposes. For complementary dwelling houses or complementary buildings intended for agricultural or forestry purposes, the distance is 30 meters from the boundary with another property. It is possible to obtain a waiver from the distance requirements if neighbors approve. ### Step 2: Building Permit or Notification in Bromma? Even though an Attefallshus does not require a traditional building permit, you must submit a building notification to the municipality where you plan to build. In Bromma, which is part of Stockholm City, this is handled by the City Planning Administration. In the building notification, you must attach drawings and descriptions of the house and how it will be placed on the property. The municipality will then review your notification to ensure that the measure complies with all requirements in the Planning and Building Act, the Planning and Building Ordinance, and any local regulations. A start-up permit is required before you can begin construction. ### Step 3: Check Detailed Development Plans and Local Regulations Although Attefallshus are generally permitted, Bromma's specific detailed development plans and area regulations may affect the possibilities. Some areas may have restrictions on size, design, or placement that go beyond national rules. Therefore, it is important to check the applicable detailed development plan for your property with Stockholm City before you start. You can find information on detailed plans on the city's website or by contacting the City Planning Administration. Understanding these local conditions is crucial to avoid costly mistakes. [Boverket](https://www.boverket.se/sv/samhallsplanering/bostadsmarknad/) provides general information on the housing market and building regulations. ### Step 4: Costs for an Attefallshus in Bromma The cost of an Attefallshus varies greatly depending on size, material choices, standard, and whether you hire tradespeople or build it yourself. A simple frame can cost from approximately SEK 150,000, while a fully equipped house with a kitchen, bathroom, and high standard can easily amount to SEK 300,000 - 500,000 or more. Don't forget to include costs for: * Notification fee and start-up permit * Connection of electricity, water, and sewage (if applicable) * Foundation and groundwork * Materials and building permit drawings * Potential tradesperson costs * Inspection and completion certificate ### Step 5: Possibilities with Complementary Dwelling Houses One of the most common uses for Attefallshus is as a complementary dwelling house. This means it can function as a separate residence on the property, perfect for renting out to students, elderly relatives, or as an extra living space for the family. Renting out an Attefallshus can provide a stable side income, but it's important to familiarize yourself with the rules regarding rentals, including taxes and rental agreements. Check local rental regulations and any accessibility requirements if it is to function as a permanent residence. ### Step 6: What Do People Say on Flashback About Attefallshus in Bromma? Discussions on forums like Flashback and Familjeliv often show a mix of enthusiasm and caution regarding Attefallshus. Many share their experiences with the construction process, unexpected costs, and how they solved practical challenges like water and sewage. Common themes include the importance of thorough planning, obtaining neighbor consent, and being prepared for varying processing times by the municipality. Some warn against underestimating the time and complexity, especially regarding connections and foundations. Others highlight the joy of having an extra dwelling that can provide both financial gain and increased quality of life. It is clear that thorough research and preparation are key to a successful project. ### Step 7: Common Mistakes to Avoid One of the most common mistakes is not checking the detailed development plan or local regulations carefully enough. Another is underestimating the costs, especially for groundwork and connections. Many also forget to apply for a start-up permit before construction begins, which can lead to fines. Also, ensure you have clear agreements with any tradespeople and that all drawings are correct and up-to-date. ## Frequently Asked Questions about Attefallshus in Bromma ### What is the maximum size of an Attefallshus? The maximum building area for an Attefallshus is 30 square meters. This applies regardless of whether it is intended for use as a permanent residence, holiday home, garage, or other type of complementary building. ### Do I need a building permit for an Attefallshus in Bromma? No, a traditional building permit is not required for an Attefallshus. However, you must submit a building notification to Stockholm City (City Planning Administration) and obtain a start-up permit before you can begin construction. ### Can I rent out my Attefallshus in Bromma? Yes, an Attefallshus that meets the requirements for a complementary dwelling house can be rented out. However, it is important to familiarize yourself with the applicable rental regulations, including tax rules and any local provisions.