Stone and Earth

What Stone and Earth does

Stone and Earth (operating as Pierre et Terre) is a privately held French custom single-family home builder founded in 1989 by Pierre and Jocelyne Dourthe and currently led by President Sébastien Dourthe. The company designs and constructs bespoke individual houses for individual buyers — primarily families, retirees, first-time buyers, and investors — across the Indre-et-Loire (37) and Maine-et-Loire (49) departments, operating three owned sales agencies in Tours, Angers, and Saumur through its primary entity SAS EGB and regional subsidiary SARL DLB. Its technical backbone is the proprietary Pack KeyZen bundle — four rigorous pre-construction studies (geotechnical, structural concrete, thermal, and ventilation) plus a mobile project tracking portal and post-delivery energy consumption monitoring — delivered at no charge and underwritten by an integrated partner ecosystem including SOCOTEC (quality management since 1994), NRGYS (thermal engineering), UBAT CONTROLE (air tightness at 0.5 m³/h/m²), and ARMASOL (geotechnical studies).

The business operates under the CCMI (Contrat de Construction de Maison Individuelle) regulatory framework, which permits legally binding price and delivery-date guarantees that the company advertises as 100% honored across its 3,000+ delivered houses. Revenue is generated primarily through one-time custom home construction contracts (priced from €110,000 for a 75 m² entry-level home up to €210,000+ for a 130 m² premium home, equivalent to €1,400–€2,000 per m²), with progressive upsell via three optional service tiers — IKARI (equipped house), SATORI (interior decoration), and SENSEI (landscaping). Distribution is exclusively direct through in-person agency consultations; no online self-serve purchase motion exists. The company carries a strong regional certification portfolio (first-in-Centre-region NF Maison Individuelle 2000, NF HQE 2007, NF HABITAT 2015, plus PERMEA air permeability 2014) and RE 2020 compliance across all builds, and is a member of LCA-FFB. The company employs 11–50 people and has no disclosed venture capital or external ownership.

Name

Stone and Earth

Legal name

Pierre & Terre – SAS EGB

Website

https://pierre-et-terre.fr

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Stone and Earth (Pierre et Terre) is a privately held French custom single-family home builder founded in 1989, designing and constructing bespoke houses in departments 37 and 49 for individual buyers, families, and retirees, with guaranteed CCMI pricing and proprietary Pack KeyZen technical studies.

Ownership category

akta.pro rank

Product category

Residential Home Construction

NAICS

New Single-Family Housing Construction (except For-Sale Builders) (236115)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Custom Home Building (IMAFABAC)

akta.pro secondary industries

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Residential Landscape Design (HSAIABAA)

Keywords

• Custom home construction
• Individual house builder
• RE 2020 housing
• Turnkey house construction
• Home construction services

Headquarters

HQ city

Tours

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Custom Home Construction Sales (One-Time): Pierre et Terre's primary revenue stream is one-time sales of custom-built individual houses. The company designs and constructs bespoke homes from conception to key handover. Pricing varies by surface area and configuration: 75 m² from €110,000; 110 m² from €145,000; 130 m² from €210,000 (all excluding notary fees, connections, land, and finishes). The CCMI contract guarantees the price, and payment begins only at foundation pouring.
2. Optional Add-On Services (IKARI, SATORI, SENSEI): Three optional service tiers beyond the base house are offered for additional revenue: IKARI (equipped house with chosen kitchen and bathroom + construction management), SATORI (interior decoration service included), SENSEI (landscaping and garden design/execution). These are upsell services bundled with the core construction contract.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Stone and Earth (Pierre et Terre) designs and builds custom single-family houses in the French departments of Indre-et-Loire (37) and Maine-et-Loire (49). Every project is delivered under a CCMI fixed-price contract and includes the proprietary free Pack KeyZen of four technical studies (geotechnical, structural concrete, thermal, ventilation), mobile project tracking, and energy consumption monitoring. Customers can purchase the base construction or add tiered service modules (IKARI equipped house, SATORI interior decoration, SENSEI landscaping) and choose from named house models.

Product overview

Pierre et Terre (Stone and Earth) is a custom single-family house constructor operating in Indre-et-Loire (37) and Maine-et-Loire (49) departments of France. The company offers a unified construction service centered on the KeyZen Pack, which bundles geotechnical studies, structural concrete studies, thermal studies, ventilation studies, mobile project tracking, and energy consumption monitoring. Three add-on service modules—IKARI (equipped house), SATORI (interior design), and SENSEI (landscaping)—provide tiered customization options. The portfolio includes five named house models: Stylis (234 m² contemporary), Nighty (185 m² contemporary), Affiny (100 m² traditional), Felio (120 m² plain-pied), and Tracytio (95 m² traditional). Land search assistance in the Centre-Val de Loire and Pays de la Loire regions complements the core construction service.

Differentiator

Problem solved

Functional benefit

Brands

• KeyZen: Unique, luminous, healthy, and durable house concept offering Pack KeyZen with in-depth studies, project monitoring, and controlled performance
• Ikari
• Satori
• Sensei

Products and services

• Pack KeyZen Proprietary free service bundle included with every house construction, providing in-depth technical studies (geotechnical, structural concrete, thermal, ventilation), mobile project tracking through a personal online space, and energy consumption monitoring to control ecological performance and reduce energy bills. Designed for individual home buyers who want a guaranteed-quality, RE 2020-compliant custom house.
• IKARI (Equipped House) Optional add-on service tier offering an equipped house: the client chooses the kitchen and bathroom, and Pierre et Terre manages the construction through to delivery. Targeted at individual home buyers who want a turnkey, fitted home beyond the base construction.
• SATORI (Styled House) Optional add-on service tier offering interior decoration by a dedicated decorator to enhance and valorize the interior spaces of the house. Targeted at individual home buyers who want professionally styled interiors beyond the base construction.
• SENSEI (Landscaped House) Optional add-on service tier providing full landscaping of the garden and terrace to enhance and add value to the property. Targeted at individual home buyers who want a fully finished outdoor space alongside their custom house.
• Custom House Construction Service Full-service custom single-family house construction from conception through key delivery, including architectural planning, technical studies, administrative permits, third-party independent construction control, and post-delivery follow-up. Available in Indre-et-Loire (37) and Maine-et-Loire (49) departments of France, with each project delivered under a CCMI fixed-price contract.
• Stylis House Model Contemporary-style house model with 234 m² habitable surface, featuring an upstairs layout with mezzanine, 3 bedrooms, and terrace. Offered as a configurable starting design for individual home buyers in the Indre-et-Loire and Maine-et-Loire regions who want a large contemporary custom house.
• Affiny House Model Traditional single-story house model with 100 m² habitable surface, 3 bedrooms, a bathroom with bathtub and shower, and optional convertible attic space. Targeted at individual home buyers seeking a compact, traditional custom home, including retirees planning aging-in-place.
• Nighty House Model Contemporary house model with 185 m² habitable surface and upstairs layout, featuring a 46.9 m² living area, 4 bedrooms, and terrace. Targeted at individual home buyers seeking a mid-to-large contemporary custom family house.
• Felio House Model Single-story (plain-pied) house model with 120 m² habitable surface designed for ground-floor living. Targeted at individual home buyers, including retirees and those planning to age in place, who want a spacious accessible single-floor custom home.
• Tracytio House Model Traditional house model with 95 m² habitable surface and upstairs layout, featuring 4 bedrooms, a 42.9 m² living area, and a garage. Targeted at individual home buyers seeking a compact, traditional family-oriented custom house.
• Terrain Search Assistance Support service helping clients find and evaluate constructible plots in the Centre-Val de Loire (37) and Pays de la Loire (49) regions prior to construction. Targeted at individual home buyers who do not yet own land.

Quantifiable outcome

• Over 3,000 houses built since 1989, with 100% at contracted price and 100% on-time delivery or indemnified
• +3 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Six partnerships are on record, tiered core.

• SOCOTECcoreStrategic or Co-development Partner · 1 January 1994SOCOTEC has been Pierre et Terre's quality partner since 1994. Their first steps in quality process and construction risk prevention were made through SOCOTEC's ASQ (Association Socotec Calidad) program. SOCOTEC continues to provide third-party quality assurance and risk management for construction projects.
• CERQUALcoreTechnology or IntegrationCERQUAL is the reference organization for certification, labeling, and promotion of overall quality, environmental quality, and energy performance for the construction and renovation of individual houses in France. Pierre et Terre holds multiple CERQUAL certifications (NF Maison Individuelle, NF HABITAT, NF HABITAT HQE).
• NRGYScoreTechnology or IntegrationNRGYS is the engineering bureau that conducts all thermal studies for Pierre et Terre's houses to optimize energy performance and building intelligence. They provide tools and advice for RE 2020 compliance and energy efficiency.
• UBAT CONTROLEcoreTechnology or IntegrationUBAT CONTROLE is Pierre et Terre's dedicated partner for air tightness testing of all houses. They prepare and validate the air permeability certification for houses built, guaranteeing a performance of 0.5 m3/h/m2.
• ARMASOLcoreTechnology or IntegrationARMASOL is a national reference for soil studies (études géotechniques). Their expertise in foundation systems for small buildings allows them to conduct rigorous geotechnical studies for each Pierre et Terre construction project.
• LCA-FFB (Les Constructeurs et Aménageurs de la Fédération Française du Bâtiment)coreStrategic or Co-development PartnerLCA-FFB brings together three professions under one banner: individual house builders, property developers, and land developers. Pierre et Terre is a member of this federation, which provides industry representation, standards-setting, and collective credibility.

Scale indicators6 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• Hexaôm (Maisons France Confort): France's largest individual home builder (formerly Maisons France Confort), listed on Euronext, operating a national CCMI-based custom home model. Most direct comparable in product offering and CCMI contract structure, though at vastly larger scale.
• Maisons Stéphane Berger: Regional French custom home builder offering tailored individual houses under the CCMI contract framework. Comparable in scale and operating model to Pierre et Terre, with a strong local/regional agency presence.
• Maison Castor: Independent French custom home builder with multi-department agency coverage and CCMI contract-based individual house construction. Comparable scale and operating philosophy.
• Maisons Pierre: Major French custom home builder with national agency footprint using the CCMI framework. Closely comparable business model, target customer (individual home buyers), and custom construction process.
• Babeau Seguin: Independent French custom home builder with multi-regional agency network, focused on individual single-family construction under CCMI contracts. Comparable mid-sized independent competitor with similar custom-design emphasis.

Regional players

• Demeures Côte d'Atlantique: Custom home builder focused on western France (Pays de la Loire, Charente-Maritime). Comparable business model and target customer, but operates in overlapping yet distinct regional geography.
• LCC - Les Constructions du Centre: Regional custom home builder operating in the Centre-Val de Loire region (overlapping with Pierre et Terre's department 37 footprint). Direct regional competitor with similar custom single-family focus.

Others

• SOCOTEC: Pierre et Terre's quality-control partner since 1994, providing third-party construction oversight. Ecosystem participant — illustrates the certification/quality infrastructure supporting French custom homebuilders.
• CERQUAL (Certita): Reference certification body for NF Maison Individuelle and NF HABITAT standards. Ecosystem enabler — the certifications Pierre et Terre holds are issued by this organization, shaping the competitive regulatory framework.

Broad incumbents

• Mikit (Geoxia): Large French franchised home builder offering affordable custom and semi-custom individual houses. Comparable end-customer and product category, but positioned at lower price points with a franchise-driven national model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/pierre.et.terre
• Instagraminstagram.com/pierreetterre
• Pinterestpinterest.fr/pierreetterre

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries2 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 Stone and Earth