Alter BTP
Alter BTP is a French construction and public works company based in Colmar, Alsace, delivering integrated terrassement, voirie, sanitation, industrial gros œuvre, and depollution services to municipalities and private industrial clients across the Grand Est region.
- Company typePrivate
- Founded1946
- HeadquartersColmar, France
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Alter BTP does
Alter BTP (doing business as Alter Travaux Publics) is a French construction and public works company headquartered in Colmar, Alsace, with continuous operations since 1946. The company delivers a portfolio of six integrated services: general public works (travaux publics), terrassement (earthworks), voirie (road infrastructure), assainissement et eau potable (sanitation and drinking water networks), gros œuvre industriel (industrial structural work), and dépollution (soil decontamination). Its technical stack includes an in-house design bureau (bureau d'études), an independent soil and materials analysis laboratory, specialized testing equipment (ITV camera inspection, penetrometer, Coprec water-tightness testing, water disinfection and analysis), and material recycling capabilities (GNT1, GNT3). The company also holds public authorizations for the transport and temporary storage of polluted soils, and partners with Céterra for in-situ remediation techniques.
Alter operates on a project-based contract model, serving primarily government and municipal clients (water supply networks, sanitation systems, road construction) and private industrial customers (foundation construction, industrial concrete work, site depollution and brownfield rehabilitation). Pricing is quote-based per project with multi-year contract cadences typical of public infrastructure work. The company is a member of the Zénith union of companies, a strategic alliance of Alsace-based construction firms whose members collaborate on projects outside their primary geographic or capability scope. Distribution is direct via sales-led engagement with public entities and industrial buyers across the Grand Est region.
Alter is privately held under Managing Director Émilien Arnaud, with no external investment, institutional ownership, or public capital structure. The firm employs approximately 80 people and reports revenue in 'constant progression,' though no financial figures are disclosed. It has received regional distinctions from the Ordre des Architectes in 2009 and 2010. Headcount data shows a discrepancy between firmographic records (16) and the company's own statements (~80), which should be investigated by any prospective acquirer or investor.
Alter BTP firmographics
Firmographics- Name
- Alter BTP
- Legal name
- Alter
- Website
- https://alter-tp.eu
- Company type
- Private
- Founded year
- 1946
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Alter BTP is a French construction and public works company based in Colmar, Alsace, delivering integrated terrassement, voirie, sanitation, industrial gros œuvre, and depollution services to municipalities and private industrial clients across the Grand Est region.
- Ownership category
- akta.pro rank
Alter BTP industry classification
Industry- Product category
- Civil Engineering and Public Works Construction
- NAICS
- Hazardous Waste Treatment and Disposal (562211)
- SIC
- Heavy Construction Other Than Bldg Const - Contractors (1600)
- akta.pro primary industry
- Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations) (EUAEADAA)
- akta.pro secondary industry
- Construction & Demolition (C&D) Debris Transfer & Processing (EUAIABAB)
Keywords
Where Alter BTP is headquartered
LocationHeadquarters
- HQ city
- Colmar
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
Alter BTP business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Infrastructure, Supply Chain
Revenue model
- Public Works Projects: Project-based revenue from civil engineering and public works including terrassement, sanitation networks, water supply, road construction, industrial concrete work, and depollution services. Revenue is generated through direct contracts with public entities (municipalities, government) and private industrial clients for infrastructure projects. The company operates on a one-time project basis with clients throughout the Grand Est region.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Project-based construction services |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
Alter BTP product offering
Product offeringCore offering
Alter BTP is a Colmar-based construction and public works contractor that carries out earthworks, sanitation and water network installation, road construction, industrial structural work, and soil decontamination. The company serves primarily municipalities and private industrial clients in the Alsace region of France, delivering projects from design through execution with in-house laboratory and inspection capabilities.
Product overview
Alter BTP is a construction and public works company offering a unified portfolio of six interconnected services. The core offering centers on terrassement (earthworks), complemented by specialized services in assainissement et eau potable (sanitation and drinking water networks), voirie (road infrastructure), gros œuvre industriel (industrial structural work), and dépollution (decontamination). The company operates a design office (bureau d'études) enabling upstream project conception, allowing it to deliver projects 'clé en main' (turnkey). As a member of the Zénith business union, Alter can extend its service capabilities through partner companies when required.
Differentiator
Problem solved
Functional benefit
Products and services
- Earthworks (Terrassement)
Quantifiable outcome
- Quality work with respected deadlines as fundamental company requirement
- +2 more outcomes
Companies that use Alter BTP
Customer profileNamed customers2 records
Segments3 records
Ideal customer profiles2 records
Alter BTP technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Alter BTP partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- CéterracorePartnership for in-situ soil depollution techniques. Céterra provides specialized treatment technologies that complement Alter's excavation and evacuation capabilities for rehabilitation of industrial brownfield sites. This partnership enables Alter to offer comprehensive depollution solutions including on-site treatment methods.
- Zénith Union of CompaniescoreAlter is a member of the Zénith union of companies, a strategic alliance of construction and public works firms based in Alsace. The union enables member companies to offer comprehensive services by collaborating on projects that require additional expertise or capacity. Alter can turn to Zénith partners when working outside their primary region or when projects require specialized expertise beyond their own capabilities.
Scale indicators4 records
Recent moves9 records
Expansion highlights5 records
Alter BTP competitors and assessment
Company assessmentBroad incumbents
- Bouygues Construction: Major French contractor covering building, civil works, and energy/infrastructure. Overlaps with Alter's gros œuvre industriel and terrassement but at national/international scale.
- Eiffage Génie Civil: Division of Eiffage covering major civil engineering, earthworks, and infrastructure. Competitor on larger tenders and analogous in earthworks/voirie capabilities.
- Vinci Construction: Global construction arm of Vinci active in civil engineering, infrastructure, and environmental works. Competes with Alter on large infrastructure tenders and operates across all of Alter's core service lines.
- Colas (Bouygues): World leader in road construction and maintenance. Overlaps directly with Alter's voirie offering but operates at vastly larger scale and within the broader Bouygues portfolio.
- Eurovia (Vinci): Vinci subsidiary specialized in transport infrastructure and urban development. Comparable voirie and assainissement activities but as part of a global concessions-led group.
Direct peers
- Razel-Bec (Fayat): French civil engineering contractor within Fayat group covering earthworks, roads, and infrastructure. Direct competitor on public works tenders across France.
- Spie batignolles: French civil engineering and construction group active in terrassement, infrastructure, and energy/environment works. Operates a comparable multi-business public works portfolio.
- Charier: Family-owned French regional construction group operating in terrassement, VRD, and environmental works. Strong analogy as a multi-decade, regionally anchored PME in public works.
- Demathieu Bard: Independent French construction group with strong regional roots and capabilities across civil works, industrial building, and infrastructure — comparable integrated offering.
- NGE (Nouvelles Générations d'Entrepreneurs): Major French multi-specialist civil works group offering terrassement, réseaux, voirie, and environmental services. Closely comparable full-service public-works model, though at national scale.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
Alter BTP social profiles
Digital presenceAlter BTP compliance and trust
Trust signalCompliance1 record
Alter BTP financial estimates
Financial estimateRevenue estimate
Valuation estimate
Alter BTP leadership team
Management profileNumber of profiles
Profiles1 record
Alter BTP funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Alter BTP M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Alter BTP
What does Alter BTP do?
Alter BTP is a Colmar-based construction and public works contractor that carries out earthworks, sanitation and water network installation, road construction, industrial structural work, and soil decontamination. The company serves primarily municipalities and private industrial clients in the Alsace region of France, delivering projects from design through execution with in-house laboratory and inspection capabilities.
Is Alter BTP a public or private company?
Alter BTP is a private company. It is classified as family owned and is currently operating.
When was Alter BTP founded?
Alter BTP was founded in 1946. It employs 11 to 50 people.
Where is Alter BTP based?
Alter BTP is headquartered in Colmar, France, in the Europe region.
How does Alter BTP make money?
One revenue line is on record: public Works Projects.
Who are Alter BTP's main competitors?
Broad incumbents on record are Bouygues Construction, Eiffage Génie Civil, Vinci Construction, Colas (Bouygues) and Eurovia (Vinci). Direct peers are Razel-Bec (Fayat), Spie batignolles, Charier, Demathieu Bard and NGE (Nouvelles Générations d'Entrepreneurs).
Does Alter BTP have an API?
No public API is recorded for Alter BTP.
What industry is Alter BTP in?
Alter BTP's product category is Civil Engineering and Public Works Construction. Its primary akta.pro industry code is EUAEADAA, Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations), with a secondary code of EUAIABAB, Construction & Demolition (C&D) Debris Transfer & Processing. Its NAICS code is 562211 and its SIC code is 1600.