What Diag + does

Diag+ is a private property diagnostic services firm headquartered at 15 rue Charles Mangold, 24000 Périgueux, in the Dordogne department (24) of the Nouvelle-Aquitaine region, France. Founded in 2017 by Jean-Marie Descarpentries as the successor to his earlier firm BCI (Bureau Contrôle Immobilier, 2006), the company delivers mandatory and voluntary technical diagnostics required by French law for real estate transactions, rentals, and construction projects. The company is led by Grégory Pfrimmer alongside a self-described team of 8 collaborators (firmographic data lists 97 employees, an unresolved discrepancy). Share capital is €3,000 and there is no institutional investor or parent ownership.

Diag+ organizes its offering into three service poles: (1) Residential Real Estate Diagnostics covering DPE, termites, asbestos, lead (CREP), gas and electricity, ERP, and Loi Carrez/Boutin surface measurement; (2) Professional Building Diagnostics including DTG, soil pollution studies, and waste management diagnostics (SOGED); and (3) Geotechnical Soil Studies (G1 and G2) added in 2021 in response to the 2020 ELAN law mandating soil studies before land sales in clay-risk zones. The firm holds Cofrac (Comité Français d'Accréditation) certification guaranteeing diagnostician qualifications, particularly for asbestos detection. All services are delivered on-site at the customer property by certified personnel.

The revenue model is per-diagnostic, quote-based pricing (devis gratuit) with no subscription or recurring component. The GTM is direct-to-customer — phone, email, and a website contact form — supplemented by word-of-mouth referrals from the Dordogne real estate ecosystem (notaries, agents, property managers). Geographic reach is confined to a single French department, Dordogne, with no documented expansion plans beyond the region. There is no disclosed revenue, no funding history, no proprietary technology platform, and no AI components; the business is fundamentally a local, certified, labor-intensive services firm anchored by regulatory demand.

Name

Diag +

Legal name

DIAG+

Website

https://diag-plus.net

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

51–100 employees

Short description

Diag+ is a Cofrac-certified property diagnostic services firm in Dordogne, France, providing mandatory real estate diagnostics (DPE, asbestos, lead, termites, gas/electricity), professional building diagnostics (DTG, soil pollution, waste management), and geotechnical soil studies for individuals and real estate professionals.

Ownership category

akta.pro rank

Product category

Property Diagnostics Services

NAICS

Surveying and Mapping (except Geophysical) Services (541370), Waste Management and Remediation Services (562)

SIC

Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Soil & Terrain Mapping Services (EC/EM Scanning, Topography, Zone Delineation) (AFACACAE)

akta.pro secondary industry

Brownfield Redevelopment Due Diligence & Grant Support (EUAHAEAD)

Keywords

• Property diagnostics
• Real estate inspections
• Building surveys
• Soil studies
• Energy performance certificates

Headquarters

HQ city

Périgueux

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, Others

Revenue model

1. Property Diagnostics Services: Diag+ provides a range of one-time diagnostic services for real estate transactions (sales and rentals) and construction projects. Revenue is generated through per-diagnostic fees charged to property owners, landlords, and real estate professionals. No recurring or subscription revenue model is indicated.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Diag+ provides mandatory property diagnostics for French real estate transactions and rentals (DPE, termites, asbestos, lead/CREP, gas and electricity, ERP, Loi Carrez/Boutin), professional building expertise (DTG, soil pollution studies, waste management diagnostics), and geotechnical soil studies (G1 and G2) required under La loi ELAN. Services are delivered on-site in Dordogne (department 24) by Cofrac-certified diagnosticians and are billed per engagement on a quote-based model.

Product overview

Diag+ is a property diagnostic services company operating three interconnected service poles: (1) Residential Diagnostics offering mandatory property diagnostics including DPE, termites, asbestos, lead, gas/electricity, ERP, and surface measurements (Loi Carrez/Boutin); (2) Professional Diagnostics serving building professionals with DTG, soil pollution studies, waste management diagnostics, asbestos, and lead; and (3) Geotechnical Soil Studies (G1 and G2) for land transactions and construction projects under La loi Elan. The services are provided by certified diagnosticians and form complete technical files (DDT) required for property transactions and rentals.

Differentiator

Problem solved

Functional benefit

Products and services

• Diagnostic DPE (Energy Performance Certificate) Diagnostic de Performance Énergétique (Energy Performance Certificate) assigning an energy class from A to G, required for residential property sales and rentals.
• Diagnostic Termites Detection of termites and wood-boring insects in properties, required for sales in areas designated by prefectural order.
• Diagnostic Amiante (Asbestos) - Residential Asbestos detection in residential properties built before July 1, 1997, required for sales and rentals as part of the technical diagnosis file (DDT).
• Diagnostic Plomb (CREP) - Residential Constat de Risque d'Exposition au Plomb (Lead Exposure Risk Report) for residential properties built before 1949, measuring lead concentration in coatings.
• Diagnostic Gaz & Électricité

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Apave: Major French TIC group offering building diagnostics, asbestos/lead audits, environmental and geotechnical services across industrial, commercial, and residential markets. Comparable to Diag+ on the professional diagnostics, DTG, and soil-study poles, but competes from a much larger diversified platform.
• Bureau Veritas: Global testing, inspection, and certification (TIC) leader with substantial French operations covering building diagnostics, asbestos, lead, and environmental compliance. Comparable as a broad incumbent that competes for larger real-estate professional accounts and DTG mandates, but operates as part of a much wider portfolio rather than specializing in Diag+'s niche.

Direct peers

• Allodiagnostic: National French network offering the complete mandatory diagnostics bundle (DPE, asbestos, lead, termites, gas, electricity, ERP, surface measurements) for residential and commercial real estate. Comparable because it targets the same individual-property-owner and real-estate-professional segments as Diag+ with similar standardized service lines.
• SOGEXPERT: French geotechnical and environmental engineering firm offering soil studies (G1/G2), soil pollution diagnostics, and waste/demolition management services. Comparable to Diag+'s professional and soil-study poles, particularly for B2B clients in demolition and industrial site transactions.
• Diag Précision: French property diagnostics company offering the standard residential diagnostic suite plus professional services. Comparable to Diag+ in service scope and target customers (individual owners and real-estate professionals requiring DDT compliance files).
• AC Environnement: Major French group specializing in real-estate diagnostics, technical building audits (DTG), asbestos, and lead with a national agency network. Comparable to Diag+ across all three poles (residential diagnostics, professional diagnostics, and technical audits) and represents the most likely competitive threat in any department AC Environnement chooses to enter.
• Ginger CEBTP: Major French geotechnical and soil-engineering firm offering G1, G2, and beyond-phase studies for construction and land transactions. Comparable to Diag+ on the geotechnical soil-studies pole (G1/G2 mandated by the Elan law), though at a much larger national scale.
• Agenda Diagnostics: France's largest network of independent property diagnosticians, offering the full suite of real-estate diagnostics (DPE, asbestos, lead, termites, gas/electricity, ERP, Loi Carrez/Boutin) plus complementary services. Comparable because it competes head-on with Diag+ on the same standardized diagnostic portfolio, only at a national-network scale.
• Fondasol: Leading French geotechnical engineering group providing G1/G2 soil studies, soil pollution diagnostics (Phase 1/2), and site investigations for construction and land development. Comparable to Diag+ on the soil-study and soil-pollution service lines that emerged from the Elan law and industrial-site compliance requirements.
• DEFIM: French national diagnostic network (Cabinet Defim / DEFIM) providing real-estate diagnostics, DTG, and technical building audits through affiliated local diagnosticians. Comparable because it operates a similar model combining local delivery with a national brand, marketing platform, and training infrastructure that Diag+ lacks.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/diagplusdiagnosticimmo

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Diag +