2026/06/30
Jun Sung Park
NEWS
2026/01/26
Jun Sung Park
With over 30 years of experience in architecture and interior design, RED believes that a penthouse is far more than just a place to live. It is a statement of lifestyle, individuality, and status. A successful penthouse interior design project requires a seamless balance of architectural thinking, refined aesthetics, and a high level of customization tailored to each homeowner.
In this guide, RED invites you to explore every aspect of penthouse living, from the definition and key characteristics of a penthouse, to space-by-space design approaches, the most influential design styles for 2026, and practical insights that help you optimize your budget while maximizing long-term value and functionality.
As cities become increasingly dense and land grows more limited, the penthouse has emerged as the ultimate expression of elevated urban living. More than simply the top-floor residence, a penthouse represents a lifestyle removed from the noise and congestion below, where homeowners enjoy privacy, tranquility, and a true sense of spatial ownership.

At RED, a penthouse is seen as the ideal canvas for highly personalized penthouse interior design. Every detail is thoughtfully considered, existing not for decoration alone but to enhance the homeowner’s daily experience, far beyond fleeting trends or purely visual appeal.
The true value of a penthouse does not lie solely in its size or height, but in a unique combination of qualities that are difficult to replicate. Expansive, unobstructed views create a constant sense of openness and a strong connection to the surrounding cityscape. In penthouse interior design, natural light and panoramic views become integral design elements rather than mere features.

Equally important are the architectural advantages: high ceilings, flexible structural systems, and minimal columns. These conditions give architects and interior designers the freedom to explore double-height spaces, open layouts, and experiential zones such as private lounges, libraries, or even in-home spa areas.
One often-overlooked yet essential aspect of penthouse interior design is emotional well-being. Living in a penthouse is not just about owning a beautiful space, it’s about how that space restores and energizes you each day. From morning sunlight filtering through floor-to-ceiling windows to moments of quiet relaxation in a spa-like bathroom with open views, every experience contributes to a sense of renewal.

RED believes that when living spaces are designed with intention, a penthouse becomes a place where balance is restored, between work and life, movement and stillness. This philosophy is why RED’s penthouse projects consistently prioritize natural light, tactile and environmentally friendly materials, and layouts that reduce stress while supporting both physical and mental well-being.
A penthouse offers what every interior designer seeks: creative freedom with purpose. Free from the limitations of compact floor plans or rigid structural constraints, penthouse interior design allows full exploration of verticality, spatial depth, and rich material contrasts.

At RED, penthouses are never designed as symbols of excess or display. Instead, they are crafted as living narratives, spaces that reflect the homeowner’s story.
Identifying the right type of penthouse from the very beginning is a crucial step. Each typology leads to a different approach in spatial planning, stylistic direction, and overall penthouse interior design strategy.
Based on RED’s hands-on project experience, the following are the two most common penthouse types encountered in practice.
A duplex penthouse spans two levels connected by an internal staircase, making it an ideal choice for homeowners who appreciate spatial depth, architectural drama, and an elevated, art-driven living experience.

From a design perspective, duplex layouts allow for highly valuable features such as double-height living rooms, curated art galleries, and sculptural lighting elements that visually connect both floors.
However, to fully unlock this potential, duplex penthouse interior design must be carefully planned, particularly in terms of functionality, natural light distribution, and circulation flow.
Design guidelines and practical considerations:
A single-level penthouse features all living spaces on one continuous floor, offering ease of movement and straightforward functional control. This layout suits homeowners who value clarity, minimalism, and everyday convenience.

In single-level penthouse interior design, the main challenge is not square footage, but spatial organization. Without careful planning, the space can feel overly stretched or fragmented. Thoughtful zoning through lighting, material transitions, and subtle changes in floor height becomes essential.
Design guidelines and practical considerations:
From RED’s perspective, there is no “better” penthouse, only one that better aligns with the homeowner’s lifestyle. Before beginning the design process, consider the following questions:
Clear answers to these considerations will help your penthouse interior design journey unfold more smoothly, saving costs, streamlining decisions, and delivering long-term value that truly supports the way you live.
At RED, space planning is not simply about arranging functional rooms, it is about creating a cohesive rhythm of daily life throughout the entire penthouse. Every zone is positioned with intention, given a clear role, and seamlessly connected to the overall spatial narrative.
In penthouse interior design, shared living spaces form the backbone of the home. These areas most clearly express the homeowner’s lifestyle, aesthetic sensibility, and approach to spatial organization.
RED designs these spaces with an open yet controlled mindset, ensuring a sense of openness while maintaining comfort, functionality, and long-term usability.
The penthouse living room is more than a place to entertain guests; it sets the first impression upon entering the home. With generous ceiling heights, expansive floor plans, and panoramic views, this is where the essence of luxury penthouse interior design is most strongly expressed.

RED typically keeps the layout visually restrained while investing heavily in materials, lighting, and spatial proportions. The goal is understated sophistication, refined and timeless rather than overtly showy.

Practical design guidelines:
In contemporary penthouse interior design, the kitchen is no longer hidden away, it has become an integral part of the shared living space. As a result, it must strike a balance between visual refinement, practical performance, and everyday order.

RED focuses on concealing technical elements and integrating smart storage solutions so the kitchen remains clean and composed when viewed from the living area.

Practical design guidelines:
The kitchen island is a feature RED frequently incorporates in penthouse interior design, as it serves both functional and spatial purposes. It acts as a connector, a work surface, and a subtle divider between the kitchen and adjacent living or dining areas.

This approach preserves openness while providing clear zoning, an essential consideration in penthouse layouts.
Practical design guidelines:
In most penthouses, the dining area sits between the kitchen and living room, forming a continuous axis of shared activity. RED treats this space as a transitional zone, intimate enough for family meals, yet refined enough for hosting guests.

Within penthouse interior design, the dining area should have its own character while remaining visually connected to the surrounding spaces.
Practical design guidelines:
Spaces such as entry foyers, corridors, and walkways are often overlooked, but at RED, they are considered essential to the overall experience of penthouse interior design. These transitional zones ensure spatial continuity and elevate the sense of movement throughout the home.

Practical design guidelines:
In penthouse interior design, private spaces are where homeowners truly reconnect with themselves.
At RED, these areas receive the most delicate level of attention, as even a single misaligned detail can affect sleep quality, focus, and long-term emotional balance.
A master bedroom in a penthouse is not merely a place to sleep; it is a space for physical recovery and mental restoration.
RED designs each master bedroom based on the homeowner’s daily habits, lifestyle rhythm, and personal aesthetic, rather than relying on a fixed design formula.

Practical design guidelines:
In a penthouse, secondary bedrooms often serve multiple purposes: children’s rooms, guest suites, or short-stay sleeping areas. The design must therefore remain adaptable while still offering comfort and privacy.

Practical design guidelines:
For many penthouse homeowners, a dedicated workspace is essential. RED approaches home office design with simplicity, acoustic control, and abundant natural light, creating an environment that supports deep focus and creativity.

Practical design guidelines:
In high-end penthouse interior design, a walk-in wardrobe goes beyond storage, it becomes an experiential space that reflects the homeowner’s taste and refinement.

RED pays close attention to lighting, layout, and materials so the space feels both practical and reminiscent of a private boutique.
Practical design guidelines:
Private bathrooms are designed by RED as intimate spa-like retreats. These spaces allow homeowners to unwind, release stress, and recharge after demanding days.

Practical design guidelines:
In penthouse interior design, leisure spaces are what transform a high-end residence into a truly elevated living experience. These are not optional or secondary areas, they are essential environments where homeowners recharge, slow down, and express their individuality in the most personal way.
At RED, leisure spaces are viewed as the reward within the home, a place where daily pressures fade and emotional well-being is nurtured over time.
A penthouse bathroom goes far beyond basic functionality. RED designs these spaces as private, in-home spas where lighting, materials, and spatial flow work together to create deep comfort and relaxation.
Practical design guidelines:
One of the greatest advantages of penthouse living is access to expansive balconies or elevated gardens. These areas allow RED to introduce greenery into the urban environment, creating a vital balance between architecture and nature.

Practical design guidelines:
The lounge area in a penthouse is intended for quiet enjoyment—reading, listening to music, or sharing unhurried conversations. RED designs these zones as intentionally “slow” spaces, subtly separated from daily activity while remaining connected to the overall layout.
Practical design guidelines:
A compact home bar is a popular feature in contemporary penthouse interior design, especially for homeowners who enjoy hosting intimate gatherings or unwinding in the evening without leaving home.

Practical design guidelines:
Depending on the homeowner’s lifestyle, leisure areas can evolve into specialized spaces such as a private cinema, music room, yoga studio, or home gym. These rooms most clearly express the personality and lifestyle of the penthouse owner.

Practical design guidelines:
By 2026, penthouse interior design is no longer defined solely by beauty or luxury. Instead, it is increasingly driven by personalization—reflecting the homeowner’s character, daily rhythm, and deeper emotional values.
Each of the styles below represents a distinct way of living. To fully realize the potential of a penthouse, these styles must be applied with a clear strategy rather than treated as surface-level aesthetics.
Modern style design reflects the fast-paced, efficient nature of city life, making it a natural fit for penthouse interior design in major urban centers. This style prioritizes functionality, open layouts, and flexibility, allowing the space to evolve as the homeowner’s needs change over time.

In a penthouse setting, modern design enhances the sense of openness through clean spatial organization, minimal ornamentation, and generous use of natural light.
Design guidelines:
Luxury in penthouse interior design is not about excess or visible opulence, but about mastering proportion, atmosphere, and emotional impact. This style celebrates precision, from subtle detailing and material finishes to lighting and furniture placement. When executed well, luxury feels effortless and understated, yet unmistakably premium.

RED approaches luxury through restrained forms, superior craftsmanship, and seamless transitions between spaces, ensuring the penthouse remains both prestigious and practical for everyday living.
Design guidelines:
Minimalism in penthouse interior design is not simply about reducing furniture; it represents a deliberate and mindful approach to living. By removing visual noise, this style creates calm, clarity, and space for focus, allowing homeowners to engage more deeply with what truly matters.

Minimalist penthouses often feel light, open, and timeless, especially when paired with strong views and abundant natural daylight.
Design guidelines:
Classic penthouse interior design conveys elegance, grandeur, and a strong sense of status. This style demands a high level of design expertise, as even minor miscalculations in proportion or material selection can make the space feel overly heavy or outdated.

When executed correctly, classic design delivers a majestic atmosphere with enduring aesthetic value.
Design guidelines:
Neoclassical style is an ideal choice for homeowners who appreciate classical beauty but prefer a lighter, more contemporary interpretation. This style delivers a sense of elegance and balance, making it especially well suited to large penthouses with generous ceiling heights.

The success of neoclassical penthouse interior design lies in refined proportions, subtle molding details, thoughtfully selected furnishings, and a soft color palette that feels sophisticated without appearing dated.
Design guidelines:
Contemporary design reflects the spirit of the present moment, allowing penthouse interior design to remain fresh without requiring major structural changes.

This style prioritizes experience, usability, and flexibility, making it ideal for homeowners who enjoy evolution rather than permanence.
Design guidelines:
Scandinavian style introduces a sense of calm and comfort, encouraging slower, more mindful living. In penthouse interior design, this style softens large spaces and creates a welcoming atmosphere well suited to family life.

Design guidelines:
Indochine design carries deep cultural character, blending Asian sensibilities with French colonial influences. When applied to penthouse interior design, this style must be carefully refined to suit contemporary lifestyles and avoid an overly nostalgic feel.

Thiết kế nội thất penthouse indochine
RED interprets Indochine through a modern lens, preserving its distinctive materials and spirit while simplifying patterns and forms, resulting in spaces that feel both culturally rich and effortlessly livable.
Design guidelines:
Japandi design blends Japanese minimalism with Scandinavian warmth, creating serene, balanced environments ideal for resort-inspired penthouse living. This style emphasizes stillness, harmony, and emotional clarity.

Design guidelines:
Penthouse interior design is a multidimensional challenge, balancing aesthetics, functionality, technical requirements, and the emotional quality of living. With expansive floor areas, high ceilings, and significant investment levels, even a single poorly considered decision can result in wasted space or an incomplete living experience.
Below are the core principles RED prioritizes in every penthouse project.
In large, multifunctional spaces, clear and logical zoning allows a penthouse to operate smoothly and comfortably on a daily basis.
Effective penthouse interior design clearly distinguishes shared living areas from private zones, while maintaining a cohesive spatial flow throughout the home.

Key guidelines and practical tips:
Example: A living room and kitchen remain visually connected, yet subtly separated through a kitchen island and dedicated pendant lighting.
The chosen design style serves as the guiding framework for both design and construction. Changing direction mid-project often leads to increased costs and visual inconsistency.
In penthouse interior design, style selection should be driven by real-life habits and long-term comfort, not trends alone.

Key guidelines and practical tips:
Example: Homeowners who prefer simplicity and host infrequently may find Minimalism or Japandi more suitable than a formal Luxury style.
Penthouse projects typically involve substantial investment, making financial planning essential for cost control and peace of mind.

Key guidelines and practical tips:
Example: Invest in quality flooring and built-in cabinetry, while keeping decorative elements more restrained.
Light and views are two of a penthouse’s greatest privileges. Successful penthouse interior design fully leverages these elements to enhance both everyday comfort and visual appeal.

Key guidelines and practical tips:
Example: Arrange the living room sofa to face the city skyline, avoiding tall cabinetry that blocks the view.
Penthouses often involve complex technical systems such as centralized air conditioning, smart lighting, and full smart-home integration. When these systems are not planned from the outset, they can easily disrupt the overall aesthetic. For this reason, penthouse interior design must be developed hand in hand with technical planning.

Key guidelines and practical tips:
Example: Concealed ceiling-mounted air conditioning paired with linear air slots creates a cleaner, more refined look than wall-mounted units.
Large-scale penthouse interiors demand materials that feel proportionate and cohesive. Using small-format finishes or low-quality materials can significantly diminish the perceived value of the space.
In penthouse interior design, materials must be visually impressive, durable, and practical to maintain.

Key guidelines and practical tips:
Example: Large-format marble wall cladding in the bathroom enhances both elegance and ease of maintenance.
With expansive floor areas, homeowners may feel tempted to fill every corner with furniture or decorative elements. However, excess often undermines sophistication. Successful penthouse interior design requires restraint to create emotional balance and a sense of calm.

Key guidelines and practical tips:
Example: A single large-scale artwork can be far more impactful than multiple smaller pieces competing for attention.
Penthouse projects often involve specialized features such as layout modifications, light structural adjustments, rooftop gardens, or private pools. As a result, legal compliance and construction quality control are critical components of penthouse interior design.

Key guidelines and practical tips:
Example: Rooftop swimming pools require precise load calculations and advanced waterproofing solutions.
RED Interior Design & Architecture is a Korean-owned architecture and interior design firm operating in Vietnam. We don’t simply create beautiful spaces, we craft living experiences that are human-centered, enduring, and deeply inspiring.
If you are looking for a penthouse interior design partner who offers:
Contact RED’s design experts today to begin your penthouse journey.
Phone number:
(+84) 907560344 [KOR-VIET-ENG]