Don’t buy blind. Independent technical inspections for property buyers in Düsseldorf, saving you unnecessary hidden costs of up to €100,000.
We do not sell property. We give you the technical insight to make calculated decisions, negotiate the price, and understand exactly what you are buying.

Remember, purchasing property is one of the largest investments we make in our lifetime, let’s do it right!
See our full services below ↓
Alice CarpenterIndependent certified BausachverständigeDESAG B/250907
Load-bearing walls, settlement cracks, structural integrity.
Tiles, flashing, insulation, timber condition.
Rising damp, condensation, water ingress, measured, not guessed.
Wiring age, safety standards, capacity.
Pipe condition, drainage, water pressure.
Seals, frames, thermal performance.
Thermal bridges, U-values, Energieausweis plausibility.
Structural versus cosmetic, and which is which.
Boiler age, radiators, air exchange.
Independent floor-area measurement and verification.
Render, balconies, drainage, boundary structures.
Visible mould, humidity levels, ventilation adequacy.
Every finding in the report is backed by a reading, surface moisture, infrared temperature, humidity, structure. If a wall is damp, you’ll know how damp, how far, and what it costs to fix.
Capacitive moisture mapping · infrared thermometry · thermal imaging included · endoscope inspection








I’m Alice Carpenter, Baugutachterin and Building Surveyor with an RICS-accredited BSc. I arrive with a thermal camera and moisture meters, I go into the cellar, I get onto the roof, and I read the minutes of the Eigentümerversammlung, because the most expensive thing in a German purchase is rarely the crack you can see. Then I tell you, in plain English, exactly what you are buying: the good, the bad, and the expensive.
British training, continental practice. Before ABC Experts I worked for boutique technical due-diligence firms across the DACH region, which is why every finding in my reports carries a number rather than an adjective. I work exclusively for buyers and owners, never for the seller, never for the contractor whose work I am assessing.
Deutsche Sachverständigen Gesellschaft. Entered in the expert registers; professional ID as a tested and recognised expert.
Verify certificate →
Personal certification seal B/250907. Valid through 09/2027.
Berufsfachverband für das Sachverständigen- und Gutachterwesen e.V., DE-B-18092507.
Home to Europe's largest Japanese community, major international corporations (Henkel, Vodafone, L'Oréal), and a thriving expat scene. Average prices in prime districts reach €4,000-5,500/m². An independent Baugutachten protects your investment in this competitive market.
Düsseldorf's elegant Gründerzeit apartments in Oberkassel and Carlstadt feature ornate stucco facades that often conceal Feuchtigkeit (moisture damage) and outdated infrastructure. Trendy conversions in Flingern and Unterbilk can hide structural compromises behind stylish finishes. New developments along the Rheinufer and in the MedienHafen may have Baumängel (construction defects) masked by premium presentations.
If you're on a 3-5 year corporate posting and buying your first German property, the process can feel overwhelming. A Makler won't flag the Feuchtigkeit in the Keller. We will, fluent in both German and English, we deal with sellers, developers, and Hausverwaltungen in German, then give you the full picture in plain English so you can make informed decisions under time pressure.
We don't just write a Gutachten and disappear. We support you through the entire Immobilienkauf (property purchase), helping you navigate the Notar appointment, understand your rights under German Baurecht (building law), and identify Sanierungskosten the seller should cover.
Clients have used our findings as costed, documented evidence when renegotiating. In Munich, where prices are among Germany's highest, the savings potential is even greater.
| Defect | How often we find it | Typical repair |
|---|---|---|
| Moisture in walls or floor build-upFailed seals, old leaks, condensation traps, often behind new finishes | Very common | €4,000-35,000 |
| Roof and flat-roof waterproofing at end of lifeLooks fine from the ground; the bill arrives with the next storm | Common | €20,000-90,000 |
| Windows past service lifeSeals, frames, condensation and heat loss across a whole flat | Common | €7,000-40,000 |
| Heating or hot-water plant near replacementAge alone decides this, and the GEG rules decide what may replace it | Common | €12,000-45,000 |
| Electrical installation not to current standardOld wiring, insufficient capacity, missing RCD protection | Occasional | €5,000-25,000 |
| Underfunded InstandhaltungsrücklageThe building’s works are coming; your share arrives as a Sonderumlage | Very common | €8,000-80,000+ |
| Structural movement or settlementRare, but the one finding that can end a purchase | Rare | €25,000-150,000+ |
A Viewing Check starts from €450, a Red Flag Check with traffic-light dashboard report from €650, and a full Baugutachten from €850. All prices are final, VAT exempt per §19 UStG (Kleinunternehmerregelung). If you're buying as an investment, inspection costs are typically tax-deductible as Werbungskosten.
Yes. Our report documents every defect with photos, estimated repair costs, and technical assessments. We also support you through the negotiation, helping you push back on the seller, understand your rights under German Baurecht, and identify cost reductions.
A Bauabnahme is the formal handover of a new-build from the developer. Once you sign the Abnahmeprotokoll, defects become your problem. We attend the handover, document every defect in English, and ensure nothing gets signed off until it's properly fixed. Especially important for MedienHafen and Rheinufer developments.
Yes. We provide Verkehrswertgutachten (market value assessments) for divorce settlements, dividing an inheritance and co-ownership buyouts, by agreement between the parties. These are independent valuations for your own decisions and negotiations. Valuations the Finanzamt must formally accept under §198 BewG require the Gutachterausschuss, a publicly appointed (ö.b.u.v.) expert or an ISO 17024 certified valuer, so we refer those on.
We reply within one working day with the next available Düsseldorf dates. After the inspection, your written report arrives within 24 hours, photos, ratings and repair costs included. If your offer deadline is tight, say so; we can often accommodate it.
Yes, and we encourage it. Walking the property together is worth half the report: you see every finding in place and can ask anything on the spot. If you cannot attend, we call you afterwards and walk you through the findings one by one.
Ideally: the listing, floor plans, minutes of the Eigentümerversammlung from the last three years, the Instandhaltungsrücklage statement, the Energieausweis, and any past damage or repair reports. Do not worry if you have only part of this, we will tell you exactly what is missing and why it matters.
Send the listing or address through the form below or by WhatsApp. Within one working day you receive the next available Düsseldorf dates and a fixed price. No obligation, and no payment until the date is confirmed.
Yes. ABC Experts is a DESAG-certified Bausachverständige offering building inspections across Düsseldorf and the wider Rheinland. All reports are in English. We cover Oberkassel, Kaiserswerth, Flingern, Unterbilk, Carlstadt, Golzheim, and all surrounding districts.
Absolutely. Many of our Düsseldorf clients are on corporate relocation packages, Japanese executives, American managers, British finance professionals. We provide fast-turnaround inspections and document reviews entirely in English, so you can make confident property decisions within your relocation timeline.
We cover all of Düsseldorf, Oberkassel, Kaiserswerth, Flingern, Unterbilk, Carlstadt, Golzheim, Pempelfort, Derendorf, MedienHafen, and the wider Rheinland region. If you're looking at property anywhere in the Düsseldorf area, we can inspect it.
Yes. We offer estate management for international owners, annual inspections, maintenance oversight, contractor coordination, and CapEx planning, all in English. Think of us as your trusted eyes on the ground in Düsseldorf.
Düsseldorf's ornate Gründerzeit buildings in Oberkassel and Carlstadt often conceal moisture damage behind stucco facades, outdated electrical wiring, insufficient insulation, and plumbing that hasn't been updated in decades. The beautiful facade doesn't tell you the full story, our thermal cameras and moisture meters do.
Twelve areas: foundation and structure, roof and attic, moisture and damp, electrical systems, plumbing, windows and doors, insulation and energy, walls and cracks, heating and ventilation, Wohnfläche and layout, façade and exterior, and mould and air quality. Every finding is photographed, rated traffic-light style and given a repair cost estimate, plus a review of the sale documents and the Eigentümerversammlung minutes.