What can you build in Mortsel?

What you can build in Mortsel depends on the plan that covers your plot – the regional zoning plan (gewestplan), a spatial implementation plan (RUP) or a special development plan (BPA) – and on 8 planning regulations: 2 from Mortsel itself and 6 from the Flemish Region. The register lists 25 plans for Mortsel.

At a glance

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How much can I build in Mortsel?

That depends on the plot: the zoning plan that applies (the regional zoning plan, a RUP or a BPA), the regulations and what is there now. The Perceelscan works it out for each address: how many m² of floor area may legally be built, and how many are already built.

Do I need an environmental permit in Mortsel?

For most works, yes: building, renovating, demolishing and splitting a dwelling generally require an environmental permit (omgevingsvergunning, formerly called the building permit or planning permit), which you apply for through the Omgevingsloket portal. Some minor works are exempt or only require a notification: vlaanderen.be sets out the rules. For each address, the Perceelscan also shows the existing permits.

Can I demolish and rebuild in Mortsel?

Demolition usually requires an environmental permit. What you may build afterwards is determined by the plan and the regulations that apply to the plot; heritage status, a plan in preparation or an expropriation can stand in the way. The Perceelscan sets it all out for each address.

Can I split a dwelling into several units in Mortsel?

For Mortsel, the register lists no separate regulation on housing, but the general regulation ‘Bouwcode Stad Mortsel’ may contain rules on it. For each address, the Perceelscan lists the regulations that apply to the plot, with a link to their text. Splitting a dwelling into several dwellings generally requires an environmental permit, even without any building works (see splitting a dwelling on vlaanderen.be).

How many parking spaces must I provide in Mortsel?

For Mortsel, the register lists no separate regulation on parking, but the general regulation ‘Bouwcode Stad Mortsel’ may contain rules on it. For each address, the Perceelscan lists the regulations that apply to the plot, with a link to their text.

Do I need to install a rainwater tank in Mortsel?

Often, yes, when you build, rebuild or extend a building or a paved surface: the regional regulation on rainwater (2023) then sets rules for collecting and reusing rainwater, letting it soak into the ground or buffering it. Which measure your project requires depends on its surface area.

Does Mortsel impose planning obligations?

Mortsel addresses this in the regulation ‘stedenbouwkundige verordening inzake lasten bij een omgevingsvergunning’. A planning obligation is a piece of work or a contribution that the permitting authority can attach to an environmental permit, for example for a larger housing project.

Where can I find the spatial implementation plans (RUPs) for Mortsel?

In the register of plans and regulations (DSI) of the Departement Omgeving, with 25 plans for Mortsel (RUPs, BPAs and others). Where no RUP or BPA applies, the regional zoning plan (gewestplan) determines the zoning. For each plot, the Perceelscan names the plan that applies, with the zone and a link to its provisions.

The planning regulations of Mortsel

What applies throughout Flanders

What the Perceelscan checks for each plot in Mortsel

• The plan that applies: a municipal, provincial or regional RUP, a BPA, an APA or the regional zoning plan, with the zone and a link to its provisions.
• The regulations that apply to that plot: a regulation may also apply to only part of the municipality.
• How many m² of floor area may legally be built, and how many are already built.
• Plans and regulations in preparation, and expropriation plans.
• Heritage: protection, the established inventory and archaeological zones.
• Flood risk (P-score and G-score), signal areas (signaalgebieden) and PFAS zones.
• Right of pre-emption, nature, Seveso sites and sewerage in the street.
• Environmental permits on the plot and next door.

Find out for free what you can build on your plot in Mortsel

Building near Mortsel

• What can you build in Edegem?
• What can you build in Hove?
• What can you build in Boechout?
• What can you build in Wommelgem?
• What can you build in Kontich?
• What can you build in Lint?

Source: DSI, the register of plans and regulations of the Departement Omgeving, retrieved on 5 October 2026. Each regulation’s record contains its full text.

Updated on 11 October 2026