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Structural engineer in Hilversum

Preparing a dormer, raised roof ridge or new attic layout in Hilversum? Gather the original roof drawing and records of later roof alterations. Record the file associated with each drawing, so the new proposal is not based on an outdated roof layout.

Your building project

Planning changes to a property in Hilversum?

Request structural calculations for your project. Choose the work you are planning or tell us what you want to change.

What you can send us

  • The address of your project.
  • A short description of your plans.
  • Any drawings and photos you already have.

No drawings yet? You can still get in touch. We will discuss the information needed for your calculations.

Prepare your local project

Hilversum: assemble connected records for your roof proposal

  1. Choose the route for each period

    Hilversum directs 1901–2000 searches to its online drawings search, 2001–April 2010 permits to Archief Gooi en Vechtstreek and later permits to the municipal contact form.

    Practical step: List the year of each known roof alteration. Search separately for the original roof and a later dormer; their records may be available through different routes.

    Official source · Gemeente Hilversum — bouwtekeningen
  2. Keep the file number with the scan

    Hilversum states that digital drawing details include the file number. This number identifies the paper file in the archive reading room.

    Practical step: Record file number, drawing number and year in your document list. For an unreadable or missing section, note which additional record you still need to request.

    Official source · Gemeente Hilversum — bouwtekeningen
  3. Check the address status

    Hilversum identifies Noordwestelijk Villagebied, Plan Oost and Hilversum Zuid as protected townscapes and links to a map of monuments and area boundaries.

    Practical step: Check the exact address and keep relevant status information with your sketch. Discuss heritage or permit questions separately from the structural calculation enquiry.

    Official source · Gemeente Hilversum — beschermd stadsgezicht

Municipal information checked on 1 November 2026. The practical steps are our preparation suggestions. Archive records and maps do not automatically describe the current condition of your building.

The local housing profile

For Hilversum, Statistics Netherlands (CBS) records 94,393 residents and 43,894 homes on 1 January 2025. Single-family homes make up 58% of the stock; dwellings in multi-unit buildings account for 42%. 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 Noord-Holland, 3.2% of residents live in the municipality of Hilversum. The settlement classification dated 1 January 2026 lists 1 settlement here. This is Hilversum. The population and housing figures on this page cover the entire municipality, including these settlements.

Hilversum — municipal figures
CharacteristicNumber or shareReference date or period
Population of the entire municipality94,3931 January 2025
Homes43,8941 January 2025
Single-family homes58%1 January 2025
Dwellings in multi-unit buildings42%1 January 2025
Homes more than ten years old95%1 January 2025
Newly built homes added2532025
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)

Describe roof and attic-floor changes together

Planning more space beneath the roof and a different attic layout? Identify existing dormers to be retained, the roof area changing and any proposed change in floor use. A sketch of the desired space helps explain the connected proposal; it should not preselect beam sizes or a structural solution.

  • Existing roof drawings and later alterations with identifiable file numbers.
  • Sketch of the proposed roof shape and attic layout.
  • Available floor drawings and sections, listing missing records separately.

Calculation for your project

Discuss my building plans

Hilversum compared with the province of Noord-Holland

With 94,393 residents, Hilversum ranks 8 among the 44 municipalities in Noord-Holland, from largest to smallest population. The municipality accounts for 3.1% of the province’s housing stock and 1.7% of its land area. This shows the relationship between the number of homes and the area within this municipality.

Calculated population density in Hilversum is 2,070 residents per km² of land, compared with 1,124 for the province of Noord-Holland. 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 HilversumProvince of Noord-Holland
Population94,3932,992,016
Housing stock43,8941,420,068
Land area (km²)45.612,662.54
Calculated residents per km² of land2,0701,124

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 Hilversum, map unit gHd30 covers the largest measured area of soil polygons in this analysis: 628 hectares, or 20.6% of the mapped area.

Original Dutch source name:

Haarpodzolgronden; grof zand

Soil map 2025 — intersection with the area boundary
Map codeDutch soil classification: first unitArea (ha)Share of mapped area
gHd30Haarpodzolgronden; grof zand62820.6%
Hn21Veldpodzolgronden; leemarm en zwak lemig fijn zand59519.5%
gY30Holtpodzolgronden; grof zand33811.1%
cHn21Laarpodzolgronden; leemarm en zwak lemig fijn zand33210.9%
Hd21/Zd21Haarpodzolgronden; leemarm en zwak lemig fijn zand31810.4%
Other unitsOther mapped soil polygons83627.4%

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 Hilversum. 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 openingFacade 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 Hilversum, start with the building address and proposed alteration. For work in an apartment: which storey is involved, which floors bear on the wall and which building drawings are available?

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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