New Murabba Update: $50B Project Delayed to 2040, The Mukaab Status, and Construction Pace

In the northwest quadrant of Riyadh, on a 19-square-kilometer site that represents one of the largest urban development parcels in the world, Saudi Arabia is attempting to build a new downtown for its capital city. New Murabba, announced by Crown Prince Mohammed bin Salman in February 2023, is conceived as a mixed-use destination anchored by The Mukaab—a 400-meter cube that would be the largest enclosed structure ever built. With a reported budget of $50 billion and original completion targets that suggested delivery by the mid-2030s, the project represented another audacious entry in Saudi Arabia’s expanding portfolio of giga-projects. By early 2026, the reality has become more complex. Timeline extensions pushing significant completion toward 2040, construction pace that observers describe as deliberate rather than urgent, and the broader context of giga-project reprioritization all suggest that New Murabba is entering a phase of recalibration. This is a comprehensive assessment of where the project stands.

The Vision: What New Murabba Is Meant to Be

New Murabba is designed as more than a building or even a neighborhood—it is conceived as a new central business district for Riyadh, a city that currently lacks a defined downtown in the Western sense. Riyadh’s urban geography is polycentric, with commercial, governmental, and residential activity distributed across multiple centers connected by highways. New Murabba aims to create a gravitational center—a place that defines Riyadh’s identity and functions as the heart of the capital.

The 19-square-kilometer master plan encompasses an estimated 25 million square meters of floor space, including commercial towers, residential developments, hospitality venues, retail areas, cultural institutions, and the centerpiece Mukaab structure. The development is planned to accommodate over 400,000 residents and create 334,000 jobs, making it one of the most ambitious urban development projects currently underway anywhere in the world.

The master plan is organized around a series of urban districts, each with a distinct character and function. The commercial district is designed to attract regional and global corporate headquarters, competing with established Gulf business centers in Dubai and Abu Dhabi. The residential districts offer housing across multiple price points, from luxury apartments to more accessible family homes. The cultural district includes museums, performance venues, and public art that position New Murabba as a cultural destination. The retail and hospitality district encompasses hotels, restaurants, shopping, and entertainment.

Transportation infrastructure is a critical enabler of the plan. New Murabba is designed to be integrated with Riyadh’s expanding metro system, providing public transit connectivity that most Saudi developments lack. A network of pedestrian-priority streets, cycling infrastructure, and autonomous transit systems within the development is planned to create an urban experience that prioritizes human-scale movement over car dependency.

The Mukaab: The World’s Largest Cube

The Mukaab is the iconic centerpiece of New Murabba and one of the most architecturally ambitious structures ever proposed. At 400 meters on each side—roughly the width and height of the Empire State Building—The Mukaab would enclose a volume sufficient to contain 20 Empire State Buildings. The structure is designed not as a solid building but as an enclosed space—essentially a massive shell within which a complex of buildings, public spaces, gardens, and attractions would be constructed.

The interior of The Mukaab is described in project materials as an immersive destination featuring a holographic display system on the interior surfaces of the cube that can project environments ranging from underwater scenes to outer space. Within this projected environment, a spiral tower of interconnected buildings would house hotels, residences, commercial space, entertainment venues, and cultural attractions, all organized around a central void that allows views and light to penetrate the structure.

The engineering challenges of The Mukaab are formidable. A 400-meter cube creates enormous structural forces—the roof alone, spanning 400 meters without intermediate support columns that would obstruct the interior volume, requires structural solutions at the edge of current engineering capability. Wind loading on the flat surfaces of a cube of this size generates forces significantly different from the aerodynamic profiles of conventional skyscrapers. Thermal management within a 400-meter enclosed volume in a climate where exterior temperatures regularly exceed 45 degrees Celsius requires cooling capacity of a magnitude that challenges existing HVAC technology.

The holographic display system, while conceptually compelling, raises questions about technological feasibility at the proposed scale. Projecting coherent images on interior surfaces spanning 400 meters by 400 meters, visible from varying distances and angles within the structure, requires display technology that does not currently exist in production form. Whether such technology can be developed and deployed within the project timeline is one of the significant uncertainties facing The Mukaab.

Foundation engineering for The Mukaab must accommodate the enormous weight of the structure while addressing the geological conditions of the Riyadh site. The limestone geology of central Riyadh provides generally favorable foundation conditions, but the concentration of load from a structure of this scale requires deep foundation systems and careful geotechnical analysis.

The Delay: From Mid-2030s to 2040

The extension of New Murabba’s completion timeline from original targets in the mid-2030s toward 2040 reflects several converging factors that are affecting giga-projects across the Saudi portfolio.

Resource competition is perhaps the most significant factor. Saudi Arabia is simultaneously developing multiple giga-projects—NEOM, Qiddiya, Red Sea Global, Diriyah Gate, King Salman Park, and others—each demanding massive quantities of construction materials, equipment, and specialized labor. The aggregate demand from these projects exceeds the capacity of the Saudi construction industry and, in some cases, the global supply chain for specialized components. New Murabba, as one of the later-announced projects, must compete for resources with initiatives that have more established pipelines and, in some cases, more pressing deadlines.

Design complexity has also contributed to timeline extension. The Mukaab in particular presents engineering challenges that require extended design development before construction can proceed with confidence. Unlike conventional buildings where established structural systems and construction methodologies can be applied, The Mukaab requires bespoke solutions for virtually every major building system. The design development process, involving iterative analysis, prototype testing, and specialist consultation, is inherently time-consuming and resistant to schedule compression.

Financial prioritization within PIF’s portfolio is another factor. With oil prices in a range that constrains sovereign revenue and PIF facing demands from across the Vision 2030 program, capital allocation decisions increasingly favor projects that are closest to completion or that serve the most pressing strategic needs. New Murabba, at a relatively early stage of development, is less likely to receive priority funding over projects that are further advanced and closer to generating returns.

Market conditions for the commercial and residential components of New Murabba also influence the timeline. The pace of demand for premium office space, luxury residences, and high-end retail in Riyadh, while growing, may not support the simultaneous delivery of 25 million square meters of space that the full New Murabba plan envisions. Phased delivery aligned with market absorption is both financially prudent and practically necessary.

Construction Pace: What Is Happening on Site

On-site activity at New Murabba in early 2026 reflects the early stage of the project and the deliberate pace that the extended timeline implies. Site preparation—earthworks, utility installation, and road construction—is underway across portions of the 19-square-kilometer site. This infrastructure work, while not visually dramatic, is essential groundwork that must be completed before building construction can commence.

Foundation work for The Mukaab has begun in preliminary form, with test piling and geotechnical investigation establishing the ground conditions and foundation design parameters. The full foundation construction for The Mukaab is expected to be one of the largest foundation projects ever undertaken, given the scale and weight of the proposed structure. The timeline for foundation completion is measured in years rather than months.

Early building construction in the peripheral districts of New Murabba has commenced, with some commercial and residential structures in the initial phases progressing through structural stages. These early buildings are conventional in design and construction methodology, distinct from the engineering challenges of The Mukaab itself. Their completion will provide the first habitable and usable spaces within the New Murabba development, establishing a presence on the ground while the more complex central components are developed.

Infrastructure construction, including roads, utilities, and public realm, is proceeding across the site. The installation of water, sewerage, power, telecommunications, and district cooling systems across a 19-square-kilometer site is a massive undertaking that will continue for years. The phased approach to infrastructure delivery prioritizes areas where building construction is most advanced, creating serviced parcels that can be developed progressively.

The construction workforce at New Murabba is significant but smaller than those at more advanced giga-project sites. As design development progresses and construction activity ramps up, the workforce is expected to grow substantially. Contractor selection for major packages, including The Mukaab structural work, is ongoing, with international and Saudi firms competing for what will be among the largest construction contracts in the kingdom.

Design Development: Evolution of the Plan

The New Murabba master plan has undergone evolution since its initial announcement, reflecting the iterative nature of large-scale urban planning and the influence of market feedback, engineering analysis, and strategic reassessment.

The fundamental concept—a new downtown district anchored by The Mukaab—remains intact. However, the phasing strategy has been refined to prioritize components that can be delivered earlier and generate revenue or occupancy sooner. Commercial and residential development in the peripheral districts, which use conventional construction methods and can be completed in standard timelines, is being prioritized over The Mukaab and other technically complex components.

The mix of uses within the plan has been adjusted to reflect evolving market analysis. The proportion of commercial office space has been moderated in response to questions about the depth of demand for premium office space in Riyadh, while residential and hospitality components have been increased to reflect stronger near-term demand signals. The retail component has been refined to emphasize experiential and destination retail rather than conventional mall format, reflecting global retail trends and the competitive dynamics of the Riyadh market.

Cultural and public realm components have been maintained as priorities despite cost pressures, reflecting the understanding that the quality of public spaces and cultural offerings is what distinguishes a great urban district from a mere collection of buildings. The investment in parks, plazas, cultural venues, and public art is seen as essential to creating the destination identity that will drive demand for the commercial and residential components.

The technology integration strategy for New Murabba has been recalibrated from some of the more speculative elements of the original plan toward more proven smart city technologies. While the vision of a technology-integrated urban district remains, the emphasis has shifted from cutting-edge experimental systems toward established technologies for energy management, mobility, security, and communications that can be deployed reliably and maintained cost-effectively.

Market Context: Riyadh’s Development Boom

New Murabba exists within a broader context of extraordinary development activity in Riyadh. The Saudi capital is undergoing a transformation of historic proportions, driven by government investment, population growth, and the kingdom’s strategy to position Riyadh as a global city.

The Riyadh Strategy, which targets growing the city’s population from approximately eight million to 15 million by 2030 and beyond, provides the macro context for New Murabba’s development. This growth ambition drives demand for the full spectrum of real estate—office space for headquarters and regional offices, housing for an expanding population, retail and entertainment for consumer spending, and hospitality for business and leisure visitors.

Concurrent major developments in Riyadh include King Salman Park, the Riyadh Metro (one of the world’s largest urban transit projects), the Sports Boulevard, the Green Riyadh initiative, King Abdullah Financial District, and numerous private sector developments. The cumulative investment in Riyadh’s transformation exceeds $100 billion, creating both opportunity and competition for New Murabba.

The headquarters relocation program, which has seen multinational companies establish regional headquarters in Riyadh as a condition for accessing Saudi government contracts, provides a specific demand driver for commercial space. Companies that have relocated or committed to Riyadh headquarters include many of the world’s largest corporations across consulting, technology, financial services, and industrial sectors. This demand, while significant, is finite—the number of multinationals requiring Riyadh headquarters is measurable in the hundreds, not thousands—and multiple developments are competing for these tenants.

New Murabba Development Company: Governance and Execution

The New Murabba Development Company, established as a PIF subsidiary to deliver the project, has assembled a management team drawn from international real estate development, construction, and urban planning backgrounds. The company’s organizational structure reflects the complexity of the undertaking, with dedicated teams for master planning, design management, construction delivery, commercial development, and operations.

The governance structure includes a board with representation from PIF and senior government officials, providing strategic direction and alignment with broader national objectives. The balance between commercial decision-making and strategic direction is a recurring theme in Saudi giga-project governance, with the tension between financial discipline and political ambition requiring careful navigation.

Partnerships with international firms provide technical expertise and credibility. Architectural and engineering firms, construction management consultancies, and specialist advisors from around the world contribute to the project’s development. These partnerships bring global best practices and technical capability while the domestic team provides local knowledge and institutional relationships.

The relationship between New Murabba Development Company and other Saudi giga-project entities is managed through coordination mechanisms that aim to optimize resource allocation, share lessons learned, and avoid duplication. In practice, the competition for resources and attention among giga-projects creates tensions that coordination mechanisms can only partially resolve.

Financial Structure and Investment

The $50 billion estimated cost of New Murabba is funded primarily by PIF, with the expectation that significant private sector investment will be attracted as the project matures. The financial structure anticipates that the initial phases—infrastructure, site preparation, and early buildings—will be primarily PIF-funded, with private developers, investors, and joint venture partners contributing to later phases as the project demonstrates market viability.

The scale of investment required raises questions about the financial return profile. A $50 billion investment in a mixed-use urban development, even in a growing city like Riyadh, requires long time horizons to generate adequate returns. The commercial case rests on assumptions about Riyadh’s growth trajectory, rental rates, occupancy levels, and the premium that the New Murabba brand can command over competing developments.

The phased approach to development mitigates financial risk by allowing investment to be adjusted based on market response. Rather than committing the full $50 billion upfront, PIF can modulate its investment pace based on demand signals, competitive dynamics, and broader economic conditions. This flexibility, while extending the timeline, reduces the risk of overbuilding in advance of demand.

Revenue generation will come from multiple sources: sale of residential units, lease of commercial and retail space, hotel operations, entertainment and cultural venue revenues, and the appreciation of land values within the development. The mix of revenue sources provides diversification, though the timing and magnitude of each revenue stream depend on the pace of development and market conditions.

Risks and Uncertainties

New Murabba faces several significant risks that must be managed over its multi-decade development timeline.

Engineering risk, particularly for The Mukaab, is substantial. The structure’s unprecedented scale and design create the possibility of technical challenges that could affect cost, timeline, or feasibility. While preliminary engineering analysis suggests The Mukaab is structurally achievable, detailed design and construction may reveal complications that are not apparent at the current stage of development.

Market risk is inherent in any development of this scale and duration. The 15 to 20 year timeline to full buildout means that New Murabba will experience multiple economic cycles, shifts in tenant and buyer preferences, and changes in the competitive landscape. The flexibility to adapt the plan to changing conditions is essential but constrained by infrastructure investments that lock in certain spatial configurations.

Execution risk reflects the challenge of managing a development of this complexity over an extended period. Maintaining design quality, construction standards, and strategic coherence across multiple phases and contractors requires sustained institutional capability that is difficult to maintain over decades.

Political and strategic risk arises from New Murabba’s dependence on continued government support. Changes in leadership priorities, fiscal constraints, or strategic direction could affect the project’s funding, pace, or scope. The alignment of New Murabba with the broader Riyadh Strategy provides some insulation, but the project’s enormous scale makes it vulnerable to strategic reassessment.

Conclusion

New Murabba represents one of the most ambitious urban development projects in the world, and the recalibration of its timeline from the mid-2030s toward 2040 reflects a maturation of approach rather than a failure of ambition. The delay acknowledges the reality that building a new downtown for a major capital city—particularly one anchored by the most structurally ambitious building ever proposed—cannot be accomplished to the standards required in a compressed timeframe.

The project’s fundamentals remain strong. Riyadh is growing rapidly, demand for quality urban space is increasing, and the strategic importance of a defined downtown for the capital is well understood. The Mukaab, if realized, would be a genuinely iconic structure that defines Riyadh’s skyline and identity for generations.

The challenge for New Murabba is sustaining momentum and commitment over a timeline that extends to 2040 and beyond. Giga-projects that stretch across decades must survive changes in leadership, economic cycles, competitive dynamics, and public attention. New Murabba’s success will ultimately be determined not by its launch announcement or its architectural renderings but by the quality and vibrancy of the urban district that emerges over the coming decades. That is a story that is only beginning to be written.