The Biggest Mistakes That Delay Construction Projects in Kenya (And How to Avoid Them)

​Kenya’s construction sector is a vital pillar of the national economy, but its landscape is increasingly marked by the skeletal frames of uncompleted hospitals, abandoned residential complexes, and stranded infrastructure projects. The scale of capital immobilized in these stalled initiatives is staggering. According to a recent special audit report by the Office of the Auditor-General, out of Ksh 515.1 billion allocated to flagship public projects between 2019 and 2024, a massive Ksh 304.4 billion—representing 59% of the total allocation—remained entirely unused. In the devolved government structures, at least 688 initiated projects valued at Ksh 23.3 billion have stalled indefinitely.

​The delays afflicting the Kenyan construction industry are rarely the consequence of a singular, unforeseeable event. Studies show that the average ratio of actual completion time to planned contract duration is 160.5% for road projects and 120.3% for building projects. These massive time overruns represent the culmination of cascading failures spanning the entire project lifecycle. If you are planning to build in Kenya, understanding these critical mistakes is your first line of defense.

​1. Plunging into Construction Without Legal and Feasibility Diligence

​The trajectory of a construction project is largely determined before the first shovel hits the dirt. One of the most catastrophic mistakes developers make is rushing to the ground-breaking phase without conducting exhaustive due diligence regarding land tenure. In Kenya, complex and historically fragmented land tenure systems pose a massive initial risk. Projects routinely stall because developers commence site mobilization only to be hit with sudden legal injunctions over double-allocated titles, fraudulent deeds, or unresolved ancestral land claims. For example, a Ksh 10 billion government initiative to construct a sub-county police headquarters in Kisumu West stalled completely due to a lack of valid title deeds for the designated land.

​During the procurement phase, another fatal error occurs: the "lowest-bidder fallacy." In an attempt to save money, clients frequently award contracts based almost exclusively on the lowest financial bid. This inevitably pairs clients with contractors who lack the necessary financial capacity, technical expertise, and heavy plant equipment required for complex execution. The contractor rapidly depletes their initial mobilization advance and, unable to finance the ongoing works, abandons the site.

​2. Severe Financial Mismanagement and Capital Constraints

​Financial constraints represent the most ubiquitous catalyst for construction delays. Across multiple empirical studies, delayed payment for completed works emerges as the paramount cause of time overruns in Kenya. When project owners fail to honor interim payment certificates in a timely manner, they trigger an immediate liquidity crunch for the contracting firm. The operational supply chain instantly fractures, material deliveries cease, and labor disputes or strikes rapidly materialize. This mechanism is starkly visible in Nairobi County, where a single contractor was awarded Ksh 869 million to build the Pumwani Lucky Summer, Majengo, and Gumba/Mabatini health facilities; due to financial and capacity constraints, all three sites were abandoned and left incomplete.

​Additionally, poor cost estimation by Quantity Surveyors guarantees that a project will run out of money. Estimators frequently make inaccurate quantity take-offs, omit crucial indirect costs like NEMA licenses or site security, and fundamentally fail to account for inflation and the fluctuating costs of imported materials like structural steel.

​In the residential sector, developers often rely on "off-plan" financing, where deposits from early buyers fund the construction. A common, disastrous mistake occurs when developers divert deposits collected for one project to purchase land and break ground on a second project. When sales decelerate, this pyramid-like structure collapses, leaving buyers financially exposed with legally complex contracts for apartments that exist only as deteriorating concrete skeletons.

​3. Geotechnical Negligence: The Black Cotton Soil Trap

​Treating geotechnical investigations as an optional, cost-saving luxury is a devastating mistake. A quintessential example of severe geotechnical risk in Kenya is "Black Cotton Soil," an expansive clay widely prevalent in rapidly urbanizing nodes like Kitengela, Syokimau, Athi River, and Juja.

​Black cotton soil absorbs water during the rainy season and expands dramatically, generating massive upward hydrostatic pressures, and then shrinks during dry seasons, creating deep fissures. If standard shallow foundations are placed directly on this soil, the building will rapidly exhibit severe defects, including deep diagonal wall cracks, buckling floor slabs, and sheared plumbing lines.

​The correct engineering solutions are highly capital-intensive. They require either mass excavation to remove the clay entirely and replace it with compacted hardcore and murram, or the construction of expensive suspended pad-and-column foundations. This typically adds 15% to 25% to the total foundation construction costs. Developers frequently try to evade the Ksh 15,000 to Ksh 25,000 cost of a professional soil test and proceed blindly. When the expansive nature of the soil is discovered mid-construction, the project must be abruptly halted, causing severe budget blowouts that frequently lead to permanent abandonment.

​4. Getting Tangled in the Regulatory Labyrinth

​The regulatory environment governing the built environment in Kenya is fragmented, requiring approvals from the County Government, the National Environment Management Authority (NEMA), and the National Construction Authority (NCA). Securing these approvals out of sequence is a primary cause of paralysis.

​A systemic failure exists where developers leverage the issuance of a single downstream permit (like an NCA registration) to legitimize site mobilization before they have actually secured the prerequisite county architectural approvals or NEMA environmental clearances. When county physical planning enforcement officers eventually audit the site and discover missing primary permissions, they issue a formal "Stop Order". Workers remain idle, contractors demand standby payments for unused equipment, and exposed construction materials deteriorate in the weather, collapsing the project timeline entirely.

​Furthermore, digital transformation failures compound these delays. Currently, 39 out of 47 Kenyan counties still process complex development applications manually, creating massive institutional backlogs. Even national digital rollouts have caused sector-wide stalls. When NEMA launched the Environmental Information Management System (ENVIS) portal in July 2025 without adequate phased testing, the resulting technical glitches and system instability effectively paralyzed the national environmental licensing process, freezing billions of shillings in private capital.

​5. Rigid Contract Administration and Scope Creep

​The legal framework binding the project owner, consultants, and contractor dictates how smoothly a project runs. In Kenya, common contracts include the Joint Building Council (JBC) form for private works, FIDIC for large infrastructure, and PPRA documents for government tenders.

​A poorly defined project scope at the moment of contract signing is an absolute guarantee of future delays. When architectural and structural drawings lack critical technical details, the architect must issue frequent Variation Orders to alter the original scope, design, or specified materials. This completely disrupts the contractor's resource scheduling and invalidates the initial cost estimates. Because older contracts like the JBC 1999 edition lack modern, expedited dispute-avoidance mechanisms, disagreements over the valuation of these extra works frequently result in a total cessation of works as the parties proceed to lengthy and expensive arbitration.

​6. Sidelining Professionals and the Deadly Cost of Non-Compliance

​The most disturbing and dangerous mistake in the Kenyan construction sector is the active marginalization of licensed professionals to minimize upfront consultancy fees. Kenya’s regulatory framework mandates that building designs and supervision be undertaken exclusively by professionals registered with bodies like the Board of Registration of Architects and Quantity Surveyors (BORAQS) and the Engineers Board of Kenya (EBK).

​Despite this, rogue developers frequently hire unregistered draftsmen or unqualified technicians to produce complex building plans. To bypass county approval processes, they utilize "credential renting"—paying a registered professional a nominal fee to stamp the drawings without ever reviewing the structural calculations or inspecting the physical site. Consequently, complex structural decisions are left to the discretion of semi-skilled site laborers. This lack of supervision leads to highly destructive practices: using unwashed, silt-heavy sand for concrete, omitting necessary steel reinforcement bars, failing to adequately wet and cure concrete for 28 days, and neglecting the engineering design of temporary shoring and scaffolding.

​The ultimate project delay is a catastrophic structural failure. The tragic collapse of the Manzil Towers in Nairobi's South C area on January 2, 2026, serves as a definitive synthesis of these systemic failures. The 14-storey building pancaked under active construction, resulting in the deaths of two security guards and triggering a massive multi-agency rescue operation. Investigations revealed that the building had initially been approved as a 12-storey development, yet the developer illegally continued construction to 14 storeys. Stop orders issued by Nairobi County enforcement officers in the preceding months were brazenly ignored. When a building collapses, the project is terminally aborted, becoming an active crime scene where millions of shillings are permanently destroyed. In the Manzil Towers case, the Director of Public Prosecutions approved manslaughter, abuse of office, and criminal negligence charges against 81 individuals, including the developers and high-ranking county planning officials.

​Conclusion

​The epidemic of delayed and stalled construction projects in Kenya is a complex crisis, but it is largely preventable. The root causes occur long before the foundation trench is excavated: in boardrooms where unrealistic budgets are approved, in flawed procurement processes prioritizing the lowest bidder, and in the conscious decisions to bypass registered professionals. To ensure your project succeeds and reaches completion, prioritize rigorous pre-construction planning, secure consistent financing, strictly follow sequential regulatory approvals, and never compromise on hiring fully registered architects and structural engineers.