For nearly twenty years, Castellanos Design has been designing and manufacturing custom-made interiors in the Hautes-Pyrénées region. Under the leadership of Delphine Dupuy, the company has embarked on a major strategic shift: no longer simply delivering furniture, but also supporting its use over time.

Based in Andrest, near Tarbes, Castellanos Design has established itself as a leading player in high-quality interior design, serving both individuals and professionals. Its service area has gradually expanded and now covers the Hautes-Pyrénées, Pyrénées-Atlantiques, Landes, Gers, and southern Haute-Garonne departments. This deliberate geographical development serves a clear promise: to design spaces that can evolve without needing to be replaced.

A Takeover in Continuity, a Deliberate Evolution

“We took over the company ten years ago,” recalls Delphine Dupuy, 36. When the original founders retired, two employees acquired the business without changing its name: a strong strategic choice, designed to preserve local recognition and the existing trust with clients. In 2024, Delphine Dupuy bought out her partner’s shares and became the sole owner. This turning point reflects a consistent approach: to develop Castellanos Design without ever abandoning its artisanal roots or its close relationship with end users.

From Apprenticeship to Management

Trained in upholstery, interior design, and then interior architecture, Delphine Dupuy joined Castellanos as an apprentice in 2012. “I got there almost by chance, after discovering the company in an article.” Very early on, she developed a comprehensive vision of interior design, integrating technical aspects, aesthetics, and functionality. At just 26 years old, she participated in the company's takeover and gradually introduced a new way of designing projects: thinking about spaces before furniture, uses before forms, and incorporating each project into a long-term strategy.

Clients Seeking Precision and Sustainability

Long known as a kitchen specialist, the company has gradually expanded its scope to include comprehensive interior design: kitchens, libraries, dressing rooms, offices, and complete interior renovations. Today, its clientele is primarily composed of senior executives over 40, living in their primary residence, at a pivotal point in their lives. "They're not just looking for a beautiful object, but a space that continues to simplify their lives, now and in the future." One project particularly illustrates this philosophy: near Argelès-Gazost, a kitchen was completely redesigned while preserving a blue granite countertop, a rare stone with strong sentimental value. The challenge wasn't to replace the existing elements, but to reorganize, optimize, and extend them. This approach prioritizes meaning, the memory of the space, and lasting functionality.

Custom-made kitchens without outsourcing

At Castellanos Design, everything is designed, manufactured, and installed in-house. The company has its own workshop and controls the entire value chain, from design to final installation. Their custom kitchens are positioned in the mid- to high-end segment, with a deliberately lower price difference—around €1,000—compared to major industrial brands, while offering local manufacturing, complete personalization, and a high degree of design freedom. Materials are chosen according to intended use and budget: laminate, solid wood, and finishes ranging from understated to more daring. The choice is never purely aesthetic; it is always reasoned, functional, and sustainable.

50% of business dedicated to professionals

Today, Castellanos Design's business is split equally between individuals and professionals. The company works with pharmacies, medical practices, jewelry stores, hotels, local shops, cultural venues, local authorities, and franchises throughout its geographic area.

Among its flagship projects is the design of the Café du Parvis in Ibos, located in a former ticket office space—a red cube—at the heart of a cultural center. The challenge was to integrate a café designed as a welcoming space, capable of accommodating the public during intermissions and between performances. The layout was designed to optimize customer flow, speed of service, and comfort, while seamlessly integrating with the existing architecture and the cultural identity of the venue.

Another significant achievement: in the village of Seich, Castellanos Design conceived and built a multifunctional space combining a bar, counter, library, and grocery store. Designed as a true living space, the project had to accommodate multiple uses within a limited area. The counter was specially designed to adapt to these different functions: preparing drinks, a checkout area for the grocery store, a library corner, and a lunch area. The layout incorporates a sink, a checkout area, a refrigerator, a dishwasher, and a coffee grounds bin, optimizing every square meter to offer a seamless and welcoming experience.

Custom truck conversions were also carried out through a partnership with Castaing Automobiles, a garage in Pujo.

For each professional project, the method remains the same: analyze actual usage patterns, understand business constraints, anticipate future developments, and design functional, sustainable spaces that are consistent with the identity of the location.

A structured and people-focused company

In ten years, Castellanos Design has grown from four to eight employees. Turnover has doubled, reaching €700,000 in 2025, with a stated objective of reaching €1 million, all while maintaining a family-run business model and controlled growth. During this decade, several key milestones have marked the company: the transition to a four-day work week, the opening in 2017 and subsequent closure in 2022 of a store in Auch, the purchase of a building and the relocation of operations to a 1,200 m² site in Andrest, the expansion of the design office with the addition of a second position and a dedicated assistant, and, in 2024, the recruitment of a project manager specializing in interior design to develop the Pyrénées-Atlantiques region and strengthen project management. In addition, there is the deployment of a custom-designed ERP system, a redesign of the visual identity, and a new unifying slogan: "The workshop for all your ideas. Designed for you. Made in-house."

Visibility, Recommendations, and Word-of-Mouth

Castellanos Design's communication strategy is primarily aimed at a discerning clientele. "Senior executives don't use Facebook, but rather the website, Instagram, and LinkedIn for businesses," explains Delphine Dupuy. But beyond these platforms, word-of-mouth remains the main driver of growth. Take, for example, the client who, after having her kitchen renovated, showed it to her friends… leading to several new projects. This positive word-of-mouth approach confirms the strength of the client relationship and the perceived quality of the work.

The Functional Economy as a Backbone

At Castellanos Design, sustainability goes beyond materials. The cabinets are designed for a forty-year lifespan, with Blum hardware guaranteed by the manufacturer. Above all, the layouts are designed to evolve. "We're here for twenty-five years if your needs change": this phrase sums up the company's positioning. Where the traditional model focuses value on the delivered product, Castellanos Design shifts that value towards its use over time. The layout becomes a support for life, capable of accompanying personal or professional transformations without being entirely replaced.

Spaces that last because they evolve

Castellanos Design doesn't just sell custom-made furniture. The company designs spaces that can accompany the lives of their users, with a focus on continuity, simplicity, and meaning. A demanding, handcrafted, and resolutely contemporary approach, where layout is no longer an end in itself, but a long-term commitment.

Photo credits : Castellanos and Jérôme Narbonne

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