Utilities are the systems that make a home functional. Water that flows when you turn on a tap, power that works when you flip a switch, drainage that clears when you flush a toilet — these are the basic operational requirements of any residential property, and their condition is often the last thing buyers think to check before committing to a purchase. That oversight is expensive.
A property that looks immaculate at the viewing stage can have plumbing that is silently corroding, electrical wiring that is dangerously undersized, a drainage system that backs up in heavy rain, or a water supply arrangement that leaves residents without running water for three days of every week. None of these problems are visible from the surface. All of them are discoverable through a systematic utility inspection conducted before the sale agreement is signed. All of them are costly and disruptive to remedy after you have already moved in.
This guide provides a complete framework for inspecting utilities before buying a home in Kenya. It covers every utility system relevant to residential property in Nairobi and beyond — water supply, power supply, backup systems, drainage, gas, and internet infrastructure — and explains what to look for, what to ask, and how to interpret what you find. It works directly alongside our articles on what to look for when viewing an apartment before buying and signs of poor construction in apartments, and connects to the full buying process in our complete guide to buying property in Kenya.
Why Utility Inspection Is Particularly Critical in Kenya
The case for thorough utility inspection before buying property is stronger in Kenya than in many other markets, for several reasons rooted in the specific characteristics of Kenya’s infrastructure environment and construction sector.
Municipal utility reliability in Nairobi is inconsistent. The Water Services Regulatory Board’s Annual Performance Report documents that Nairobi City Water and Sewerage Company supplies water for an average of fewer than twelve hours per day across its distribution network, with significant variation between zones. Kenya Power and Lighting Company’s service reliability data, published in its Annual Report, shows average outage durations that exceed the international benchmark of two hours per interruption in several distribution areas across Nairobi. This means the backup utility systems within a building — generators, boreholes, storage tanks — carry a disproportionate burden relative to their counterparts in cities with more reliable municipal services, making their condition and adequacy a critical evaluation factor.
Construction quality variation in Kenya means that utility installations within residential buildings range from professionally designed and executed systems to improvised installations carried out by unregistered contractors using substandard materials. The National Construction Authority, in its 2022 Annual Report, documented that electrical and plumbing deficiencies represent two of the three most frequently cited categories of complaint received from residential property buyers, suggesting that inadequate utility installation is a widespread rather than exceptional problem.
For buyers, this combination of infrastructure unreliability and construction quality variation means that the utility systems within a property are both more important and more variable in quality than in many comparable markets. A systematic inspection protects you from both categories of risk.
Inspecting the Water Supply System
Water supply is the utility whose failure causes the most immediate and sustained disruption to residential living in Kenya. A thorough water supply inspection covers four elements: the source of supply, the storage capacity, the distribution pipework within the property, and the water quality.
Confirming the Water Source
Ask the seller, developer, or agent to explain the building’s water supply arrangement clearly. There are three common configurations in Nairobi residential buildings.
The first is sole reliance on the Nairobi City Water and Sewerage Company mains supply. This is the least resilient configuration in Nairobi’s current infrastructure environment. A building that depends entirely on NCWSC supply will experience water interruptions whenever the municipal supply to the area is cut, which happens with the regularity documented in the Water Services Regulatory Board’s reports. For apartments in this category, understand the local supply schedule and the building’s track record of supply reliability before committing.
The second is NCWSC supply supplemented by roof tank storage. This is an improvement over sole mains reliance but still depends on the municipal supply being adequate and frequent enough to fill the tanks between interruptions. Confirm the capacity of the roof tanks relative to the building’s daily consumption — a building with 50 units consuming an average of 200 litres per unit per day requires at least 10,000 litres of storage to sustain a single day without municipal supply. Many Nairobi buildings have tanks that are significantly undersized for their occupancy.
The third is an on-site borehole, either as a supplement to or as a replacement for municipal supply. A properly drilled and licensed borehole, compliant with the Water Act 2016 and licensed by the Water Resources Authority, provides genuine supply independence. Ask the management corporation or developer to confirm that the borehole has a valid WRA licence, that the most recent yield test confirms adequate supply for the building’s requirements, and that water quality has been tested by an accredited laboratory against the Kenya Bureau of Standards KS 459 potable water standard within the past 12 months.
Checking the Pipework
The internal water supply pipework within the building and within the individual unit carries water from the storage tanks or the mains supply to every outlet. Its condition affects both water quality and supply reliability.
In buildings constructed before approximately 2005, the supply pipework may be galvanised steel, which corrodes internally over time. According to research published by the University of Nairobi’s Department of Civil and Construction Engineering, galvanised steel pipework in Nairobi residential buildings typically begins showing significant internal corrosion within 15 to 20 years of installation, releasing rust particles that discolour the water supply and progressively restricting the pipe bore. Water from a tap that runs rusty or discoloured on first flow, or that produces a metallic taste, is a reliable indicator of corroded galvanised pipework that will require replacement.
Modern buildings use PPR (polypropylene random copolymer) or CPVC pipework, which is corrosion-resistant, smooth-bored, and well-suited to Nairobi’s water chemistry. Confirm which pipework material is used in the building and unit you are inspecting, and factor the potential cost of pipework replacement into your valuation assessment if galvanised steel is found in an older building.
Turn on every tap in the property simultaneously and observe the pressure under combined load. Many buildings have supply pipework that is adequately sized for single-fitting use but that produces a significant pressure drop when multiple fittings operate simultaneously — a common consequence of undersized pipework within the unit or building distribution system. Inadequate pressure under load is a persistent inconvenience and a sign of undersized pipework that can only be remedied by re-piping.
Checking Hot Water Provision
Confirm how hot water is supplied to the property. Three systems are common in Nairobi residential buildings.
Electric storage water heaters — commonly called geysers — heat and store hot water in an insulated tank. They are simple, reliable, and independent of any fuel supply, but they have a recovery time between uses and consume significant electrical energy. Confirm that the geyser is sized appropriately for the number of bathrooms in the unit and that it has a functioning pressure relief valve, which is a safety requirement under the Occupational Safety and Health Act 2007.
Solar water heating systems, which are increasingly specified in newer Nairobi buildings in compliance with the Energy Act 2019’s renewable energy provisions and the Energy and Petroleum Regulatory Authority’s building energy standards, heat water using roof-mounted solar collectors. They require adequate roof solar exposure and a backup electric element for cloudy periods. Confirm that the solar panels are in good condition, that the system has been serviced recently, and that the electric backup element is functional.
Gas water heaters, either using piped gas or individual LPG cylinders, provide instant hot water without storage requirements. Confirm that any gas installation has been inspected and certified by an installer registered with the Energy and Petroleum Regulatory Authority under the LPG regulations.
Inspecting the Electrical System
The electrical system in a residential property must be adequate for the property’s load requirements, safely installed in compliance with the Electrical Wiring Regulations made under the Energy Act 2019, and inspected and certified by a qualified electrical engineer registered with the Engineers Board of Kenya.
The Distribution Board
Locate the electrical distribution board — the fuse box — for the unit and examine it carefully. A properly installed modern distribution board will use miniature circuit breakers rather than rewirable fuses, will include residual current devices protecting all socket circuits and the bathroom circuits, will be housed in a neat, properly labelled enclosure, and will show no signs of overheating such as burn marks, discolouration, or a smell of scorched insulation.
The Kenya Power and Lighting Company’s consumer safety guidance, published on its website and in its annual customer communications, specifies that all residential electrical installations in Kenya should include RCD protection on socket circuits. An absence of RCDs in a residential distribution board is a safety deficiency that represents a risk of electric shock in fault conditions.
Ask when the electrical installation was last inspected and whether an electrical installation condition report has been produced by a registered electrical engineer. Under the Electrical Wiring Regulations, electrical installations in residential buildings should be inspected and tested at intervals not exceeding five years. A building where the last inspection was more than five years ago, or where no inspection report is available, is carrying an unverified electrical safety risk.
Socket Testing
As noted in our article on what to look for when viewing an apartment, a plug-in socket tester — available at hardware stores in Nairobi for a few hundred shillings — tests each socket for correct wiring, presence of earth, and correct polarity in seconds. Test every socket in the property. Any socket that shows an error on the tester has a wiring fault that must be investigated and corrected before the installation is safe to use.
Count the number of sockets in each room. Nairobi apartments built before 2015 frequently have as few as two double sockets per bedroom and three or four in the main living area, which is inadequate for modern living patterns that involve multiple simultaneously charged devices, entertainment systems, and home office equipment. Inadequate socket provision forces the use of multiple extension leads, which is a fire risk. Factor the cost of additional socket installation into your assessment if socket provision is inadequate.
Checking the Supply Cable and Meter
For standalone houses or apartments with individual KPLC meters, confirm that the supply cable from the KPLC meter to the distribution board is in good condition and adequately sized for the property’s load requirements. Undersized supply cables overheat under full load and are a fire hazard. KPLC’s connection standards specify minimum cable sizes for different load categories, and a cable that appears undersized relative to the property’s load should be flagged for assessment by a registered electrical engineer.
Confirm that the KPLC meter is present, functional, and registered in the seller’s name or the management corporation’s name. An unregistered or tampered meter is a compliance issue that KPLC can enforce against the property owner and that creates a legal complication for the transfer of utility accounts to the new buyer’s name.
Inspecting the Backup Power System
In Nairobi’s power reliability environment, the building’s backup power system is as important as the main KPLC supply for sustained residential functionality. A comprehensive backup power inspection covers the generator, the automatic transfer switch, and the distribution arrangement for the backup supply.
The Generator
Ask the management corporation or developer for the generator’s technical specifications: its rated output in kVA, the load it is designed to serve, the fuel type, the fuel storage capacity, and the age and maintenance history of the unit. A generator sized for common areas only — typically 15 to 30 kVA for a medium-sized residential building — does not provide power to individual units. A generator sized for the full building load — typically 60 to 150 kVA for a 20 to 50 unit building — provides power to both common areas and individual units.
Confirm the maintenance contract details. A generator maintained under a formal service contract by a reputable generator service company, with scheduled maintenance at intervals specified by the manufacturer, will be significantly more reliable than one maintained informally. Ask to see the service records for the previous 12 months.
If possible, observe the generator startup during your inspection. A well-maintained generator should start within 10 to 15 seconds of a power interruption through the automatic transfer switch, deliver stable power within a few seconds of starting, and run without visible smoke, unusual noise, or vibration. A generator that is slow to start, produces excessive exhaust smoke, or runs roughly is due for maintenance or overhaul.
The Automatic Transfer Switch
The automatic transfer switch is the electrical device that detects a mains power failure and automatically switches the building’s electrical distribution from the KPLC supply to the generator. A properly functioning ATS is invisible in operation — residents simply experience the brief interruption as the generator starts, after which power is restored automatically.
A faulty ATS can cause the generator to fail to start on a power interruption, can cause dangerous back-feeding of generator power into the KPLC supply network, or can fail to switch back to mains supply when KPLC power is restored. Ask the management corporation when the ATS was last tested and whether any issues have been recorded with its operation.
Inspecting the Drainage and Sewerage System
Drainage failures in residential properties in Nairobi range from minor inconvenience to serious health hazard, and they are significantly more common than buyers typically expect. A systematic drainage inspection covers surface drainage, internal waste drainage, and the sewerage connection.
Surface and Stormwater Drainage
Walk around the external perimeter of the building or property during or shortly after rainfall if possible, or ask specifically about drainage performance during heavy rain. Observe whether water accumulates against the building’s foundation, whether surface water drains freely away from the property, and whether gutters and downpipes are clear and directing water to appropriate drainage points.
Ponding — areas where water accumulates and sits for extended periods — against a building’s foundation is a persistent source of moisture ingress to the basement or ground floor and a cause of foundation settlement in expansive clay soils, which are common in parts of Nairobi including Kilimani and Lavington. The Kenya Geotechnical Society has documented cases where inadequate surface drainage on clay soils has caused differential foundation settlement leading to structural cracking in residential buildings.
Internal Waste Drainage
Run all waste fittings in the property simultaneously — all basin taps, the shower, the kitchen sink — and observe the drainage rate. Slow drainage from any fitting indicates a partial blockage in the waste pipe from that fitting. A waste pipe that drains slowly when individual fittings are used but backs up when multiple fittings drain simultaneously indicates undersized waste pipework — a common construction deficiency in Nairobi apartments where the waste system was designed for minimum code compliance rather than realistic usage patterns.
Listen for gurgling sounds from waste traps when other fittings drain nearby. Gurgling indicates that waste water from one fitting is drawing the water seal from another fitting’s trap — a sign of inadequate trap venting in the waste pipe system. Inadequate trap venting allows sewer gases to enter the property through empty traps, creating both an unpleasant smell and a potential health risk from hydrogen sulphide and other sewer gas components. According to the Public Health Act, Chapter 242 of the Laws of Kenya, drainage systems in residential buildings must be designed and maintained to prevent the escape of sewer gases into occupied spaces.
Sewerage Connection
Confirm whether the building is connected to the Nairobi City County sewer network or relies on a private septic system. Buildings connected to the municipal sewer have lower long-term waste management costs and fewer maintenance obligations. Buildings with private septic tanks require periodic emptying by licensed liquid waste contractors registered with the National Environment Management Authority under the Environmental Management and Coordination Act 2015, the cost of which is borne by the management corporation or the property owner.
For buildings with septic systems, ask when the tank was last emptied and inspected, whether the soakaway or drain field is functioning adequately, and whether NEMA has issued any compliance notices related to the system. A septic system in poor condition or at the end of its useful life may require replacement at significant cost — typically Ksh 300,000 to Ksh 800,000 for a residential-scale system according to building services contractors operating in Nairobi — which would fall on the property owner or management corporation.
Inspecting Gas Installations
Not all residential properties in Nairobi use gas, but for those that do — whether through piped LPG, individual gas cylinders, or natural gas where available — the installation safety and compliance require specific checks.
For piped gas installations within a building, ask whether the system was designed and installed by a contractor registered with the Energy and Petroleum Regulatory Authority under the LPG regulations, and whether the system has been inspected and certified. A piped gas system without appropriate certification is an unquantified safety risk.
For individual LPG cylinder installations within a unit, check that the cylinder connection hose is not cracked, perished, or kinked, that the regulator is in good condition and functioning correctly, and that the cylinder is stored upright in a well-ventilated location away from heat sources. The Energy and Petroleum Regulatory Authority’s LPG consumer safety guidelines specify that gas cylinders in residential premises must be stored and connected in compliance with the applicable installation standards.
Conduct a simple gas leak check by applying a soap solution to all hose connections and regulator joints. Bubbles forming at any joint indicate a gas leak that must be corrected by a qualified LPG technician before the installation is used. Any smell of gas in the property during the viewing should be taken seriously and investigated before proceeding with the purchase.
Inspecting Internet and Telecommunications Infrastructure
In Kenya’s growing digital economy, internet connectivity infrastructure is no longer a secondary consideration in property evaluation. The Communications Authority of Kenya’s annual Sector Statistics Report documents significant and growing residential fibre broadband penetration in Nairobi, with providers including Safaricom Home Fibre, Zuku, Faiba, and several independent ISPs serving the city’s residential market.
For a property purchase, confirm whether the building has been pre-wired for fibre broadband — meaning conduits and cabling infrastructure are already installed to enable connection for any service provider to any unit — or whether residents must arrange individual connections that may require surface-mounted cable routing. A pre-wired building offers significantly cleaner installation and easier provider switching than one where each resident must negotiate their own cable entry point.
Confirm the current internet service available in the building, the providers who serve it, and the maximum speeds and reliability that current residents experience. Speed claims from service providers are theoretical maxima — the actual speeds experienced by residents in a specific building depend on the quality of the in-building distribution cabling, the number of simultaneous users, and the service provider’s local network quality. Speaking to existing residents about their internet experience in the building is more informative than the provider’s marketing literature.
Check whether the building has adequate mobile network coverage from all major Kenyan operators — Safaricom, Airtel Kenya, and Telkom Kenya. Poor indoor mobile coverage is a recurring complaint in some Nairobi buildings where the construction materials or building design attenuates mobile signals. This affects not just mobile data but voice calls and SMS, which remain important communication channels for many residents and tenants.
When to Bring a Professional
For any property purchase above Ksh 8 million, or for any property where your inspection raises concerns that you cannot fully evaluate without specialist knowledge, engaging a qualified building services engineer to conduct a professional utility inspection is strongly recommended.
A building services engineer registered with the Engineers Board of Kenya can assess the electrical installation condition, test the backup power system under realistic load conditions, evaluate the plumbing and drainage system design and condition, and produce a written report that gives you both a professional opinion on the utility systems’ condition and a credible basis for negotiating remediation or a price reduction where deficiencies are found.
The cost of a professional building services inspection for a residential property in Nairobi currently ranges from approximately Ksh 25,000 to Ksh 80,000 depending on the size and complexity of the property, according to fee benchmarks published by the Institution of Surveyors of Kenya. This cost is small relative to the purchase price of any Nairobi property and trivial relative to the cost of remedying a major utility deficiency discovered after purchase.
For buyers actively searching for well-specified properties in Nairobi’s residential market, our listings for 2-bedroom apartments for sale in Nairobi, 3-bedroom apartments for sale in Kilimani, 2-bedroom apartments for sale in Westlands, and homes for sale in Nairobi Kenya feature current options across Nairobi’s most active residential markets, with property specifications that include utility details to help you compare options before scheduling viewings.
Conclusion
Utilities are not peripheral considerations in a property purchase — they are the operational backbone of the home you are committing millions of shillings to. In Kenya’s specific infrastructure context, where municipal supply reliability is variable and construction quality is inconsistent, the condition and adequacy of a property’s utility systems has a direct and measurable impact on the quality of life the property delivers and on its value as an asset.
The inspection framework in this guide covers every utility system that matters in a Kenyan residential property, from the borehole licence and water quality test to the generator service record, from the RCD protection on the distribution board to the drainage test under combined load. Applying it systematically at every viewing, and bringing a professional engineer to confirm your findings for any property you are seriously considering, is the most reliable way to ensure that the home you buy delivers what it promises.
Utility problems are discoverable before you buy. After you buy, they are your problem to fix.
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