# Office Construction Cost Planning: Ongata Rongai, Kenya > Ongata Rongai office cost planning using the World Bank ICP 2021 national construction price-level index of 64.9, plus a GeoNames-based local comparable-search shortlist. - Canonical: https://harth.build/resources/construction-costs/office-construction-cost-ongata-rongai-ke/ - Last updated: 2026-09-15 - Data source: National screening observation from the [World Bank ICP 2021 API](https://api.worldbank.org/v2/sources/90/country/KEN/classification/PX.WL/series/1501200/time/YR2021/data?format=json) and [ICP data documentation](https://www.worldbank.org/en/programs/icp/data); locality and population from the [GeoNames KE dump](https://download.geonames.org/export/dump/KE.zip) (CC BY 4.0 snapshot 2026-08-26, GeoNames ID 189723). The PLI is not a city cost/m² rate, current escalation series or tender estimate. ## Key facts | Fact | Value | | --- | --- | | National construction PLI | 64.9 (World Bank ICP 2021; World = 100) | | Screening ratio to world | 0.649 (dimensionless PLI ÷ 100; not a city location factor) | | Locality reference | -1.3953, 36.7640 (GeoNames ID 189723) | | Snapshot population | 172,569 (15 of 50 listed Kenya places) | | Nearest listed peer | Lang'ata · 5 km (great-circle distance between GeoNames reference points) | | Estimate currency | KES (obtain a current local rate and named base date) | ## Direct answer For early office construction cost planning in Ongata Rongai, the World Bank ICP reports a 2021 Kenya construction price-level index of 64.9, with the world equal to 100. This is a national comparison—not a Ongata Rongai KES/m² rate or tender estimate—so replace it with current local evidence before budgeting or procurement. The observation covers construction across Kenya in 2021; it does not measure a Ongata Rongai market basket or current office tenders. GeoNames 189723 records the locality at -1.3953, 36.7640, with snapshot population 172,569. That ranks Ongata Rongai 15 of 50 listed places, while Lang'ata is the nearest listed peer at about 5 km. Use these facts only to plan the comparable search. Obtain current local rates on a consistent area basis, then reconcile scope, taxes, fees, contingency and escalation. Retain the source, base date and reviewer when local evidence replaces the screening ratio. *Content and cited inputs reviewed by [Scott Barrington](https://nz.linkedin.com/in/barrington), Harth founder and architectural technology specialist · Published 2026-08-26 · Updated 2026-09-15.* ## What does the 64.9 construction index mean? The World Bank ICP 2021 construction PLI for **Kenya is 64.9**, compared with a world benchmark of 100. It is a national spatial price comparison assembled for the 2021 reference year. It does not say that office work in Ongata Rongai costs 0.649 times a current world rate. ## Which Ongata Rongai inputs are known? The reproducible locality point is **-1.3953, 36.7640** (GeoNames 189723). Its snapshot population is **172,569**, ranked 15 of 50 listed places; GeoNames classifies it as a populated place in administrative area 19. These facts shape the local comparable search, not the price. ## What must a project estimate add? For a Ongata Rongai office project, reconcile workplace fit-out grade, services density, floorplate efficiency and vertical transport. Use a consistent gross-floor-area basis and record the following before reliance. | Estimate field | Screening record | Project requirement | | --- | --- | --- | | National context | ICP 2021 PLI 64.9 | Retain only as dated cross-country context | | Local KES/m² rate | Not supplied | Current comparable with named source and base date | | Area and scope | Gross floor area; scope unresolved | Measurement standard, specification and procurement route | | Additions | Not supplied | Taxes, fees, site work, contingency and escalation | | Review | Automated source and arithmetic QA | Qualified local cost review | ## Ongata Rongai comparable-location search screen This shortlist is computed from the checked GeoNames snapshot. Distance and population help prioritize where to request comparables; neither is used as a cost multiplier. | Listed place | Great-circle km from Ongata Rongai | Snapshot population | Admin area | | --- | ---: | ---: | --- | | Lang'ata | 5 | 172,569 | 05 | | Kiserian | 9 | 76,903 | 19 | | Ngong | 11 | 102,323 | 19 | | Nairobi | 14 | 4,397,073 | 05 | | Mlolongo | 20 | 136,351 | 31 | | Mwala | 77 | 181,896 | 31 | | Jomvu | 428 | 163,415 | 37 | | Garissa | 337 | 163,399 | 16 | ## Price-level normalization worksheet For a validated reference rate **R** from a country with construction PLI **P**, the transparent screening calculation is **R × (64.9 ÷ P)**. At P = 100 the dimensionless ratio is 0.649; no world cost rate is asserted. Keep the reference rate's currency, base date, area basis and scope attached. | Input | Recorded value | Release condition | | --- | --- | --- | | Target national PLI | 64.9 (World = 100, 2021) | Screening context only | | Reference construction PLI P | User-supplied from the same ICP classification/year | Must match reference rate country | | Validated reference rate R | User-supplied | Named source, currency, date, area and scope | | Local Ongata Rongai adjustment | Not asserted | Replace with current local comparable evidence | | Result status | Screening normalization | Not a budget, quote or tender estimate | ## Where can you explore related guidance? - [Explore all construction costs guidance](https://harth.build/resources/construction-costs.md) - [House Construction Cost Planning: Ongata Rongai, Kenya](https://harth.build/resources/construction-costs/house-construction-cost-ongata-rongai-ke.md) - [School Construction Cost Planning: Ongata Rongai, Kenya](https://harth.build/resources/construction-costs/school-construction-cost-ongata-rongai-ke.md) - [Retail Construction Cost Planning: Ongata Rongai, Kenya](https://harth.build/resources/construction-costs/retail-construction-cost-ongata-rongai-ke.md) - [Office Construction Cost Planning: Lang'ata, Kenya](https://harth.build/resources/construction-costs/office-construction-cost-lang-ata-ke.md) - [All construction costs guidance for Kenya](https://harth.build/resources/construction-costs/kenya.md) - [Daylight & Orientation: Ongata Rongai, Kenya](https://harth.build/resources/solar-data/daylight-orientation-ongata-rongai-ke.md) - [Solar Altitude & Azimuth: Ongata Rongai, Kenya](https://harth.build/resources/solar-data/solar-altitude-azimuth-ongata-rongai-ke.md) - [Solar Shading Design: Ongata Rongai, Kenya](https://harth.build/resources/solar-data/solar-shading-design-ongata-rongai-ke.md) - [Sun Path: Ongata Rongai, Kenya](https://harth.build/resources/solar-data/sun-path-ongata-rongai-ke.md) ## Sources and method National screening observation from the [World Bank ICP 2021 API](https://api.worldbank.org/v2/sources/90/country/KEN/classification/PX.WL/series/1501200/time/YR2021/data?format=json) and [ICP data documentation](https://www.worldbank.org/en/programs/icp/data); locality and population from the [GeoNames KE dump](https://download.geonames.org/export/dump/KE.zip) (CC BY 4.0 snapshot 2026-08-26, GeoNames ID 189723). The PLI is not a city cost/m² rate, current escalation series or tender estimate. ### Source links - [api.worldbank.org](https://api.worldbank.org/v2/sources/90/country/KEN/classification/PX.WL/series/1501200/time/YR2021/data?format=json) - [worldbank.org](https://www.worldbank.org/en/programs/icp/data) - [download.geonames.org](https://download.geonames.org/export/dump/KE.zip) ## Frequently asked questions ### Does the 64.9 index give a office cost per m² for Ongata Rongai? No. 64.9 is the World Bank ICP 2021 national construction price-level index for Kenya, with the world equal to 100. It is a cross-country screening statistic, not a Ongata Rongai KES/m² rate, escalation index, quote or tender estimate. ### How should a Ongata Rongai office estimate replace this screening benchmark? Collect current Ongata Rongai comparables on a consistent gross-floor-area basis, reconcile workplace fit-out grade, services density, floorplate efficiency and vertical transport, and state base date, currency, taxes, fees, site work, contingency and escalation. A qualified local cost professional should review the resulting project estimate. --- - Continue in Harth (open this topic in the Harth agent): https://app.harth.build/agent?context=%2Fresources%2Fconstruction-costs%2Foffice-construction-cost-ongata-rongai-ke%2F - View this page in a browser: https://harth.build/resources/construction-costs/office-construction-cost-ongata-rongai-ke/ - All resources for agents: https://harth.build/llms.txt