AtkinsRealis — New Murabba Masterplanner and Mukaab Architect

AtkinsRealis: Masterplanner of the World’s Largest Modern Downtown

AtkinsRealis won the international architecture and masterplanning competition for New Murabba and The Mukaab in 2022, led by Regional Creative Design Director Edward McIntosh. The firm was formally appointed in December 2023 to masterplan what NMDC calls the world’s largest modern downtown. The competition victory positioned AtkinsRealis at the center of one of the most ambitious urban development projects in history — a 19-square-kilometer district with 25 million square meters of total floor area, $50 billion in projected investment, and a target population of 420,000 residents.

AtkinsRealis’s scope encompasses the full district layout, The Mukaab’s 400-meter cube design inspired by modern Najdi architectural style, and integration of the 45,000-seat stadium, residential neighborhoods, commercial precincts, and cultural venues. The breadth of this scope places AtkinsRealis in a design coordination role that extends far beyond conventional architectural practice, requiring integration of urban planning, structural engineering, facade technology, sustainability systems, and smart city infrastructure.

Design Philosophy: Modern Najdi Architecture

The Mukaab’s facade design features overlapping golden triangular panels that reinterpret Najdi architectural tradition — the indigenous building style of central Saudi Arabia characterized by geometric patterns, triangular battlements, and climate-responsive design. The name ‘Murabba’ references the historical Murabba Palace in Riyadh, connecting the contemporary development to the city’s architectural heritage. AtkinsRealis’s design translates these traditional elements into a contemporary context while incorporating AI-driven digital display surfaces that transform the building’s exterior into a programmable visual platform.

The 15-minute city concept serves as the masterplan’s organizing principle, placing all essential services — schools, healthcare, mosques, retail, parks, and workplaces — within walking distance of every residence. This approach, pioneered by urbanist Carlos Moreno and implemented in Paris, Melbourne, and Barcelona, has not previously been applied at the scale that AtkinsRealis designed for New Murabba. The pedestrian-oriented infrastructure, cycling paths, and green corridors connecting neighborhoods required AtkinsRealis to fundamentally rethink the relationship between building density, service provision, and transportation in a way that departs from Riyadh’s car-dependent urban fabric.

Masterplan Specifications and Zone Allocation

AtkinsRealis’s masterplan allocates the 19 square kilometers (14 million square meters of buildable area) across functional zones that serve the district’s mixed-use character. The residential zones accommodate 104,000 units across density gradients from high-rise apartment towers to family-oriented housing blocks. The commercial precincts deliver 1.4 million square meters of Grade-A office space positioned to compete with KAFD for premium tenants, including the 780-plus multinational firms establishing Riyadh headquarters under the RHQ program.

The retail and entertainment allocation of 980,000 square meters, combined with 80-plus entertainment and cultural venues, creates the foot traffic infrastructure that supports the district’s premium pricing model. Community facilities totaling 1.8 million square meters include a technology and design university, healthcare centers, schools, and mosques — the institutional infrastructure that anchors long-term residential demand.

The Mukaab District at the masterplan’s center encompasses 1.7 million square meters of hospitality floor space, with 9,000 hotel rooms planned across the broader district. AtkinsRealis’s design for this precinct integrates The Mukaab structure — now suspended — with surrounding mixed-use development that continues independently. The 620,000 square meters of leisure facilities provide the entertainment and cultural programming that differentiates New Murabba from conventional office-residential developments.

The Mukaab: Engineering and Design Ambition

The Mukaab itself represents AtkinsRealis’s most ambitious structural design: a 400m x 400m x 400m cube enclosing 2 million square meters of floor space — enough to contain 20 Empire State Buildings. The structure features a spiraling internal tower encased within a holographic dome designed for multi-sensory immersive experiences. The interior includes advanced sound, lighting, and spatial technologies that would create what NMDC describes as the world’s first fully enclosed skyscraper complex.

The engineering challenges inherent in this design are significant. The 160,000-square-meter floor plate is 30 to 40 times larger than a conventional 400-meter skyscraper. The 640,000 square meters of triple-function facade must serve as structural cladding, weather barrier, and digital display surface simultaneously. Wind loads on the cube’s flat faces exceed those experienced by conventional tapered or aerodynamic tower profiles. These challenges contributed to the context surrounding the January 2026 construction suspension.

AtkinsRealis’s design response to these engineering challenges demonstrates the firm’s technical depth. The facade system’s overlapping triangular geometry is not merely aesthetic — the triangular panel arrangement provides structural rigidity that a flat panel system would lack, distributing wind loads across interconnected geometric elements. The design draws on AtkinsRealis’s experience with complex facade systems on projects across the Gulf region.

Saudi Arabia Portfolio and Regional Presence

AtkinsRealis has extensive Saudi presence, with active involvement across multiple Vision 2030 projects. The firm’s regional portfolio spans infrastructure, transport, water, defense, and urban development projects across the Kingdom and the broader Gulf Cooperation Council region. This regional familiarity provides operational advantages in navigating Saudi regulatory frameworks, supply chain dynamics, labor market conditions, and climate-specific design requirements that affect construction in Riyadh’s extreme environment.

The firm’s global portfolio includes landmark projects that demonstrate the scale of engineering and design capability relevant to New Murabba. Their infrastructure and urban development experience across Asia, Europe, and the Middle East provides design precedents and engineering knowledge that inform the solutions required for New Murabba’s unique challenges.

Technology Integration Role

AtkinsRealis’s masterplan integrates technology partnerships across the development. The design platform coordinates with Naver Cloud’s smart city technology — robotics, autonomous vehicles, AI-powered building management, and digital construction monitoring — ensuring that technology systems are embedded in the district’s physical infrastructure rather than retrofitted. STC Group’s 5G and IoT connectivity infrastructure is designed into building specifications, with data pathways and equipment spaces incorporated into the structural design.

The sustainability features — 25 percent green space allocation, renewable energy integration, passive architecture principles, closed water loop system, and operational net zero target by 2060 — are integrated at the design level rather than added as compliance overlays. This design-led approach to sustainability supports the green building certifications that institutional investors increasingly require and positions New Murabba assets for ESG-focused REIT inclusion.

Contractor Coordination and Design Oversight

Within the New Murabba contractor ecosystem, AtkinsRealis works alongside Bechtel and China Harbour Engineering Company (construction), AECOM (project management), Arup (stadium design), and Naver Cloud (technology). AtkinsRealis’s role as masterplanner and design authority means their specifications guide the work of all other contractors, making them the design coordination hub for the entire development.

This coordination role requires managing the interfaces between design intent and construction reality across a multi-contractor, multi-phase development program. AECOM’s PMC oversight provides independent verification that construction deliverables conform to AtkinsRealis’s design specifications. CEO Michael Dyke’s infrastructure delivery experience — including the London 2012 Olympics — provides NMDC leadership with the operational perspective to manage the design-construction interface effectively.

Phased Design Adaptation and Future Flexibility

AtkinsRealis’s masterplan incorporates design flexibility that allows later phases to adapt to market feedback and technology evolution. While the overall district layout — street grid, green corridors, infrastructure networks, zone allocations — is fixed by the Phase 1 design, individual building specifications within later phases can be adjusted based on lessons learned from Phase 1 occupancy. If Phase 1 data shows that 2-bedroom apartments achieve faster absorption than studios, Phase 2 residential buildings can adjust unit mix accordingly. If office tenants demonstrate preference for specific floor plate configurations, later commercial buildings can incorporate those preferences.

This adaptive capability is particularly valuable over the 15-year development timeline. Construction technology, building material innovations, and tenant expectations will evolve between 2026 and 2040. AtkinsRealis’s design framework must accommodate these changes without requiring wholesale masterplan revision — a balance between design consistency (maintaining the district’s architectural identity) and specification evolution (incorporating advances in energy efficiency, connectivity, and materials science).

Investment Implications of AtkinsRealis’s Role

For investors evaluating construction execution risk, AtkinsRealis’s appointment as masterplanner and lead designer provides confidence in the design quality and technical feasibility of the district (separate from The Mukaab’s specific engineering challenges). Their floor area data directly informs rental yield models and valuation frameworks.

The design authority relationship between AtkinsRealis and the construction contractors has important implications for quality control. When construction teams encounter ambiguities in specifications or conflicts between design documents, AtkinsRealis’s interpretation takes precedence. This single-source design authority prevents the quality inconsistencies that arise when multiple interpretations of design intent compete across a multi-contractor site. AECOM’s project management consultancy uses AtkinsRealis specifications as the definitive standard for construction quality measurement.

The masterplan’s zone allocation determines the supply mix that investors must evaluate against Riyadh market demand. Current market data supports the allocation: Riyadh Grade-A office occupancy at 98 percent validates the commercial precincts, residential sales surging 63 percent year-on-year supports the housing zones, and gross rental yields of 8.89 percent confirm the investment returns available in the Riyadh market.

Climate-Responsive Design for Riyadh’s Extreme Environment

AtkinsRealis’s design for New Murabba addresses Riyadh’s specific climatic challenges — summer temperatures exceeding 45 degrees Celsius, annual rainfall of approximately 100 millimeters, periodic sandstorms, and extreme temperature differentials between day and night. The masterplan incorporates passive design strategies that reduce energy demand before active systems (HVAC, mechanical cooling) are engaged.

Building orientation maximizes natural shading during peak solar hours. Interior courtyard designs — drawing on traditional Najdi architecture that inspired The Mukaab’s aesthetic — create shaded outdoor spaces where air temperature is moderated by evaporative cooling and reduced solar exposure. Street-level shading through building canopies, pergolas, and tree planting creates pedestrian comfort zones that support the 15-minute city concept even during Riyadh’s hot months.

The 25 percent green space allocation serves as a thermal buffer. Vegetated areas reduce surface temperatures by 10-15 degrees Celsius compared to paved surfaces, creating microclimate benefits that extend to adjacent buildings. Landscape design specifies drought-tolerant, native and adapted plant species that thrive with minimal irrigation — supported by the closed water loop system that recycles treated water for landscape maintenance.

AtkinsRealis’s sustainability specifications align with the operational net zero by 2060 target. Building envelope design — wall thickness, glazing specification, insulation values — minimizes thermal transfer, reducing cooling loads by an estimated 30-40 percent compared to standard Riyadh construction. Solar-responsive facade elements automatically adjust to light conditions, reducing glare and heat gain while maintaining natural daylight levels that improve occupant wellbeing and productivity.

Competition Win and Design Authority

AtkinsRealis’s selection through a competitive international process in 2022 — rather than a direct appointment — strengthens the design credibility of the New Murabba masterplan. International design competitions attract submissions from leading global firms, and the winning entry must demonstrate both architectural vision and engineering feasibility to prevail over competitors. The formal appointment announcement in December 2023 confirmed the scope of AtkinsRealis’s mandate, encompassing both the district masterplan and The Mukaab structure itself.

Edward McIntosh’s role as Regional Creative Design Director placed him at the intersection of architectural ambition and engineering reality. McIntosh led the design team through the competition phase and into the detailed design development that translates conceptual drawings into construction specifications. His continued involvement provides design continuity — ensuring that the vision presented in the competition entry is maintained as construction contractors interpret and build from AtkinsRealis’s documentation.

The design authority role means AtkinsRealis’s specifications take precedence when construction teams encounter ambiguity or conflicts in documentation. In a multi-contractor environment — with Bechtel, CHEC, and other firms working simultaneously across the site — a single authoritative design source prevents the inconsistencies that arise when multiple interpretations of design intent compete. AECOM’s project management consultancy references AtkinsRealis’s specifications as the definitive standard against which construction quality is measured.

The firm’s corporate transition from Atkins to AtkinsRealis (following the merger with SNC-Lavalin’s engineering services) expanded the firm’s capabilities in nuclear, transportation, and environmental engineering alongside the urban design and architecture practice that won the New Murabba commission. This broader capability set means AtkinsRealis can provide integrated design solutions that address infrastructure, utilities, and environmental engineering alongside architectural design — reducing the coordination gaps that arise when multiple design firms share responsibility across different building systems.

The development timeline maps AtkinsRealis’s phased delivery milestones from Phase 1 (2030 Expo) through Phase 4 (2040 full build-out). For masterplan specifications, see the New Murabba masterplan overview. Our investment analysis applies AtkinsRealis’s floor area data to financial models. The dashboards track design and construction milestones with quarterly updates. Premium Intelligence subscribers receive monthly design progress reports.