Diagonale

What Diagonale does

Diagonale is a privately held French real estate developer (promoteur immobilier) incorporated in Lyon as a Société Anonyme with €200,000 share capital, operating a new-build residential property business across three principal French regions — Lyon, Paris, and the Arc Lémanique (Haute-Savoie/Geneva corridor) — and a wholly-owned subsidiary in Spain (Diagonale Espagne). The company develops, markets, and sells residential units ranging from studios (T1) to five-bedroom (T5) configurations, with project sizes spanning approximately 30 to 400 units per program and unit prices ranging from roughly €92,000 for an entry-level T1 to €870,000 for premium T5s in alpine locations. Distinguishing functional elements include the proprietary 'Home Concept' matériauthèque showroom, an online purchase simulation tool, NF Habitat / RE2020 / RT 2012 / Positive Energie certifications on multiple programs, and selective use of reduced VAT (5.5%) and PTZ-eligible structuring to widen the addressable buyer pool.

The go-to-market motion is sales-led and direct: physical on-site bureaux de vente at each development, three regional offices (Lyon HQ, Paris/Levallois-Perret, Arc Lémanique/Epagny Metz-Tessy), and a multi-channel digital presence (website, Instagram, LinkedIn, Facebook, YouTube). The company addresses four primary customer segments — first-time buyers (primo-accédants) via PTZ-eligible programs, individual property investors, cross-border workers (frontaliers) in the Geneva commuter belt, and families seeking larger units — with named partnerships with architectural firms (Hors Cadre, Lipstick + Xanadu, Daragon Cheysson) and a virtual-tour vendor (Kreaction). Diagonale is led by Franck Ponsonnet (Directeur Général) and operates with 11-50 employees; no revenue, funding, or ownership figures are disclosed.

Name

Diagonale

Legal name

DIAGONALE SA

Website

https://diagonale.fr

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

101–250 employees

Short description

Diagonale is a French residential real estate developer (promoteur immobilier) headquartered in Lyon, designing and selling new-build apartments across Lyon, Paris, and the Arc Lémanique (Haute-Savoie) regions, plus a Spanish subsidiary. It serves first-time buyers, investors, cross-border workers, and families.

Ownership category

akta.pro rank

Headquarters

HQ city

Lyon

HQ country

France

HQ region

Europe

Offices5 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales

Revenue model

1. New Real Estate Development Sales: Diagonale generates revenue through the development and sale of new residential properties, including apartments ranging from T1 studios to T5 units, as well as individual houses. The company operates across three main regions: Lyon, Paris, and Arc Lémanique (Haute-Savoie/Geneva area).

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Diagonale is a French residential real estate developer (promoteur immobilier) that conceives, builds, and sells new-build housing units — primarily apartments from studios (T1) to large family units (T5), along with individual houses — across three regional markets: Lyon, Paris, and the Arc Lémanique (Haute-Savoie/Geneva area). The company also operates a Spanish subsidiary (Diagonale Espagne). Each named program (e.g., ALPHA, ALIZÉ, PLEIN CENTRE, AMBRE, LES CHALETS DE JAÏSINIA, VILLA SACHA) is a distinct residential development marketed to individual buyers and investors, with supporting services such as a Home Concept showroom (matériauthèque) and an online purchase simulation tool.

Product overview

Diagonale is a French real estate developer (promoteur immobilier) specializing in new residential properties across three main regions: Lyon, Paris, and the Arc Lémanique (Haute-Savoie). The company offers a diverse portfolio of new-build apartments ranging from compact studios to T5 configurations, with programs varying from 2-4 unit intimate residences to large-scale developments of up to 400 units. The product portfolio includes standard residential programs (such as ALPHA, ALIZÉ, PLEIN CENTRE, AMBRE, LES CHALETS DE JAŸSINIA, VILLA SACHA), exceptional apartment offerings (DYADE rooftop apartments), and programs with specific certifications (NF Habitat, RE2020, RT 2012). Diagonale also provides complementary services including HOME CONCEPT (a showroom with matériauthèque for material visualization), online purchase simulation tools, referral programs (devenir parrain), and recruitment services. The company operates offices in Lyon, Paris, and Epagny Metz-Tessy (Arc Lémanique).

Differentiator

Problem solved

Functional benefit

Products and services

• ALPHA Residential program in Ambérieu-en-Bugey comprising approximately 80 apartments (T1-T4) with commercial units on ground floor. Features landscaped courtyard, private gardens, balconies, loggias and panoramic terraces. RT 2012 certified with TVA 5.5% and PTZ eligibility.
• ALIZÉ Contemporary residential program in Vénissieux featuring 24 apartments (T2-T4) designed by Lipstick + Xanadu Architecture. RE2020 compliant with wood-aluminum joinery, landscaped gardens, and underfloor parking. Located near square Vaillant-Couturier.
• PLEIN CENTRE Accessible residential program in Vénissieux offering 48 apartments (T1-T4) with RE2020 compliance, TVA 5.5% reduced rate, and PTZ eligibility. Features elegant architecture with generous outdoor spaces. First deliveries end of 2027.
• AMBRE Contemporary residential program in Saint-Genis-Pouilly with 20 apartments (T2-T5). Features green roofs, photovoltaic panels, and generous outdoor spaces. RE2020 compliant, located near Geneva and CERN.
• LES CHALETS DE JAÏSINIA Intimate residence of 16 apartments (T2-T5) in Samoëns inspired by the Alpine botanical garden. Contemporary chalet architecture with South/South-West exposure and panoramic views. Delivery Q2 2028.
• VILLA SACHA Residential program in Perrignier offering 15 accession apartments and 4 Bail Réel Solidaire units (T2-T4). RE2020 compliant with outdoor terraces and gardens. Located near Léman Express station for Geneva commute.
• L'ÉCLAT Residential program in Arcueil (Paris region) featuring 37-49 rue de la Division du Général Leclerc. Offers notary fees paid promotion and second parking space included for T4 units.
• VILLA 32 Residential program in Montreuil (Paris region) at 30 rue Charles Delavacquerie. Last opportunity for 3-room apartments with notary fees paid offer.
• LES COTEAUX DE LA DHUYS Contemporary residential program in Dampmart (Paris region) with comfortable, bright apartments T2-T4. May launch offer and 1000€ per room discount.
• APOSTROPHE Residential program in Puteaux (Paris La Défense area) at 31-35 rue Charles Lorilleux. T4 apartments available with notary fees paid. Works in progress.
• ALBA Intimate 2-floor residence of 4 exceptional apartments (T2-T5) in Megève. Mountain setting in the Arc Lémanique region.
• IRIS Residential program in Villeurbanne at 328 Cours Émile Zola. TVA 5.5% eligible, located near the Gratte-ciel district.
• EDENWEISS Intimate residence in Les Gets (Haute-Savoie) with authentic Haut-Savoyard spirit. NF Habitat certified.
• CARAT Residential program in Francheville near Lyon. Works started. Located at 6 Impasse des Grandes Terres.
• DYADE Exceptional rooftop apartment (T4, 118 m²) in Francheville. Features rare exterior volumes in an intimate, calm and tree-filled residence.
• LES ROCHES Residential program in Viuz-en-Sallaz featuring T2-T5 apartments with generous surfaces. NF Habitat and RE2020 certified. Works in progress, delivery Q4 2027.
• LES HAUTS DE LA BARBIERE Program in Valserhône comprising 26 apartments and 19 individual houses. Features Positive Energie (Grenelle) certification, contemporary architecture integrated into landscape.
• CŒUR Residential program in Scionzier with 30 apartments (T1-T4). RE2020 compliant, NF Habitat certified. Ground floor includes commercial space and daycare. 70 parking spaces available.
• DELTA Intimate residence in Scionzier with 22 apartments (T2-T4). Features wood cladding, landscaped setting with mountain views. Works in progress.
• Le 1907 Premium residence in Praz-sur-Arly comprising 22 apartments (studio-T5) including two new constructions and a renovated chalet. NF Habitat and RT 2012 certified with high-end finishes, ski room, and cathedral ceilings.
• HOME CONCEPT Showroom service featuring a matériauthèque (material library) where prospective buyers can visualize materials such as tiles, faïence, parquet, and flooring in realistic settings including office, bathroom, and children's bedroom configurations.
• Online purchase simulation tool Online purchase simulation tool allowing prospective buyers to calculate and plan their property acquisition. Accessible at https://diagonale.fr/simulation-achat-appartement/.

Quantifiable outcome

• RT 2012 and RE2020 compliant construction ensures energy efficiency and reduced operating costs for residents
• +1 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Four partnerships are on record, tiered minor.

• Hors Cadre ArchitectureminorStrategic or Co-development PartnerArchitectural firm that designed the ALPHA program in Ambérieu-en-Bugey, creating a contemporary residence with modern, elegant lines respecting the existing urban fabric.
• Lipstick + Xanadu ArchitectureminorStrategic or Co-development PartnerArchitecture firm that designed the ALIZÉ residence in Vénissieux, creating an elegant and rhythmic architecture reflecting the renewal of the Moulin à Vent district.
• Daragon Cheysson ArchitectesminorStrategic or Co-development PartnerArchitectural firm referenced in property documentation (floor plans for VILLA SACHA program), indicating collaborative design relationships.
• Léman ExpressminorOthersCross-border rail network connecting Geneva and surrounding French areas (Cluses, Annemasse, etc.), referenced as a key accessibility feature for Arc Lémanique properties.

Scale indicators2 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Nexity: France's largest residential real estate developer (promoteur immobilier) and a publicly listed national incumbent. Directly comparable to Diagonale as a new-build residential developer, but operating at materially greater scale across all major French metropolitan areas including Paris, Lyon, and the wider Rhône-Alpes region.
• Altarea (Altarea Cogedim): Listed French real estate group combining residential development (Cogedim) with retail and office real estate. Comparable to Diagonale as a multi-region residential developer, with significant presence in Paris, Lyon, and Geneva border regions — directly overlapping Diagonale's Arc Lémanique footprint.
• Bouygues Immobilier: Subsidiary of Bouygues Group and one of France's leading residential property developers. Comparable to Diagonale across new-build apartments, multi-regional presence (including Lyon and Paris), and use of NF Habitat certifications; operates at national scale with substantially larger resources.
• Eiffage Immobilier: Real estate development arm of Eiffage Group, one of France's largest construction conglomerates. Develops new residential programs across major French cities with a comparable target buyer profile to Diagonale; benefits from integrated construction capabilities.
• Kaufman & Broad: Listed French residential developer (formerly Prizma) developing new-build apartments and houses across major French metros. Comparable to Diagonale's multi-regional, multi-product-type strategy; significantly larger with national brand recognition.
• Vinci Immobilier: Real estate development subsidiary of Vinci Group, one of France's largest construction and concessions companies. Comparable to Diagonale in developing new-build residential programs across major French metros, with national scale and brand strength.

Direct peers

• Edelis (Groupe Edouard Denis): Mid-sized French residential developer (promoteur immobilier) operating across multiple regions. Direct comparable to Diagonale in scale, product mix (T1-T5 new-build apartments), and reliance on PTZ/TVA reduced-rate programs for first-time buyer absorption.
• Pichet Group: Privately held French family-owned real estate developer comparable in size and structure to Diagonale. Develops new-build residential programs across multiple French regions, including Rhône-Alpes/Auvergne and Paris, with similar product mix (apartments, houses) and target buyer segments.
• Promogim: Independent French residential real estate developer founded in the 1960s. Similar in scale and operating model to Diagonale, with multi-regional new-build apartment programs and a comparable mix of metropolitan and peri-urban locations.
• Marignan (part of Pierres & Territoires): French regional residential developer active in Paris, Lyon, and southeastern France markets. Closely comparable to Diagonale in geographic footprint, target buyer segments (first-time buyers and investors), and project size range (20-200+ units).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@diagonaleimmobilier/featured
• Facebookfacebook.com/DiagonaleImmobilier
• LinkedInlinkedin.com/company/diagonale
• Instagraminstagram.com/diagonale.immobilier
• Xx.com/diagonaleimmo

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

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 Diagonale