Do You Really Need an Architect and Engineer to Build a House in Kenya?

Building a house is one of the biggest investments most Kenyan families will ever make. Whether you are putting up a simple bungalow on a rural plot or a modern maisonette on the outskirts of Nairobi, Kiambu or Mombasa, the same question keeps coming up. Do you really need a registered architect and a structural engineer or can you hire a skilled fundi and get the job done?

The short answer is yes. For almost every permanent house you need both professionals. A quantity surveyor usually completes the core team. The longer answer explains why the law demands them, why your safety and budget depend on them and what happens when people try to skip this step.

What the law requires
Kenyan law is clear. Under the Architects and Quantity Surveyors Act (Cap. 525), architectural drawings submitted to a county government for building approval must be prepared and signed by an architect registered with the Board of Registration of Architects and Quantity Surveyors (BORAQS). Structural drawings must come from an engineer registered with the Engineers Board of Kenya (EBK). Quantity surveyors are also registered under BORAQS. Counties will not accept plans signed by unregistered draughtsmen or ordinary masons.
This requirement sits within the Physical and Land Use Planning Act 2019 and the National Building Code 2024. Without stamped drawings you cannot get a building permit. Without a permit the National Construction Authority (NCA) can issue stop orders. The county can order demolition and you may face fines or even criminal liability. Banks and SACCOs also usually refuse to release construction loans until approved plans are in place.

How the professionals fit into the approval process
The approval process involves each of them in turn. First the architect designs the layout, room sizes, elevations and site plan while checking compliance with zoning, setbacks, plot coverage and height limits. Once the county approves the architectural plans, the structural engineer submits drawings covering foundations, beams, columns, slabs and load calculations. This stage is especially strict on difficult soils such as black cotton soil. The quantity surveyor then prepares the bill of quantities, which lists every material, labour item and provisional sum with measured quantities and rates.
After both sets of drawings are approved, most projects still need NCA registration and many need NEMA clearance. A summary of the bill of quantities signed by a registered quantity surveyor is often required for NCA registration on projects above certain value thresholds. County planning departments check each document against local by-laws, zoning maps and the building code. Inspectors later confirm that the work on site matches what was approved. When it does not, stop-work orders follow. Skipping registered professionals is one of the main reasons applications are rejected or delayed.
The architect: more than drawings
An architect does far more than draw pretty pictures. The architect translates your needs into a functional, safe and efficient home. Good design considers natural light, ventilation, privacy, the flow between rooms and how the house will age. Kenya's climate ranges from the humid coast to the cooler highlands, so the architect also advises on orientation, roof overhangs and materials that reduce heat gain or improve comfort. Without professional input many owner-builders end up with awkward layouts, wasted space or houses that feel dark and poorly ventilated.
The structural engineer: protecting lives
Kenya has seen repeated building collapses. Between 2020 and late 2026 media reports recorded dozens of collapses that killed scores of people and injured many more. Investigations keep pointing to the same causes: inadequate foundations on poor soil, missing or badly placed reinforcement, substandard concrete, extra floors added without redesign and weak site supervision.
Recent incidents include a multi-storey building under construction that collapsed in Eastleigh while shops on the ground floor were open. In South C and Karen the failures involved unauthorised extra floors or timber props used instead of proper steel supports during casting. These causes were all preventable.
Soil is a major factor. Black cotton soil, common in parts of Nairobi, Kiambu and the Rift Valley, expands when wet and shrinks when dry. Foundations that ignore this behaviour settle unevenly and crack walls, floors and beams. Yet soil testing is often skipped. An engineer orders a geotechnical investigation or at least trial pits and designs the foundation to match the actual ground. Raft, piled or deeper strip foundations cost more at the start but prevent expensive repairs later. Owner-builders who rely on a fundi's experience from a previous site often discover too late that the ground was different.
Material quality is another weak point. Forensic reports after collapses regularly mention substandard cement, under-reinforced concrete and poorly cured members. Registered professionals specify minimum concrete grades, steel diameters and curing periods and can recommend testing of materials delivered to site. Without that oversight a contractor under pressure to cut costs may substitute cheaper options. The result is a building that looks finished but hides serious weaknesses.
The quantity surveyor: protecting your budget
The quantity surveyor measures and values the works. The job starts with a detailed bill of quantities based on the architect's and engineer's drawings. This document becomes the basis for competitive tenders from contractors. During construction the quantity surveyor measures completed work, values interim payment certificates and advises on variations. At the end the quantity surveyor prepares the final account so you know exactly what you owe and why.
Without this role many owners discover halfway through the project that the budget is gone because materials were underestimated, labour rates were unrealistic or unplanned changes piled up. A good bill of quantities also makes material substitution harder to hide because the specified quantities and standards are recorded in writing. It ensures that higher foundation costs on poor soil are budgeted from the start rather than appearing as a surprise midway. A good quantity surveyor keeps you in control of cost from the first estimate to the last payment.
What happens when you skip them
Consider a typical example. A family in Kiambu decides to build a two-storey maisonette on a plot with black cotton soil. To save money they skip the professionals and hire a fundi who has built several houses nearby. The fundi uses a standard strip foundation that works on firmer ground. Within two years, after heavy rains, the walls develop diagonal cracks, doors refuse to close and the upper floor begins to lean. The repair bill exceeds what the family would have paid the architect, the engineer and the quantity surveyor combined.
A neighbour who engaged all three professionals received a design with deeper foundations or a reinforced raft slab together with a realistic bill of quantities. That house remains sound and its final cost stayed close to the original estimate. The difference is not luck. It is engineering based on site-specific data combined with accurate cost planning.

Are there any exceptions?
There are limited situations where the full team may not be strictly required. Very small single-storey owner-occupied structures built entirely with traditional local materials sometimes fall under narrower exemptions in certain rural settings. Even then many counties still demand some form of approval. Any permanent house using cement blocks, steel or concrete almost always needs full drawings. Even in rural areas the trend is toward greater formality as counties extend development control and the National Building Code applies nationally.
Extensions that alter load-bearing walls or add significant weight also require an engineer. Interior renovations that do not touch the structure may need only an architect or none at all. For anything meant to house a family for decades the safe and legal path includes the architect, the engineer and usually the quantity surveyor.
Ready-made plans and the stamping shortcut
Some owners look for a middle path. Ready-made plans can be a sound starting point as long as a registered architect adapts them to your plot and takes full responsibility for the final drawings. The shortcut to avoid is buying plans or hiring a draughtsman and then asking an architect only to stamp the result. The stamping professional remains legally responsible. If the design is deficient the architect or engineer can refuse to sign or demand major changes. Counties increasingly check that the professional who stamped the plans is the one who prepared them.
The same applies to cost. Relying on a contractor's rough estimate instead of an independent bill of quantities often leads to disputes when quantities change or rates prove unrealistic.
Building with earth materials
If you are building with stabilised soil blocks or rammed earth, professional input matters even more. Earth has excellent thermal mass and low embodied energy but demands careful detailing for moisture protection, foundations and wall thickness. An architect experienced with these systems designs overhangs and plinths that keep water away from the walls. The engineer verifies compressive strength, wall thickness and the connection to the roof structure. The quantity surveyor measures the specialised materials and the labour needed for proper compaction and curing so that the budget reflects reality. When these steps are followed, earth houses perform well and gain wider acceptance. When they are skipped, failures feed the mistaken idea that earth construction is unreliable.
Time and financing
Time is another factor people underestimate. Preparing the drawings, structural calculations and bill of quantities takes effort. Securing approval can then add several weeks to a few months depending on the county and the completeness of the submission. That wait feels long when the land is already bought. Yet starting without approval risks far longer delays once a stop order arrives. Families who wait for the stamps usually finish sooner overall because they avoid those interruptions. Early involvement of a quantity surveyor also prevents the common problem of running out of money before the roof is on.
Financing reinforces the requirement. Banks and many SACCOs release construction loans in stages against approved plans, professional certificates and interim valuations prepared by the quantity surveyor. Selling is also smoother when a buyer's lawyer or bank can see the approved drawings, the occupation certificate and a clear final account. Houses built without these documents often sell at a discount or face complications during transfer. Insurers and future buyers look for the same proof.
The bottom line
The pattern across Kenya is consistent. Where professionals are engaged early and their designs and cost plans are followed, buildings stand and budgets hold. Where corners are cut on design, supervision or materials, failures follow. The human cost is real. Families have lost savings when illegal or incomplete houses were demolished. Others live with cracked walls, leaking roofs and the constant worry that the structure might fail. In the worst cases people have died.
The practical recommendation is straightforward. Engage a BORAQS-registered architect, an EBK-registered structural engineer and a BORAQS-registered quantity surveyor before any serious design work begins. Verify their current practising licences. Let them handle the drawings, the structural calculations, the bill of quantities and the submission process. Budget for their fees as a normal part of the project rather than an optional extra.
Building without these professionals is possible only in very narrow circumstances and even then it carries real risks. For the great majority of houses going up across Kenya today the answer is clear. Yes, you need an architect, an engineer and a quantity surveyor. The law requires the first two for approvals while safety demands all three. The long-term cost of skipping them is almost always higher than the fees themselves. Take the time to hire the right team. Your future self and your family will be glad you did.