Peter Kibugi is the founder and managing director of Crystal Pearl Real Estate
Africa's housing crisis is often discussed in terms of land availability, population growth, urbanisation, and public policy. Yet beneath all these factors lies a more fundamental challenge: financing. In Kenya alone, the housing deficit exceeds two million units and continues to grow by an estimated 200,000 homes annually.
Across the continent, millions of families remain without adequate shelter, not necessarily because land is unavailable, nor entirely because political will is lacking, but because the financial structures required to build housing at scale for low- and middle-income households have historically been too weak, too expensive, or too risk-averse. That reality is beginning to change. Development finance institutions, impact investors, government-backed guarantee schemes, and specialised housing funds are helping create a more robust financial architecture for affordable housing.
Yet outside specialist circles, the mechanics of how affordable housing is financed remain poorly understood. Understanding how capital is raised is critical because every successful housing development begins long before construction starts. It begins with assembling the right mix of funding.
Understanding the capital stack.
Every affordable housing project is financed through a combination of funding sources commonly referred to as the capital stack. The concept is straightforward. Different types of capital occupy different positions within a project's financing structure depending on the level of risk they assume and the returns they expect. At the foundation sits senior debt, typically the least expensive source of funding because it carries the lowest risk. Above it sits mezzanine debt, which fills financing gaps but comes at a higher cost.
At the top is equity, which bears the greatest risk but also seeks the highest returns. Affordable housing projects frequently incorporate a fourth layer: concessional funding from governments, development finance institutions, or grant providers. This capital is often designed to absorb risk or reduce financing costs, helping projects remain affordable while still attracting commercial investors. Getting this structure right is essential. Every layer of capital has a different cost, repayment priority, and risk profile.
Developers who rely excessively on expensive financing can quickly erode margins and undermine the long-term viability of their projects.
Senior debt: The foundation of housing finance
For most housing developments, senior debt forms the backbone of the financing structure. Senior lenders typically hold the first legal claim over a project's assets. In practical terms, this means they are repaid before any other lenders or investors if a project encounters financial difficulties. Because their risk is lower, senior lenders are able to offer relatively favourable interest rates. In Kenya and across East Africa, senior debt is increasingly available through multiple channels.
Commercial banks remain important providers, but development finance institutions such as the International Finance Corporation and the European Investment Bank have become significant players. Specialised mortgage refinance institutions are also helping deepen access to long-term capital. One notable example is the Kenya Mortgage Refinance Company (KMRC), established to provide long-term funding to primary mortgage lenders at affordable rates.
By helping lenders access stable financing, KMRC has expanded access to housing finance and strengthened the broader affordable housing ecosystem. Securing senior debt, however, requires extensive preparation. Developers must demonstrate that projects are commercially viable, possess the necessary approvals, have realistic construction schedules, and show credible demand for the completed units.
Lenders closely scrutinise factors such as loan-to-cost ratios, construction timelines, and projected sales or occupancy levels before committing capital.
Filling the gap with mezzanine financing .
Even when senior debt is secured, it rarely covers all development costs. This is where mezzanine financing becomes important. Positioned between senior debt and equity in the capital stack, mezzanine financing helps bridge funding gaps that traditional lenders are unwilling to cover. It allows developers to access additional capital without immediately diluting their ownership stakes. Mezzanine lenders often include real estate investment funds, insurance companies, private investors, and specialised financing vehicles. While they generally do not hold the same rights as senior lenders, they are compensated for the additional risk through significantly higher returns.
The cost of mezzanine financing can be substantial, particularly in emerging markets where risks associated with construction, currency fluctuations, and market absorption remain elevated. Despite its higher cost, mezzanine capital often determines whether a project proceeds or stalls. When used strategically, it enables developments to reach financial close and move into construction. When overused, however, it can place excessive pressure on project economics and undermine affordability objectives.
Equity: The capital that takes the greatest risk
At the top of the capital stack sits equity. Unlike debt financing, equity does not require fixed repayments. Instead, investors provide capital in exchange for ownership interests and a share of future profits. Because equity investors are repaid only after lenders have been satisfied, they assume the highest level of risk. In return, they seek a proportionately higher share of project returns. Affordable housing projects typically attract equity from multiple sources.
Developers are expected to contribute their own capital, demonstrating commitment and confidence in the project. Institutional investors, family offices, private equity funds, and impact investors often provide additional equity. Increasingly, development finance institutions are also participating directly as equity partners. This trend reflects growing recognition that affordable housing represents not merely a social intervention but also a long-term investment opportunity. Institutional equity can play a transformative role by providing patient capital capable of supporting projects through lengthy development timelines while maintaining affordability objectives.
Why blended finance matters
One of the greatest challenges facing affordable housing developers is the mismatch between the returns investors expect and the returns affordable housing projects can realistically generate. Affordable rents are, by definition, lower than market rents. While this serves an important social purpose, it can also make projects less attractive to purely commercial investors. Blended finance has emerged as one of the most effective tools for addressing this challenge.
The model combines concessional capital with commercial capital within a single financing structure. By strategically allocating risk among different participants, blended finance makes projects more attractive to investors who might otherwise consider them too risky. A typical structure may involve a development finance institution providing a first-loss facility that absorbs initial losses if a project underperforms. Additional concessional financing may occupy intermediate positions in the capital stack, while commercial investors participate through senior financing layers protected by these risk-sharing mechanisms. The result is a financing structure capable of mobilising substantially larger amounts of private capital than would otherwise be possible. For a continent facing enormous housing shortages, this leverage is essential.
Expanding the financing toolkit
Affordable housing finance is also becoming increasingly innovative. Green bonds, housing-focused investment funds, and government-backed guarantee schemes are creating new pathways for capital mobilisation. These instruments allow developers to access larger pools of funding while aligning housing development with broader goals such as environmental sustainability and financial inclusion.
Credit guarantee programmes, in particular, have shown promise in expanding access to mortgage financing for households that traditionally struggle to qualify for conventional loans, including workers in the informal sector. As governments, investors, and development institutions continue to refine these tools, the range of financing options available to affordable housing developers is steadily expanding.
Yet raising capital is only the first challenge. Once financing is secured, developers face an equally demanding task: deploying that capital efficiently, controlling costs, and ensuring that projects remain affordable from groundbreaking to completion. That challenge will be explored in Part II of this series.
The writer is the founder and managing director of Crystal Pearl Real Estate
