Lamy Expertise

What Lamy Expertise does

Lamy Expertise is a French independent building pathology and real estate valuation firm founded in 1982 by Philippe Lamy and headquartered in Champagne-au-Mont-d'Or (Lyon metropolitan area), operating as a Société par Actions Simplifiée (SAS). The firm delivers technical expertise services across residential property — crack and fissure diagnosis, moisture assessment, technical construction review, market valuation (valeur vénale), reception assistance, pre-acquisition opinions, insured/post-sinistre expertise, and CATEC technical assistance for legal proceedings. Its underlying capability is a methodology that combines structural and building-pathology analysis with market comparison and legal/insurance advisory, delivered by civil-engineering-qualified experts whose signed reports engage professional liability and are usable in court and insurance negotiations.

The firm operates a nationwide France coverage model through a network of locally positioned experts, supported by five regional phone lines, a website quote-request form with a 24-hour response SLA, and a mandataire/franchise-style recruitment platform (mandataire.lamy-group.com). It also maintains a Swiss office in Lausanne. Customers are primarily individual homeowners seeking independent diagnosis of construction defects, pre-purchase risk opinions, and dispute support against constructors and insurers; secondary segments include property managers, condominium management firms (syndics/copropriétés), local authorities, and industrial clients served via a dedicated professional phone line. Revenue is generated through quote-based professional service fees (typical market rate €1,000–€1,850 per crack expertise on a ~110 m² house), with additional revenue streams from a low-cost consultation tier (ChronoConsult, ExpertConsult, EasyExpertise), an Espace Client portal, and a 2021-launched professional training organization business.

The company is founder-led and privately held with no disclosed institutional investors; Stéphane Girois serves as Director General. Distribution leans on organic content marketing (department-level SEO, blog, YouTube channel, Google reviews), with 4.4/5 average rating across 177 reviews serving as a trust signal. Regulatory credentials held by the founder (CECAAM listing, CNEI Charte de l'Expertise Immobilière) reinforce the positioning of structural independence from construction and insurance actors as the firm's core differentiator.

Name

Lamy Expertise

Legal name

Lamy Expertise

Website

https://lamy-expertise.fr

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

11–50 employees

Short description

Lamy Expertise is a France-based independent building pathology and real estate valuation firm, founded 1982, serving individual homeowners, property managers, condominiums, and public authorities with on-site technical expertise, property valuation, and litigation-support services via a nationwide network of qualified experts.

Ownership category

akta.pro rank

Product category

Building and Real Estate Expertise Services

NAICS

Offices of Real Estate Appraisers (531320), Other Scientific and Technical Consulting Services (541690), Management, Scientific, and Technical Consulting Services (5416)

SIC

Services-Engineering Services (8711), Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Real Estate Valuation & Appraisal (BPAHANAC)

akta.pro secondary industries

Construction Progress & Draw Inspection Valuation (BPAJAKAM), Eminent Domain / Condemnation & Litigation Support Valuation (BPAJAKAJ)

Keywords

• Building pathology expertise
• Real estate valuation
• Construction defect diagnosis
• Property technical inspection
• Crack analysis services

Headquarters

HQ city

Champagne-au-mont-d'or

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Expertise Fees - Individual Services: One-time professional service fees charged for individual building and real estate expertise missions (crack analysis, moisture assessment, technical construction review, property valuation). Customers request a personalized quote via the website form or phone. Pricing varies by property type, issue complexity, and required skills. The company mentions a free quote under 24 hours.
2. Expertise Fees - Professional Services: Fee-based expertise services for professional clients including property managers (gestionnaires immobiliers), condominium management companies (copropriétés), local authorities (collectivités), and industrial clients. Dedicated phone line for professionals: 01 82 83 77 19.
3. Low-Cost Consultation Services: Lower-cost consultation offerings including ChronoConsult, ExpertConsult, and EasyExpertise formulas for more accessible real estate analysis services.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

Lamy Expertise sells independent technical building expertise and real estate valuation services to French private property owners and professional clients. Named service lines include crack/fissure analysis, moisture and humidity diagnosis, technical construction expertise, property market valuation, construction-reception assistance, pre-acquisition opinions, insured post-sinistre expertise, and CATEC legal-procedure technical support. Services are delivered on-site by a France-wide network of civil-engineering-qualified experts and billed per mission on a quote basis.

Product overview

Lamy Expertise operates as a unified platform offering building and real estate expertise services. The core offering consists of technical expertise services including Expertise Fissures (crack analysis), Expertise Humidité (moisture analysis), Expertise Technique Construction (technical construction analysis), Expertise Valeur Vénale (property valuation), Assistance Réception (reception assistance), Avis Avant Acquisition (pre-acquisition assessment), and Expertise d'Assuré (insured expertise). Additional services include CATEC for legal procedure support, low-cost consultation options (ChronoConsult, ExpertConsult, EasyExpertise), professional training programs, and an Espace Client client portal. All services are delivered through a network of certified engineers across France.

Differentiator

Problem solved

Functional benefit

Products and services

• Expertise Fissures (Crack Analysis Expertise) Specialized crack and fissure analysis service for property owners facing structural cracks in residential buildings; delivers an independent technical opinion on causes, evolution, structural threats, and repair recommendations.
• Expertise Humidité (Moisture Expertise) Moisture and humidity diagnosis service for property owners experiencing damp, infiltrations, or related building-integrity and health concerns; delivers an independent assessment of causes and impacts.
• Expertise Technique Construction (Technical Construction Expertise) General technical construction expertise for property owners and professionals needing technical, economic, and legal opinions on building disorders, defects, and damage; identifies causes, estimates repair solutions, and establishes liability.
• Expertise Valeur Vénale (Property Market Valuation) Property market valuation service that determines the fair market value of a property using comparison methods, income capitalization, and technical condition analysis; for buying, selling, estate, or legal-proceeding purposes.
• Assistance Réception (Construction Reception Assistance) Reception assistance service that accompanies property owners through the formal reception of a new home, apartment, or construction work, anticipating defects and resisting contractor pressure.
• Avis Avant Acquisition (Pre-Acquisition Opinion) Pre-purchase technical-opinion service for prospective property buyers who want to identify potential defects and risks before signing a purchase agreement.
• Expertise d'Assuré (Insured Post-Sinistre Expertise) Post-loss expertise service that assists insurance policyholders in documenting property damage and obtaining fair compensation from insurers after disasters or damage events.
• CATEC (Conventions d'Assistance Technique et Conseil) Technical and economic assistance service for individuals engaged in court proceedings, helping them present technical evidence to a court-appointed expert per Article 161 of the French Code of Civil Procedure.
• Low-Cost Consultation Services (ChronoConsult, ExpertConsult, EasyExpertise) Tiered affordable consultation formulas providing lower-cost real-estate and building problem analysis, from basic to more comprehensive service levels, for budget-sensitive clients.
• Professional Training Programs (Organisme de Formation) Professional training programs (organisme de formation) for individuals aspiring to become building and real estate experts; shares Lamy's methodology in building pathology and property valuation. Established in 2021.

Quantifiable outcome

• 24-hour callback SLA for customer inquiries
• +2 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• CECAAM (Compagnie des Experts près la Cour Administrative d'Appel de Marseille)coreOthersPhilippe Lamy, founder and President of Lamy Expertise, is listed on the CECAAM registry of court-appointed experts before the Administrative Court of Appeal of Marseille. This listing enables the firm to be appointed as judicial experts in administrative disputes.
• CNEI (Compagnie Nationale des Experts Immobiliers)coreOthersPhilippe Lamy is a signatory of the Charte de l'Expertise Immobilière as a member of the CNEI, the French national body for real estate experts. This affiliation establishes adherence to professional ethics and standards in real estate valuation.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Allodiagnostic: National French network for real estate diagnostics including technical building assessments and pre-purchase inspections. Directly competes with Lamy's Avis Avant Acquisition and reception assistance services through a similar franchise-led model.
• AC Environnement: French building diagnostics specialist offering technical expertise, energy diagnostics, and pre-acquisition assessments across residential and commercial properties. Directly competes with Lamy's crack, moisture, and pre-acquisition services.
• expertise-sinistre.fr: Affiliated French platform coordinating post-disaster multi-trade building expertise. Already an ecosystem partner of Lamy Expertise, addressing the same sinistre/insured-expertise client base.
• Saretec (Sedgwick France): Saretec is one of France's largest post-sinistre (post-disaster) building expertise firms, now part of Sedgwick. It directly competes with Lamy's Expertise d'Assuré service for insurer-mandated and individual post-damage mandates.

Broad incumbents

• Ginger Group: French engineering and geotechnical services group covering building pathology, soil studies, and structural diagnostics. Overlaps with Lamy's technical expertise work but serves a broader infrastructure and environmental client base.
• Socotec: Socotec is a major French technical control and inspection firm offering construction expertise, building diagnostics, and technical advice. It overlaps with Lamy's Technical Construction Expertise and Reception Assistance services as a broader, more diversified incumbent.
• Bureau Veritas: Global TIC (testing, inspection, certification) leader with French operations covering construction technical control, building diagnostics, and real estate due diligence. Provides overlapping capabilities to Lamy as part of a much wider portfolio.

Regional players

• Strego Expertise: French building and real estate expertise firm focused on construction disputes and technical assessments. Comparable to Lamy in services offered though with a more regional geographic footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/LAMYExpertise
• YouTubeyoutube.com/user/lamyexpertise
• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/lamy-expertise-sas

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Lamy Expertise