The smartest route to your NWWI
Avoid delays or hassles with your mortgage. We deliver a certified, independent report compliant with the latest
Your valuation in 3 simple steps
Fast, transparent, and completely stress-free.
Enter postal code
You will immediately see a clear, flat rate tailored to your area.
Home inspection
A trusted local appraiser inspects your property inside and out.
Report within 48h
Receive your officially validated report swiftly and digitally.
Which valuation fits your situation?
Always one clear flat rate. No unexpected fees later and guaranteed bank acceptance.
Desktop Valuation
Ideal for restructuring or refinancing your current mortgage.
- Fully digital via your computer
- Delivered within 24 hours
- Limited acceptance (verify with your bank)
Why more and more buyers choose us.
The traditional way of valuing a home is far too slow and opaque for today's market.
The Old Way
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Hidden Costs
Prices are often advertised excluding VAT and validation fees. The final invoice is therefore a nasty surprise.
- ✕
Long Wait Times
It often takes weeks for an appraiser to schedule a visit. Finalizing the report then takes even longer.
- ✕
Outdated Guidelines
Traditional appraisers are often unfamiliar with the latest 2026 foundation and sustainability regulations.
SlimmeTaxatie
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One Flat All-in Rate
You pay one transparent flat fee. This includes VAT and all NWWI validation costs. No hidden fees.
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Fast Visit Within 3 Days
Our local certified appraiser schedules a physical inspection within 72 hours of your booking.
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Guaranteed Bank Approval
We deliver a comprehensive report integrating all 2026 checks. Lenders approve it on the first try.
Calculate your interest leakage
Traditional appraisers keep you waiting for an average of 3 weeks. Discover how this delay costs you unnecessary money every single day based on your mortgage interest and contractor rates.
Based on 4.0% bridging interest per year on your mortgage sum. As long as the appraisal report is missing, you pay this interest twice (for both your old and new home).
You pay high bridging interest to the bank daily as long as your final mortgage is not finalized due to the missing appraisal report.
The Smart Alternative
With SlimmeTaxatie, the property visit is scheduled within 72 hours, and your validated NWWI report is delivered within 48 hours after that. Your leakage is only €132.
Expertise that
protects your value.
Foundation Integrity
Lenders require absolute clarity on the property's subsoil stability. Our specialists verify this in advance and document it clearly.
Higher Property Value
We calculate the post-renovation value immediately, granting you extra borrowing power for insulation, solar panels, or a heat pump.
Clarity
upfront.
Have a question about your specific situation? Our experts are happy to help in clear, accessible language.
Yes. All of our reports hold the official NWWI validation mark, which represents the strictest quality control in the Netherlands. Every Dutch bank and mortgage lender accepts our reports directly.
Very fast! After our register appraiser visits your home for the physical inspection, the complete report is finalized within 48 hours and sent to the NWWI for official validation. You receive it in your email immediately upon completion.
Yes. As of April 1, 2026, registering the foundation stability rating (funderingslabel) is legally required. The appraiser must inspect the foundation's condition and document the score in the final report.