Expert opinions
What is Real Estate Appraisal?
A property appraisal is a technical report prepared by a specialized engineer for the purpose of documenting damage, defects, failures, or discrepancies relating to a property or technical project. It is used in cases of insurance claims, out-of-court settlements, legal disputes, or for consulting purposes.
It is a powerful tool for owners, tenants, businesses, and lawyers who want to:
prove technical cause or fault
seek compensation or restoration
confirm the suitability or riskiness of a space
obtain official documentation prior to sale, purchase, or renovation
📌 The expert opinion includes:
On-site inspection of the property or facility
Photographic documentation
Recording of findings & analysis of causes
Recommendations for remediation or preventive measures (if requested)
Official technical report signed and stamped by a qualified engineer
The expert witness is the cornerstone for investigating, determining, verifying data, and finally reporting on technical issues that arise in a case..
Call us at 210 – 9801980
What specialties does City Engineering cover?
Our company employs engineers from five different disciplines, enabling us to fully address any technical dispute or damage:
🔹 Civil Engineer
For cracks, collapses, subsidence, moisture, load-bearing structures, structural adequacy
🔹 Architect
For aesthetic, functional, or construction flaws in facades, floor plans, spatial layout
🔹 Mechanical Engineer
For water supply, drainage, firefighting systems, boilers, A/C, electrical and mechanical installation faults
🔹 Surveyor
For boundary disputes, unauthorized fencing, cadastral issues, demarcations & measurements
🔹 Electrical Engineer
For electricity theft, energy losses, faults in electrical networks, and HEDNO violations
📞 Are you considering filing a lawsuit, do you need compensation, or do you want official documentation?
The City Engineering team prepares expert reports recognized by insurance companies, lawyers, and technical services.
Where Expertise is Required – Detailed Case Analysis
An expert opinion (Technical Report / Technical Opinion) is required when you need a documented technical assessment for a property or project: for disputes, damages, poor workmanship, sales, leases, insurance, and/or legal use.
The process includes on-site inspection, measurements where necessary, photographic documentation, technical conclusions, and (when requested) restoration budget.
All cases are listed in detail below:
When there is a problem with moisture/smell/mold and diagnosis of the cause is required (piping, insulation, condensation, etc.).
For assessing cracks in walls/slabs or signs of subsidence and technical assessment of severity and immediate actions.
When there are defects (floors, tiles, plaster, plumbing, electrical, window frames) and technical documentation of liability/repair is required.
For recording damage, technical assessment of cause, and estimation of restoration costs (often useful in insurance/compensation cases).
When neutral technical documentation is required for issues between apartments or common areas.
In cases where cracks/damage appear after work on a neighboring property or construction site.
When you want a technical inspection before delivery (or during) to confirm that the work has been carried out as agreed.
For technical confirmation of quantities/surfaces (e.g., paints, insulation, tiles, repairs) and matching with quotes/invoices.
When you need a documented repair estimate (for negotiation, insurance, court, or private agreement).
So you know what you’re buying: hidden damage, insulation issues, electrical and mechanical installations, potential renovations, and costs.
For “status recording” before the tenant moves in or when they leave (wear and tear, damage, restoration obligations).
When technical documentation is required for damage or wear and tear and assessment of restoration costs.
When there are high bills, cold spots, condensation, and you want a technical cause and solution.
For technical assessment of problems (noise, vibrations, machinery, elevator) and suggestions for solutions.
If recurring faults occur (electrical, plumbing, drainage, air conditioning) and technical diagnosis is required.
When there is disagreement about boundaries, common areas, exclusive uses, or actual space allocation.
E.g., basic accessibility/security requirements for the space and technical documentation for corrective actions.
When there is a safety risk (loose components, detachments, structural problems) and immediate technical guidance is required.
When you need technical “paperwork” to resolve a dispute out of court with clear documentation and figures.
When organized technical documentation (photos, conclusions, cause, recommended measures, cost) is required for use by your lawyer.
What we usually deliver
📍 Autopsy & recording
📸 Photographic documentation
🧾 Technical report with conclusions & justification
💶 (optional) Estimation of restoration costs / quantities
🛠️ Recommended technical solutions & steps
⭐ Why choose us for Expertise?
An Expert Opinion is not just “an autopsy.” It is a technical documentation that must be clear, complete, and reliable, as it is often used in negotiations, insurance, leases, or even legal proceedings.
By choosing our team, you get objectivity, accuracy, speed, and clear conclusions. And that’s because:
We have experienced civil engineers with substantial knowledge of structural, construction, and electrical/mechanical issues, so that the assessment is based on data, not assumptions.
We deliver technical reports with photographic documentation, clear descriptions of findings, justifications, and conclusions, so that you can use them with confidence wherever necessary (private individuals, lawyers, insurance companies).
We undertake the autopsy immediately and deliver the report within a short time, usually within 2–7 business days (depending on the complexity and the available data).
We don’t just record the damage. We suggest realistic technical solutions, restoration steps, and (where requested) cost/quantity estimates so you know “what to do next.”
There is no “fine print.” The fee is clearly calculated based on the type of issue, property size, and required measurements/documentation, so you know from the outset what is included.
We undertake expert assessments in Athens, Thessaloniki, the islands, and the rest of Greece, organizing the inspection and the file according to the case and location.
We have undertaken technical reports for private individuals, property managers, real estate owners, commercial premises, and collaboration with lawyers/law firms, always aiming for a clear, useful, and actionable result.
What is the procedure for Expertise?
The process we follow is simple, well-organized, and designed to give you clear results without any hassle. We follow six clear steps:
Once we receive your request via form or telephone, we will contact you immediately to understand:
• What exactly you want to be documented (e.g., moisture, cracks, poor workmanship, damage, etc.)
• Where the property is located and what it is used for (residential/commercial/apartment building)
• Whether the matter is urgent or has deadlines (insurance/legal)
• Whether measurements/additional checks are required or an on-site inspection is sufficient
📩 Within 24 hours, we will send you a written quote and delivery time.
Our engineer visits the property to:
• Assess the current situation on site
• Take photographs (before/after, where applicable)
• Record symptoms, signs of failure, and possible causes
• Take targeted measurements where needed (e.g., moisture, slopes, surfaces)
This allows us to form a reliable technical conclusion.
We ask the customer for useful information, depending on the case:
Photos/videos (if available before the problem occurred)
• Quotes/invoices for work (in the case of a contractor/renovation)
• Plans/permits/floor plans (if available)
• Event details (e.g., date of leak, rainfall intensity, insurance event)
• Any relevant correspondence (with administrator/neighboring project/contractor)
We take care of the rest.
Our team proceeds with:
• Detailed description of findings
• Photographic documentation with clear references (location/point/cause)
• Technical assessment of cause (where possible)
• Conclusions and recommended technical actions
• (Optional) Estimation of restoration costs/amount of work
📌 The report is written in a clear, useful, and practical manner for individuals, insurance companies, or legal entities.
Once completed:
• We deliver the Expert Report to you in PDF format
• We explain the conclusions to you in simple terms
• We suggest the next steps (technical/practical)
• We issue an invoice for services rendered
If you wish, we can also undertake:
• Consultation/technical support with contractors for restoration solutions
• Second inspection after the work is completed for confirmation
• Technical support in negotiations/settlements
• Support for lawyers with technical clarifications (where requested)
🎯 In short:
You tell us what you want documented – we take care of the inspection, technical analysis, and delivery of a comprehensive expert report, with transparency, accuracy, and speed.
- Trust our specialized staff
- and our many years of experience
- in expert witness cases.
Please call us at 210 – 9801980
Data & Supporting Documents for Expert Opinion (On a Case-by-Case Basis)
Gathering the appropriate data is a key step in producing a valid, clear, and usable expert report. Below is a detailed list of what is required, divided into:
🔵 Data from the client (for our office)
🟢 Documentation & Deliverables prepared by us (Technical Report / Expert Report)
Common Elements for ALL Cases
🔵 From Customer:
Property address & owner/representative contact details
Brief description of the problem (what is happening / since when / where it occurs)
Photos or videos (if available) before/after or during the development of the problem
Any quote/invoice/contract related to recent work (if available)
Floor plan/blueprint (if available) or at least a description of the spaces (e.g., “bathroom next to kitchen”)
Access to the property (appointment & presence of a representative, where required)
🟢 From Us (Deliverables):
On-site inspection & technical recording
Photographic documentation (organized with references to points/areas)
Technical Report/Expert Opinion in PDF format with:
– description of findings
– technical assessment of cause (where possible)
– conclusions
– recommended steps/solutions
(Where necessary) measurements/counts of surfaces or points
(Optional) estimate of restoration costs/quantities of work
Special details PER CASE
💧 Moisture / Mold / Leaks
🔵 From the customer:
When did it appear (date/period) & is it related to rain/use
• Is there a neighboring area with a possible cause (bathroom, terrace, pipes)
• History of previous repairs/interventions
🟢 From us:
• Mapping of moisture spots & evaluation of possible causes
• Proposed technical solutions (plumbing/insulation/ventilation/thermal bridges)
🧱 Cracks / Settlements / Stability Issues
🔵 From the customer:
When were the cracks noticed and do they “open up” over time?
• Have any recent works been carried out nearby (excavations/renovations/heavy work)?
🟢 From us:
• Technical recording of cracks (location/shape/intensity)
• Assessment of severity & recommendations for immediate action/inspections
🛠️ Renovation/Contractor Malpractice
🔵 From the customer:
Offer/contract for work (if applicable)
• Invoices/receipts for materials & work (if applicable)
• Description of what was agreed vs. what was actually done
🟢 From us:
• Technical documentation of defects
• (Optional) counting of work/quantities & restoration estimate
🌧️ Damage from Flooding / Fire / Weather Events (Insurance)
🔵 From the customer:
Date of incident & photos taken immediately afterwards
• Contract/application number (if available) or insurance contact details
🟢 From us:
• Damage report, documentation, and (optional) repair estimate
🏢 Apartment buildings / Disputes between properties
🔵 From the customer:
Which areas are affected (apartment/common areas)
• Any correspondence/minutes/manager’s report (if available)
🟢 From us:
• Neutral technical record & conclusion on cause/responsibility (where documented)
🧾 Leases (property receipt/delivery)
🔵 From the customer:
• Delivery/receipt date & basic terms (if any)
• List of damages/observations (if any)
🟢 From us:
• Technical record of condition & (optional) repair cost estimate
⚖️ Legal use / Lawyer support
🔵 From the client:
What exactly do we want to prove technically (1–2 sentences)
• Relevant documents/background (extrajudicial letters, letters, agreements, photographs)
🟢 From us:
• Structured, clear, and actionable report with conclusions and technical justification
What you DON'T need to look for (we'll take care of that)
We know that in many cases not all the information is available or easy to find immediately. Don’t worry — we’ll go ahead and organize the file based on what we have.
You don’t necessarily need to have:
📐 Old plans/floor plans (if they are not available, we will make a copy where necessary)
🧾 Complete work history (a brief description and any supporting documents are sufficient)
📸 “Perfect” photos (our on-site inspection covers the necessary documentation)
📑 Technical knowledge or terminology (you describe the problem, we translate it technically)
🏢 Contact with third parties (contractors/managers/crews) — if necessary, we take care of the technical communication
At CITY ENGINEERING, we are always by your side, providing excellent expert witness services. We have the appropriate knowledge and we face every challenge with responsibility, respect, and reliability, defending your interests against every challenge.
Administrative & Technical Management – What our office undertakes
Our office organizes the entire expert report, from the inspection to the final delivery, so that you have a clear, documented, and usable result. We undertake:
Full coordination of the case and planning of the inspection
The collection and organization of the data/documents you send us
Technical recording, photographic documentation, and (where necessary) measurements
Drafting the Technical Report/Expert Opinion with clear conclusions
(Optional) Estimating the cost of restoration or the amount of work required
Technical support after delivery (clarifications, next steps, technical consultation with repair crews/contractors)
Where necessary, technical support in collaboration with a lawyer or insurance company (providing clarifications on the findings)
📌 Important: Every case is different. A simple technical opinion is one thing, but a case involving multiple causes, disagreements, neighboring projects, or the need for costing is quite another.
That is why we examine each case individually and tailor our approach and dossier according to the subject and purpose of the report.
Call us at 210 – 9801980
Price list for Expert Reports (Technical Report / Technical Opinion) – City Engineering
Final prices, no hidden charges – mid-range (neither cheap nor expensive).
(Prices do not include 24% VAT)
Main Services (as applicable)
| Type of Expertise | Until 80 sq. m. | 81–150 sq. m. | 151–250 sq. m.. | Above 250 sq. m. |
| 💧Moisture / mold / leaks (diagnosis of cause) | 280 € | 340 € | 420 € | 520 € |
| 🧱 Cracks / subsidence / signs of stability (assessment) | 360 € | 440 € | 540 € | 690 € |
| 🛠️Poor renovation/contractor work (documentation) | 350 € | 430 € | 520 € | 650 € |
| 🌧️ Damage from an incident (flood/weather/fire) – documentation | 330 € | 410 € | 510 € | 650 € |
| 🧾 Delivery/receipt of rent (recording of status) | 220 € | 260 € | 320 € | 390 € |
| 🔎 Property inspection prior to purchase (technical due diligence) | 250 € | 330 € | 420 € | 520 € |
| 🏢 Apartment building disputes / common expenses (neutral documentation) | 380 € | 460 € | 560 € | 720 € |
| ⚖️ Technical report for lawyers / “judicial use” (more rigorous structure) | 450 € | 550 € | 690 € | 850 € |
The price includes
1️⃣ On-site inspection of the property (1 visit)
📸 Photographic documentation (organized by location/area)
📄 Technical Report / Expert Opinion in PDF format with conclusions & recommended steps
📞 Brief explanation of conclusions (by phone)
✉️ 1 round of clarifications (in writing) after delivery
Additional optional services
| Service | Price from |
| 2η inspection/re-inspection after work | 120 € |
| Estimated restoration costs (budget) | 150 € |
| Quantity/work measurement (BOQ) | 180 € |
| Urgent delivery within 24–48 hours | +25% |
| Technical advisor at meeting/negotiation (per hour) | 80 €/hour |
ℹ️ For reference: in the context of expert opinions/expert witnesses, a fee of €85/man-hour + VAT is mentioned as an indicative reference point in relevant publications.
📌 Important
• The above prices refer to typical cases with 1 inspection and standard documentation.
• The final quote may change if multiple inspections, access to multiple locations/properties, or extensive investigation (e.g., multiple points/causes) are required.
Call us at 210 – 9801980
Frequently Asked Questions – Expert Opinions (Technical Report / Technical Opinion)
An expert opinion is a documented technical report by an engineer, which records the condition of a property/damage, evaluates the issue technically, and draws conclusions and recommendations for action.
When there is moisture, cracks, poor workmanship, damage from an incident, disagreements in an apartment building, before buying/renting, or when you need technical documentation for insurance or a lawyer.
It is drawn up by an experienced civil engineer (or, where appropriate, by a suitable engineer) following an on-site inspection and technical assessment.
It is an official technical report signed/stamped by an engineer and can be used by individuals, companies, management, insurance companies, and/or for legal support.
It can be used as technical evidence/documentation. Specific legal proceedings may require special handling or a court-appointed expert—we will guide you through the process.
Delivery usually takes place within 2–7 business days of the autopsy, depending on the complexity and the available data.
Yes. For the report to be reliable, on-site inspection and photographic documentation (and measurements where necessary) are required.
We deliver a PDF technical report, photographic documentation, conclusions, recommended steps, and (if requested) a cost estimate for restoration/quantities.
Not necessarily. If they exist, they help, but we can proceed without them, based on the autopsy and the evidence available.
In many cases, yes, especially when there are clear findings. When a fault has multiple possible causes, we report it technically and suggest the correct way to investigate.
An autopsy is performed at the affected site and, where possible, at the probable site of origin (by mutual agreement). The aim is to produce a neutral and documented record.
Yes, optionally. We can provide a restoration cost estimate and/or a quantity survey.
Yes. We record the condition of the property, any wear and tear/damage, and (if requested) the cost of restoration.
Yes. We carry out technical damage assessment and documentation so that you have a clear picture of the restoration and the cost (where requested).
Yes, optionally. We can participate technically to explain findings and propose appropriate solutions.
This can be done at an additional cost, especially when confirmation is required after work has been carried out or the problem has developed.
We take on cases in Athens, Thessaloniki, the islands, and the surrounding areas, organizing autopsies according to location.
The cost depends on the type of subject, the surface area, and the complexity. There are fixed price categories in our price list, and we always provide a written quote before we begin.
In rare cases with incomplete data or multiple causes, further investigation may be required. In any case, we provide technically documented guidance on the next steps.
Fill out the form or give us a call. We provide a free preliminary estimate, schedule an inspection, and take care of everything until final delivery.
Call us at 210 – 9801980
Some of our Expert Opinions
Our experience is reflected in dozens of technical reports and expert opinions that we have successfully undertaken throughout Greece. From apartment buildings in Athens and commercial spaces in the city center to vacation homes in coastal areas and tourist properties on the islands, we have provided clear documentation, practical solutions, and reliable conclusions.
🔹 Indicative Expert Reports:
💧 Diagnosis of moisture & mold in an apartment in Kallithea, Attica – autopsy, photographic documentation, proposed technical solutions (2024)
🧱 Assessment of cracks in an apartment building in Peristeri – technical recording, severity assessment & immediate actions (2023)
🛠️ Documentation of poor workmanship in a residential renovation in Thessaloniki – recording of defects & restoration budget (2023)
🌧️ Recording of flood damage to a ground floor commercial space in Athens – technical report & restoration cost estimate (2024)
🧾 Apartment lease handover/acceptance report (before/after) – recording of condition & damage (2022)
🏢 Technical documentation of dispute in apartment building (leak/common area) – neutral recording and technical justification (2024)
🔎 Technical inspection before purchasing a property – identification of risks/damage & assessment of necessary interventions (2022)
✨ All cases were accompanied by autopsy, photographic documentation, clear conclusions, and (where requested) restoration budget/next steps.
Some of our clients
The trust of our customers is the greatest proof of the quality of our services. We have worked with:
🔸 Individuals and families
Owners of apartments, houses, and vacation homes
New buyers who want a technical inspection before purchasing
Owners who are dealing with moisture, cracks, or damage and want documentation and a solution
🔸 Professionals and Businesses
Owners of commercial spaces (shops, offices, warehouses)
Owners of tourist properties (Airbnb/Booking) for technical documentation of damage or deliveries
Companies that need a technical report for maintenance/restoration or project disputes
🔸 Agencies and Administrators
Apartment building management (technical issues/leaks/damage)
Real estate companies for due diligence and technical inspections
Lawyers/law firms for technical documentation of cases