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Structural engineer in Zwolle

Structural calculations for your building project in the municipality of Zwolle. Explore local housing figures, soil-map data, settlements and preparation.

The local housing profile

For Zwolle, Statistics Netherlands (CBS) records 133,810 residents and 61,693 homes on 1 January 2025. Single-family homes make up 64% of the stock; dwellings in multi-unit buildings account for 36%. This distinction helps when preparing an alteration: work on an entire house raises different questions from work within a shared building. Describe which walls, floors or roofs you wish to alter.

Within Overijssel, 11.2% of residents live in the municipality of Zwolle. The settlement classification dated 1 January 2026 lists 1 settlement here. This is Zwolle. The population and housing figures on this page cover the entire municipality, including these settlements.

Zwolle — municipal figures
CharacteristicNumber or shareReference date or period
Population of the entire municipality133,8101 January 2025
Homes61,6931 January 2025
Single-family homes64%1 January 2025
Dwellings in multi-unit buildings36%1 January 2025
Homes more than ten years old91%1 January 2025
Newly built homes added6082025
All renovationsNot available in these sourcesNo estimate

CBS — population (1 January 2025) · CBS — housing stock and dwelling types (2025) · CBS — officially registered settlements (1 January 2026)

Load-bearing wall and external wall openings

Among the individual dwelling types in the CBS table, terraced house has the highest published share in Zwolle (40%). When altering a terraced house, useful points to discuss include connections to party walls, the direction of the floor structure and support above the opening. This is a discussion point based on the housing profile, not a count of the most frequently completed renovations.

Zwolle compared with Overijssel

With 133,810 residents, Zwolle ranks 2 among the 25 municipalities in Overijssel, from largest to smallest population. The municipality accounts for 11.6% of the province’s housing stock and 3.3% of its land area. This shows the relationship between the number of homes and the area within this municipality.

Calculated population density in Zwolle is 1,209 residents per km² of land, compared with 361 for Overijssel. This is an area comparison, not a measure of access to your building site. Describe access, available working space and adjoining buildings in your enquiry.

CharacteristicMunicipality of ZwolleProvince of Overijssel
Population133,8101,195,789
Housing stock61,693531,840
Land area (km²)110.673,316.48
Calculated residents per km² of land1,209361

Reference date: 1 January 2025. Provincial totals are summed from municipal data; densities and shares are calculated from these totals. Rounded areas can produce small differences from directly published densities.

Soil and ground types

Within the boundaries of Zwolle, map unit kVz covers the largest measured area of soil polygons in this analysis: 613 hectares, or 7.0% of the mapped area.

Original Dutch source name:

Waardveengronden op zand, beginnend ondieper dan 1.2 m

Soil map 2025 — intersection with the area boundary
Map codeDutch soil classification: first unitArea (ha)Share of mapped area
kVzWaardveengronden op zand, beginnend ondieper dan 1.2 m6137.0%
fpZg23gBeekeerdgronden; lemig fijn zand5055.8%
vWzMoerige eerdgronden met een moerige bovengrond op zand4735.4%
Rv01CKalkloze drechtvaaggronden; profielverloop 14294.9%
Zn21Vlakvaaggronden; leemarm en zwak lemig fijn zand4254.9%
Other unitsOther mapped soil polygons6,25471.9%

The shares are calculated within the soil polygons on the map, not across all land or all building addresses. For compound map codes, the name of the first unit is shown. The map describes shallow soil; built-up areas are not fully mapped. It does not establish bearing capacity or determine whether piles, pad footings or strip foundations should be used.

Explore subsurface data in BROloket · How the soil map can be used · Method and sources for these area profiles

Read about foundation investigations · Pad footing, pile or strip foundation?

How much renovation takes place?

The CBS tables used here do not provide a complete local renovation count for Zwolle. We therefore do not estimate this from population, new homes or a national percentage. These sources also do not establish which type of renovation is most common.

See the available building figures and what they mean

Towns and villages within this municipality

The names below are officially registered BAG settlements from the 2026 CBS classification. One settlement may contain several neighbourhoods. The municipal figures above are not separate population counts for these villages.

Structural calculations for your project

Choose the alteration that matches your project. The linked service page describes the information needed, possible deliverables and points to consider. Site surveys, timing and costs are agreed for each commission.

ServiceStart with this informationFurther explanation
Remove load-bearing wallFloor plans of all floors; Desired width and position of the openingView the structural calculation service
New extensionDrawings of the existing and new situation; Dimensions and desired materialsView the structural calculation service
Additional rooftop storeyExisting structural and foundation drawings; preliminary design of the additional storeyView the structural calculation service
FoundationsLoads and design of the superstructure; Available soundings or soil reportsView the structural calculation service
Steel beamClear span and total available length; Load from floors, roof and wallsView the structural calculation service
DormerRoof cross-section and existing beam dimensions; Dimensions and position of the dormer windowView the structural calculation service
Roof terraceDrawings of the existing roof; Desired layout and floor structureView the structural calculation service
Solar PV panelsLaying plan and ballast plan from the installer; Weights of panels and mounting systemView the structural calculation service
Stair openingFloor structure and bearing direction; Position and dimensions of the openingView the structural calculation service
House and new constructionArchitectural design; Available soil surveyView the structural calculation service
Extension of an existing roomExisting and desired floor plan; Sections and dimensionsView the structural calculation service
BalconyExisting facade and floor drawings; Balcony dimensions and choice of materialsView the structural calculation service
Bay extensionFacade drawings and section; Dimensions and frame layoutView the structural calculation service
CanopySizes and position; Roof covering and roof slopeView the structural calculation service
CarportDimensions and clear passage; roof build-upView the structural calculation service
GarageFloor plan and doors; roof and floor build-upView the structural calculation service
ShedDimensions and construction method; Intended use and storageView the structural calculation service
Flat roofBeam or slab details; roof build-upView the structural calculation service
Remove chimneyCross-section of the chimney flue; Desired removal per floorView the structural calculation service
Timber floor joistsBeam sizes and center-to-center distances; Spans and supportsView the structural calculation service
LintelOpening and dimensions; Wall and facade constructionView the structural calculation service
Steel trussGeometry and supports; roof and facade weightsView the structural calculation service
Roof ridge raisingExisting roof cross-section; Desired ridge and gutter heightsView the structural calculation service
Floor and floor reinforcementType and construction of the floor; Drawings and existing reinforcement where knownView the structural calculation service
Additional storey above an extensionExisting extension drawings and calculations; Foundation dataView the structural calculation service
Sliding doors and facade breakthroughFacade view and section; Desired openingView the structural calculation service
Multiple interventions in one projectOverview of all proposed interventions; Coordinated design drawingsView the structural calculation service

Submit your building plans

For a project in Zwolle, start with the building address and proposed alteration. For alterations to a house: which walls will be removed, where must the space remain clear and how are the storeys above supported?

Discuss your project

What are your construction plans?

Tell us what you want to change. Then we look at what calculation is needed.

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