In brief
- Adding floors to an existing Hargeisa building transfers new loads into foundations and columns whose capacity is unknown until someone opens up and tests the structure.
- A contractor who has only built new single-storey work may not have ever assessed an existing frame, so the gap hides in the method statement, not the price.
- Ask for the structural review as a separate deliverable with calculations, test results and a named engineer before any extension work starts.
Contents
Adding a floor or two to an existing building in Hargeisa starts with a question most project teams skip: what can the present structure actually carry? Extension experience gaps in Hargeisa appear when the people pricing and building the vertical extension have never assessed an existing frame, so the new loads go onto columns, footings and connections that nobody has checked.
What makes a vertical extension different from new build?
An extension loads an existing structure, so the design starts with assessment rather than a blank sheet. The original drawings may not exist, the concrete strength is unknown, and the foundations were sized for the original height only. General practice is to expose a footing, take cores or rebound readings from columns, and check rebar size and cover against what the drawings claim. Surface carbonation of exposed concrete can reduce cover effectiveness wherever it occurs, so confirm the condition of the existing concrete on site rather than assuming it. Ask the municipal engineer's office whether it holds any approved drawings for the plot, and treat whatever it provides as a starting point, not proof. Where records are missing, the assessment has to come from the building itself.
Where does the experience gap show up?
It shows up in the method statement, because an assessment is a set of steps that either exist or do not. A team with new-build experience only will price plaster, blockwork and formwork, and leave out concrete testing, rebar scanning, footing exposure and a load path check from the new slab down to the soil. Read the proposed programme and look for those items. If the scope describes only the new floor, the gap is open. Listen for sentences like "the columns look strong enough" without a measurement behind them. Ask which laboratory will test cores and who will sign the structural calculations. Confirm the engineer's design follows the project specification, not a remembered rule of thumb. Check what the contract allows with your own advisers before signing, and set out the assessment and testing as separate items if they agree to it.
How do you close the gap before work starts?
Split the job into assessment and construction, and make the assessment a paid, standalone deliverable. The client or supervisor should receive a written structural review: measured column and footing dimensions, test results for concrete strength, a rebar check, and calculations showing the existing frame and soil can carry the added floors. Ask the engineer to state assumptions about imposed loads and soil bearing pressure in writing, because those are the numbers the whole extension rests on. Walk a recent extension the same team completed, and ask how they verified the existing frame there. If they cannot show test records, treat the reference as unproven. Confirm any permit requirement with the municipal engineer's office before work begins, and keep the signed review on site.
What to do next
Before signing, ask the contractor and engineer for one document: a structural review of the existing building, with concrete test results, footing and column measurements, and calculations for the added load. If they cannot produce it, hire a separate engineer to prepare it and price the assessment as its own item in the contract. Then check the permit position with the municipal engineer's office in Hargeisa.
Frequently asked questions
Can a contractor who only builds new houses handle a Hargeisa extension?
New-build experience does not cover assessing an existing frame. Ask for test records and calculations from a previous extension, and if those do not exist, keep the structural review as a separate contract with an engineer who has done one.
What should a structural review of an existing Hargeisa building include?
Measured footing and column dimensions, concrete strength test results, a rebar size and cover check, and calculations showing the existing frame and soil can carry the new floors, with the assumed loads written down.
Where do I check whether an extension needs approval in Hargeisa?
Ask the municipal engineer's office what drawings and permits it requires for adding floors to an existing building. Ask for the answer in writing before work starts.
Local reporting: this article is written for building work in Hargeisa and Somaliland. Ground conditions, prices and rules differ between places; confirm the details for your own site.