Architect Fees on Mallorca 2026 — What an Architect Actually Costs

Building a villa on Mallorca means accepting that there’s a line item called “architect fees” in your budget. What surprises most international buyers is how much this varies — €30,000 here, €120,000 there, on what looks like a similar project. This article explains why, and what a realistic 2026 number looks like.

The COAIB framework

Architects in the Balearic Islands operate under the Colegio Oficial de Arquitectos de las Islas Baleares (COAIB). Membership is mandatory to sign architectural projects in Mallorca — the architect’s COAIB number appears on every drawing submitted for planning permission. (Our own number is 11-09822-22.)

COAIB publishes recommended fee scales (honorarios profesionales orientativos) that set out percentages of construction cost for different project types. These aren’t legally binding maximums or minimums, but they form the baseline most local architects use. For a single-family villa in 2026, the recommended fees sit at 8.5–11% of total construction cost for full-service (design + permits + construction supervision).

What “full service” means

The 8.5–11% figure covers a defined scope:

• Plot evaluation and feasibility (1–2% of total fee)
• Concept and preliminary design (15–20% of fee)
• Proyecto Básico — permit-grade documentation (20–25% of fee)
• Proyecto de Ejecución — construction-ready drawings (25–30% of fee)
• Construction supervision — Dirección de Obra (25–30% of fee)
• Final de Obra + hand-over (3–5% of fee)

If a quoted fee is meaningfully lower than the COAIB scale, ask which of these phases is excluded. The common cuts are construction supervision (you end up paying separately later, often more), and the Proyecto de Ejecución (which gets reduced to a thin “drawings pack” that the contractor then interprets — leading to expensive change orders).

What “luxury” or “international architect” markups buy

Some Mallorca-based architecture practices charge 14–18% of construction cost. This isn’t necessarily over-pricing — it can reflect more time on each project (smaller portfolio per architect), more rigorous documentation, more design iteration, more elaborate visualisation, more time with the client. For very high-end projects (€3M+ construction cost, custom-everything), this can be money well spent.

What it should NOT reflect is simply “we work with international clients so we charge more”. The COAIB framework applies equally to Spanish and foreign clients.

Additional fees beyond the architect

The architect fee covers only architecture. A complete project also requires:

• Structural engineer — typically €5,000–€15,000 depending on complexity
• Geotechnical study — €1,500–€4,000 for a single-family villa
• Topographic survey — €600–€2,000 depending on plot size and access
• ECU fees (independent technical certifier) — 0.8–1.5% of construction cost
• Ayuntamiento permit fees — typically 2.5–4% of construction cost, varies by municipality
• ICIO tax — Impuesto sobre Construcciones, around 2.5–4% of construction cost
• Aparejador / quantity surveyor — if separate from architect, around 30–40% of architect fee

Add these together and the soft-cost layer above the construction budget is typically 15–22% of the construction cost.

A realistic worked example (2026 prices)

A 300 m² modern villa with pool on a Sa Torre plot, mid-premium finishes, no major site complications:

This is what “building a 300 m² villa on Mallorca” looks like in real 2026 numbers, and why “rough estimates” of €800,000 you’ll sometimes hear quoted are usually missing several entire categories of cost.

Get an honest quote

If you’re evaluating a project and you’d like a transparent, COAIB-compliant fee proposal — contact us. We send full breakdowns, not glossy summaries.