Architects, Engineers & Quantity Surveyors: Who You Need & What They Charge

TL;DR: For a Lagos house build, you need at minimum a registered architect (design and approvals), a structural engineer (the building's skeleton — designed from your soil test), and ideally a quantity surveyor (the bill of quantities that keeps your builder honest). On the federal scale of fees, architects charge roughly 4.75% of construction cost sliding downward as cost rises, structural engineers around 3% sliding, and QSs around 2.75% sliding — all negotiable in private practice. Skipping them doesn't save money; it moves the cost into variations, overpricing, and structural risk.

The cast, in order of appearance

The Architect

Your first professional. The architect:

• Designs the building (floor plans, elevations, how it lives and looks)
• Prepares and signs the architectural drawings for LASPPPA planning approval — only registered architects can stamp these
• Often acts as prime consultant, coordinating the other disciplines
• Can supervise or certify stages during construction if engaged for it

Fee: on the Federal Ministry of Works scale, the architect's fee starts around 4.75% of construction cost on the first tranche and slides down (4.5%, 4.25%, 4%...) as project cost rises. In Lagos private practice for residential work, fees are negotiated — sometimes a fixed sum for drawings only, sometimes a percentage for full services (design + approval processing + supervision). Be explicit about which service you're buying; "architect paid" has started many arguments.

The Structural Engineer

Designs everything that holds the building up: foundation (from your soil test report), columns, beams, slabs, staircase. Signs and seals the structural drawings approvals require for storey buildings. On waterlogged Lekki land, this person's raft-or-pile judgement is the most consequential decision in your project.

Fee: around 3.0% on the first tranche of the federal scale, sliding down (2.5%, 2.25%...). Civil/structural consultants on smaller residential jobs often quote fixed fees per design — negotiate scope: calculations + drawings + stage inspection visits are different products.

Mechanical & Electrical Engineers

For larger homes and any multi-storey development: water, drainage, power distribution, and services drawings for approval, plus installation standards. Federal scale: roughly 1.95% each on early tranches, sliding down. Many small residential builds handle services via experienced subcontractors under the architect's coordination — acceptable for a bungalow, riskier as complexity grows.

The Quantity Surveyor (QS)

The professional most first-time builders skip and most experienced builders never skip. The QS:

• Prices your design into a bill of quantities — every material and labour item, measured and priced. This is the document you tender to builders and measure payments against.
• Values stage work for payment certificates
• Prices variations before you approve them (the variation is where builders make their second margin)
• Produces the final account

Fee: around 2.75% on the first tranche where an architect/engineer is prime consultant, sliding down to under 1% at large values. On a ₦30M bungalow, the QS's fee buys you competitive builder quotes and payment control — most clients recover it in the tender spread alone.

Also on call

• Surveyor — your registered survey plan and setting-out beacons
• Geotechnical engineer/firm — the soil test (₦180k–₦900k class for residential)
• Builder/contractor — executes; should be a registered builder for formal projects, and is LASBCA-relevant for stage documentation
• Project manager (optional) — on the federal scale, ~1% sliding; worth it for diaspora clients and larger builds

How fees are usually structured

Three models in Lagos practice:

1. Percentage of construction cost (the scale model) — staged: commonly 25% on design/approval milestone, 50% through construction stages, 25% on completion, per the official stage-payment pattern.
2. Fixed fee per deliverable — drawings package, BOQ, per-visit supervision. Clean for small projects; define deliverables precisely.
3. Hybrid — fixed for design, percentage or per-visit for supervision.

Whatever the model: get the scope, deliverables, and payment triggers in a signed letter of engagement. Verify registration — ARCON (architects), COREN (engineers), and the QS professional bodies exist precisely so you can check the person stamping your structural design is who he claims.

The cost of skipping them

• No stamped drawings → no lawful approval → LASBCA exposure.
• No structural design from soil data → foundation by guesswork (see every cracked duplex in Lekki).
• No BOQ → builder's "lump sum" pricing, unverifiable variations, and stage payments decided by vibes.
• The total professional bill on a house typically runs in the high single digits to ~10% of construction cost across all disciplines. The failure modes they prevent cost multiples of that.

Frequently asked questions

How much does an architect charge in Nigeria?

On the federal scale, roughly 4.75% of construction cost on the first tranche, sliding down as cost increases; QSs around 2.75% sliding, structural engineers around 3% sliding. Private Lagos residential fees are negotiated — fixed-fee drawings packages are common for houses.

Do I legally need an architect to build a house in Lagos?

Yes for approval: architectural drawings must be prepared, signed and sealed by a registered architect, and structural drawings by a registered engineer for storey buildings. Building approval (LASPPPA) and LASBCA stage certification run on these documents.

What does a quantity surveyor do and is it worth it?

A QS produces the bill of quantities, runs tender comparisons, values stage payments, and prices variations. On most builds the tender spread and variation control recover the fee. For diaspora builders, the QS is close to non-negotiable.

Who designs my foundation?

Your structural engineer, working from the geotechnical (soil test) report. On waterlogged Lekki land that design decision — raft vs pile — is the project's most important cost and safety call.

Can my builder replace these professionals?

A builder executes designs; he doesn't stamp approvals or certify his own work independently. Using the builder as designer, QS, and supervisor removes every check in the system.

Related reading

• Building Approvals in Lagos: LASBCA Permits Step by Step
• Building from Abroad: Monitoring Your Project Without Wahala
• How to Chart a Survey Plan at the Surveyor General's Office
• New Developments for Sale in Lekki Phase 1 (2026): Prices & Payment Plans