▲ Renovation type · Conservatory / garden room
PLAN N°SER-2026 / SCALE 1:50 / 06.2026
Conservatory or garden room drawings across the Netherlands
Extra living space with maximum daylight on the garden side. A conservatory at the rear is often permit-free up to 4 m deep. We make the permit-ready drawing from €949 incl. VAT. We plan delivery by arrangement.
A conservatory or garden room is a glass or half-open extension on the garden side of the home, from an open canopy to an insulated extra living room. At the rear a conservatory is often permit-free up to 4 metres deep. Tekenpunt delivers the permit-ready drawing from €949 incl. VAT, planned by arrangement or, with rush, faster for a surcharge. You follow your entire application live in your own online file, from quote to delivery.
A conservatory is a glass or semi-open extension on the garden side of a home. From a simple canopy to a fully insulated additional living space. These are the elements we draw.
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1
Glass roof or roof surface
Laminated safety glass or insulated roof panels. Decisive for heat gain and comfort. For an insulated conservatory: HR++ glazing.
2
Connection to existing facade
The connection between the conservatory and the rear facade of the house. Watertightness and thermal break are critical here.
3
Glass front or sliding facade
The facade infill in an aluminium or timber frame. A sliding door or folding wall creates a seamless transition between inside and outside.
4
Foundation and footings
Light foundation strips or concrete pads, depending on soil conditions. We determine this in the drawing so the contractor can start immediately.
5
Floor and drainage
Tiled floor or polished concrete, optionally with underfloor heating. Rainwater drainage via the roof to sewer or decking.
6
Frame: aluminium or wood
Aluminium is low-maintenance and available in any colour (RAL). Timber gives a warmer appearance and insulates well. We draw both variants.
§02 Quick check
Do you need a building permit?
Four questions, about 30 seconds. No obligation.
1
On which side will the conservatory be?
2
Is your property a (national) listed building?
3
How deep will the conservatory be (measured from the rear facade)?
4
Open veranda or enclosed conservatory?
✓ Good news: probably permit-free
A conservatory at the rear of a non-listed building is often permit-exempt when the depth is a maximum of 4 m and the built-up rear garden area does not exceed 50%. We produce the drawing that complies with the regulations. From €949 incl. VAT. Request a no-obligation quote for your exact situation.
§03 Costs
Calculate your conservatory price
Indicative calculator. The drawing is a fixed price; the construction is carried out separately by a contractor or conservatory builder.
The build itself is then handled by a contractor (not by us):
Indicative construction costs± €26,500
* We handle the design and (if required) the permit. The construction is carried out separately by a conservatory builder or contractor; that amount is an estimate based on the surface area. Request a quote for the exact drawing costs.
Amounts shown are incl. VAT (consumer price); the amount below the total is the amount without VAT. Your personal quote always shows the exact total price.Amounts shown are excl. VAT; the amount below the total is the amount incl. VAT (consumer price). Your personal quote always shows the exact total price.
§04 Packages
Choose your package
Every package includes the drawing. Add structural calculation or the full permit route.
Drawing
from€949 incl. VAT
Existing + new floor plans, elevations, relevant sections and site plan to scale
PDF + DWG files, suitable for the municipality and your contractor
Our own structural engineers and drafters work per Eurocode and check against the Bbl building code; every drawing and calculation is reviewed internally by our checkers before release.
930 projects since 2016, and 90% clears the aesthetics review (welstand) on the first pass — meaning: no design change needed after the municipality's first assessment.
4.9 out of 24 reviews for this type of renovation (36 projects since 2016).
§05 Three variants
Which conservatory suits your home?
From a simple canopy to an insulated extra room. We advise what best suits your use and budget.
Open veranda / canopy
An open canopy on the garden side, with a timber deck or polycarbonate roof. Most affordable, lowest threshold. Seasonal use.
PermitUsually exempt
UseSpring-autumn
Lead timeOn quote
Priceon quote
Semi-open garden room
Partially glazed walls, with one or more sliding doors that can be opened. Flexible in summer and autumn, protects against rain and wind.
PermitUsually exempt
Use3 seasons
Lead timeOn quote
Priceon quote
Insulated conservatory year-round
Fully glazed walls with HR++ glass, insulated roof construction, underfloor heating and mechanical ventilation. A true additional living room that is comfortable even in winter.
PermitCheck required
UseYear-round
Lead timeOn quote
Priceon quote
§06 Comparison
Conservatory vs alternatives
A conservatory adds light and space without sacrificing garden area. Here is how it compares to an extension and a veranda.
Conservatory / garden room
Drawing from €949 incl. VAT
Maximum light entry through glass
6-25 m² extra living space
Indoor-outdoor transition
Often permit-free
Extension (masonry)
Drawing from €599 incl. VAT
Solid facade, less light
6-20 m² living space
Feels like an extension of the home
Permit often required
Roof extension
Drawing from €649 incl. VAT
Full storey on top
20-50 m² extra
Building permit always required
Increases the property value
§07 Situations per type
What is permitted in your situation?
The permit-free rules depend on position, type and surroundings. A few typical situations at a glance.
Site plan
Type
Permit
Price
Check
Rear extension, max 4 m deep, no listed building
Open veranda
Free
On quote
N/A
Rear extension, max 4 m deep, no listed building
Semi-open conservatory
Free
On quote
N/A
Rear side, deeper than 4 m
All types
Required
On quote
Review
Protected townscape
Insulated conservatory
Required
On quote
Strict
Listed building (national or municipal)
Custom work
Required
On quote
Very strict
§08 Case study
Example project: garden room in Bussum
CASE · BUSSUM · 04.2026
Semi-open conservatory adjoining kitchen-diner on garden side
Example project · rear · permit-free · +14 m² bright living space
+14 m² space
0 permit
Fixed price our design
Fast drawing
FOR
SKETCH
3D
NA
Challenge: A family in Bussum wanted to connect their kitchen-diner to the garden via a light, semi-open garden room of 14 m². The existing rear facade had an inviting position but no transition space. They were unsure whether a permit was needed and did not want a process taking months.
Our approach: We calculated that the conservatory at the rear fell within the permit-free limits: less than 4 m deep and the rear garden zone remained well below the 50% coverage threshold. We drew a semi-open garden room in an aluminium frame with a sliding door across the full width and an insulated glass roof.
Result: 14 m² of extra living space that brings light and garden inside, no permit process needed and the drawing was arranged quickly. The conservatory builder could start straight away.
§09 Insulation & info
Year-round use, financing & insulation
A conservatory adds light, but also requires thinking about heat, ventilation and costs. What you need to know for a comfortable choice.
Permit-free?
Rear of the property, non-listed building, max 4 m deep, total outbuildings covering no more than 50% of the rear plot: a conservatory or garden room is often permit-free under the Environment and Planning Act (BBL). An open veranda sometimes has different thresholds. We assess your situation.
SOURCE · BBL / ENVIRONMENT ACT 2026
Insulation for year-round use
Do you want to use the conservatory in winter too? Choose HR++ glazing (U ≤ 1.2), an insulated roof structure (Rc ≥ 3.5) and underfloor heating. Mechanical ventilation prevents condensation. We include this in the drawing so the installer can connect straight away.
ADVICE · HR++ glazing U ≤ 1,2 W/m²K
Financing
A conservatory increases the property value and can be financed within a renovation mortgage (up to 106% of the value after renovation). Ask your mortgage provider about the options for energy-efficient conservatories.
Q01Do I need a permit for a conservatory or garden room?
Often not. A conservatory at the rear, as an ancillary structure within the rear plot area, falls under the permit-free rules of the Environment and Buildings Decree (BBL). You may build up to a maximum of 4 m deep, provided the total area of outbuildings does not exceed 50% of the rear plot area. An open veranda (canopy) sometimes has different threshold values. We check your situation free of charge.
Q02What does a conservatory drawing cost?
A permit-ready drawing for a conservatory or garden room costs from €949 incl. VAT at Tekenpunt. The exact price depends on the complexity, the type of conservatory, and whether you also need a permit or structural calculation. Construction costs via a conservatory builder are indicatively between €20,000 and €50,000 depending on floor area, materials, and insulation level.
Q03How deep can a permit-free conservatory be?
A permit-free outbuilding at the rear may be at most 4 m deep (measured from the original rear facade). The total area of all outbuildings may also not exceed 50% of the rear garden area. Beyond those limits a building permit is required. Stricter rules always apply to listed buildings.
Q04Can a conservatory be used year-round?
It depends on the type. An open veranda or semi-open garden room is seasonal, comfortable from spring through autumn. A fully insulated conservatory with HR++ glazing, underfloor heating, and mechanical ventilation can be used comfortably all year round. We advise on the insulation values and installations required and incorporate this into the drawing.
Q05How long does it take to draw a conservatory?
We plan the drawing by arrangement; rush is available for a surcharge. If a permit is needed, allow a further 8 weeks for the municipal decision period. Depending on the type, the construction itself takes another 2-6 weeks.
Q06Do you work across the Netherlands?
Yes. We draw conservatories and garden rooms across the Netherlands. We do the drawings remotely; any permit is submitted to your municipality. For every municipality we know or check the local rules and aesthetic policy.
◆ Serre / tuinkamer in de praktijk
36 conservatory / garden room projects since 2016
24 clients rated their conservatory / garden room project with an average of 5,0 out of 5 stars. A few of their comments:
MB
Mark B.Deventer · Serre
★★★★★
Geweldige service en duidelijke communicatie.
Conservatory / garden room
JD
J. van D.Rotterdam · Serre
★★★★★
Tekenpunt drew up our conservatory perfectly. Thank you!
Conservatory / garden room
EM
Eva M.Naarden · Serre
★★★★★
Very professional firm. The construction drawings for our conservatory were highly detailed. Exactly what we were looking for, and the contractor could get straight to work.
Conservatory / garden room
KG
Kim de G.Den Haag · Serre
★★★★★
We needed drawings quickly for our conservatory in Den Haag. Tekenpunt handled this fantastically. The environmental permit went through first time.