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Structural engineer in Bloemendaal

Preparing an extension or wall opening in Bloemendaal, Overveen, Aerdenhout, Vogelenzang or Bennebroek? Identify the building phase you intend to change. The original house, an existing extension and your new proposal may each require different drawings.

Your building project

Planning changes to a property in Bloemendaal?

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

Bloemendaal: compare the original and proposed building phases

  1. Search by alteration year

    The municipality directs records from before 2009 to the Noord-Hollands Archief and records from 2009 onwards to its own request route.

    Practical step: Make a short timeline of the original building and subsequent extensions. If records are missing, ask where that particular building phase is held.

    Official source · Gemeente Bloemendaal — bouwdossiers
  2. Identify the building element

    Bloemendaal allows requests to specify original records, a later alteration or structural information.

    Practical step: For example, explain that the proposal affects the rear wall between the house and extension. Request available sections and structural records for both parts; an elevation alone does not answer that question.

    Official source · Gemeente Bloemendaal — bouwdossiers
  3. Check the heritage context

    The municipal heritage page covers both protected monuments and properties in a protected village conservation area.

    Practical step: Record any designation affecting the address and add available information to your proposal. Have heritage and permit questions considered separately; a structural calculation does not automatically grant permission.

    Official source · Gemeente Bloemendaal — monumenten

Municipal information checked on 31 October 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 Bloemendaal, Statistics Netherlands (CBS) records 23,592 residents and 10,389 homes on 1 January 2025. Single-family homes make up 72% of the stock; dwellings in multi-unit buildings account for 28%. 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, 0.8% of residents live in the municipality of Bloemendaal. The settlement classification dated 1 January 2026 lists 5 settlements here. These include Aerdenhout, Bennebroek, Bloemendaal, Overveen. The population and housing figures on this page cover the entire municipality, including these settlements.

Bloemendaal — municipal figures
CharacteristicNumber or shareReference date or period
Population of the entire municipality23,5921 January 2025
Homes10,3891 January 2025
Single-family homes72%1 January 2025
Dwellings in multi-unit buildings28%1 January 2025
Homes more than ten years old95%1 January 2025
Newly built homes added52025
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)

Prepare a new opening between the house and extension

Planning to connect an existing extension to the living room? Mark the proposed opening on a copy of the current floor plan and place the proposal alongside it. Identify which extension already exists and which is still to be built. This makes it clear whether the enquiry concerns one opening or several related changes.

  • Floor plan clearly distinguishing existing and proposed work.
  • Record dates and received drawings for both house and extension.
  • List of missing documents and any heritage information.

Calculation for your project

Discuss my building plans

Bloemendaal compared with the province of Noord-Holland

With 23,592 residents, Bloemendaal ranks 30 among the 44 municipalities in Noord-Holland, from largest to smallest population. The municipality accounts for 0.7% of the province’s housing stock and 1.5% of its land area. This shows the relationship between the number of homes and the area within this municipality.

Calculated population density in Bloemendaal is 593 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 BloemendaalProvince of Noord-Holland
Population23,5922,992,016
Housing stock10,3891,420,068
Land area (km²)39.772,662.54
Calculated residents per km² of land5931,124

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 Bloemendaal, map unit Zd20A covers the largest measured area of soil polygons in this analysis: 1,566 hectares, or 48.1% of the mapped area.

Original Dutch source name:

Kalkhoudende duinvaaggronden; fijn zand

Soil map 2025 — intersection with the area boundary
Map codeDutch soil classification: first unitArea (ha)Share of mapped area
Zd20AKalkhoudende duinvaaggronden; fijn zand1,56648.1%
Zn50A/Zd20AKalkhoudende vlakvaaggronden; matig fijn zand60018.4%
pZg21Beekeerdgronden; leemarm en zwak lemig fijn zand2939.0%
Zb21Vorstvaaggronden; leemarm en zwak lemig fijn zand2858.8%
EZ50AKalkhoudende enkeerdgronden; matig fijn zand1755.4%
Other unitsOther mapped soil polygons33810.4%

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 Bloemendaal. 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 Bloemendaal, 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.

Discuss your project
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