Open-Book Construction Contract in Puglia: Where Your Money Actually Goes

Last spring I sat across from a German family in a quiet bar in San Vito dei Normanni. They had three turnkey quotes for the same villa - same plot, same plan, same finish schedule. The quotes varied by EUR 180,000. None of the three contractors could explain the difference, because the explanation was the variation in supplier markup they were not willing to show. By the time we had finished our coffee they understood what they actually needed: not a fourth quote, but a different contract structure. They needed an open-book construction contract.

I am Silvia. I am Italian, I grew up in Puglia, and together with my husband Giampiero we founded Borgomadre - a small advisory that helps foreign families build their villa here, in partnership with my father's practice, Studio Pagliara. My father Francesco is the engineer and architect on the Italian Albo who actually signs the structural and planning documents. He is the reason I can write a post this technical: most of the operational detail below is his.

Written with Francesco Pagliara, Studio Pagliara - engineer and architect on the Italian Albo.

This guide is for foreign owners - UK, US, German, French, Dutch - about to commission a EUR 500k to EUR 1.5M villa build in Puglia, who have either received conflicting quotes or are wondering how to run the project without flying to Italy every fortnight. The single most impactful decision you will make is not the price. It is the contract structure. Get that right and the EUR 180,000 gap disappears.

What an open-book construction contract actually means

In practical terms: every supplier invoice is visible to you, the owner. Stonework, steel, electrical, plumbing, kitchen, pool - every line item the contractor pays out is documented and shared with you, typically weekly. The project manager's fee is a fixed percentage of the actual construction cost. At Borgomadre we work at 15%, the upper end of the Italian norm (the band is 12 to 15%). That fee is the contractor's entire margin. There is no hidden markup on materials, no secret rebate from the regional supplier. The structure is a contratto a misura - measured against actual cost, not a lump sum.

Compare that with traditional turnkey - contratto a corpo in Italian, Schlusselfertig in German, forfait in French, sleutelklaar in Dutch. The contractor names one number, you sign, and what happens between supplier invoice and your final figure is the contractor's business. If they source the bathroom fixtures at EUR 12,000 and bill them to you at EUR 20,000, that EUR 8,000 difference is their margin - invisible and uncontested.

Both structures are legal. Both are common. The difference is who carries the information.

Why this matters more for foreign owners

The reason an open-book construction contract matters more for foreigners than for Italians is simple: you have no relationships to leverage. An Italian owner from Brindisi knows the stonecutter, knows the steel yard, knows who is giving a fair price this quarter. You do not. You cannot be on-site weekly. You cannot walk into the kitchen showroom and recognise that the same units sell at the next showroom for thirty per cent less. Italian supplier markup is not standardised - depending on the contractor's relationship with the supplier, the same kitchen install can land at a 30% margin or an 80% margin. With turnkey, you never know which one applies.

Open book makes the markup visible because there is no marketplace markup beyond the PM fee. The supplier invoices Borgomadre, Borgomadre shows you the invoice, you pay the supplier at cost. The 15% fee is the entire margin.

Three real examples from the last eighteen months. A Belgian client spotted a 60% markup on a kitchen install quoted under his previous (non-Borgomadre) contractor - open-book reconciliation surfaced it and saved him EUR 40,000. A UK couple discovered that a contractor calling himself "open book" was quietly inflating the structural steel cost by 25% by routing the invoice through a related party - the absence of a stato di avanzamento lavori (work-in-progress reconciliation) made it possible, and the lesson cost them EUR 30,000. A Swiss family commissioning a stone facade benefited from our fifteen-year relationship with a Cisternino stonecutter; the open-book invoice came in EUR 35,000 below the regional benchmark because there was no margin layered on top.

The Borgomadre 15% open-book model

What the 15% fee includes: every supplier invoice shared with you weekly; Francesco's weekly site visit and signed monthly progress report; competitive bid review for every line item above EUR 5,000 (we ask three suppliers, you see all three quotes); active leverage with regional suppliers we have worked with for fifteen years; coordination with the comune on the building permit and the eventual agibilita (habitability) filing.

What it does not include: the actual construction cost itself. That is what makes it open book. A 150 m² villa in Puglia in 2026 averages EUR 3,000 to 3,500 per square metre of construction cost - call it EUR 500,000 for round numbers. Our fee at 15% is EUR 75,000. Total to you: EUR 575,000, with every invoice documented.

Compare that with a turnkey contractor naming EUR 620,000. The contractor pays EUR 500,000 in true costs, absorbs EUR 120,000 as undocumented margin, and you pay EUR 45,000 more than the open-book equivalent - for less information. Turnkey looks simpler. It is not cheaper.

How to negotiate open book with any Italian contractor

If you have already committed to a contractor we do not work with, you can still ask them to convert the structure. Four clauses to insist on:

1. All supplier invoices (fatture fornitori) shall be available to the owner on written request within seven days.

2. The contractor's compensation shall be a fixed percentage of actual documented construction cost - name the percentage (12 to 15% is the regional norm).

3. Any supplier change or substitution above EUR 2,000 requires prior written owner approval.

4. End-of-month reconciliation as a stato di avanzamento lavori signed by both parties.

Three Italian phrases worth memorising before the meeting:

• Contratto a misura - open book / measured contract.

• Contratto a corpo - lump-sum / turnkey.

• Stato di avanzamento lavori - work-in-progress reconciliation, the document that makes open book actually work.

If the contractor refuses all four clauses, walk away. A contractor unwilling to show invoices for a build you are paying for has a reason for the refusal, and that reason will cost you more than finding a different contractor.

When turnkey is the right call

I want to be honest - open book is not universally better. Three situations where turnkey is the right structure:

• Projects below EUR 150,000. The overhead of weekly invoice review outweighs the savings.

• Investor projects where the owner genuinely does not care about the breakdown - only the final number and the rental yield matter.

• Where the turnkey contractor is exceptionally reputable and priced demonstrably below the open-book equivalent. Rare, but it happens - usually a contractor finishing their year and absorbing fixed-cost coverage by taking your project at thin margin.

For a foreign owner building a EUR 500k to EUR 1.5M villa to live in or rent at the luxury tier, none of these three usually applies.

Real-cost benchmarks for a 150 m² Puglia villa, 2026

These ranges are what a fair set of supplier invoices should land in for a 150 m² villa with a pool and a modest garden, Puglia 2026. Use them to sanity-check any quote - open book or turnkey.

• Facade stonework (local Apricena or Trani stone): EUR 15,000 to 25,000 (a floor, not a ceiling - heavy chianche detailing runs higher).

• Structural steel: EUR 18,000 to 25,000 for a single-storey villa with modest spans.

• Internal flooring: EUR 20,000 to 35,000 (chianche hand-cut limestone at the upper end).

• Bathroom fixtures (three bathrooms, mid-luxury): EUR 15,000 to 25,000.

• Kitchen (one full, design-led): EUR 15,000 to 40,000 - and higher again if you go Bulthaup or Boffi tier.

• Exterior pool with technical room: EUR 40,000 to 80,000 - an infinity edge pushes well past EUR 100,000.

• Olive-grove restoration (typical for villa plots): EUR 10,000 to 20,000.

These are deliberately conservative - sized to what you would actually verify if you called three suppliers yourself. The Italian-relationship discount we secure on stonework and pools often lands these EUR 5,000 to 15,000 lower, but I would rather you start from a fair benchmark and treat extra savings as a bonus.

How Borgomadre helps

If you are holding three turnkey quotes and do not understand the gap, book a thirty-minute Phase 1 feasibility call with me - we will read the quotes together and tell you whether open-book construction contract terms would close the gap or just confirm that one quote is already fair. Reach me on the contacts page, or read the full 7-step guide to building a villa in Puglia as a foreigner first if you want the wider picture - its Step 6 covers open book briefly; this post is the technical version.

If you are earlier in the process and still wondering whether to buy or build, see buying property versus building your dream villa in Puglia. And if you would like Studio Pagliara as your engineer and Borgomadre as your project manager, our RE services page is the place to start - or message me directly on WhatsApp to talk through your specific quotes.

Frequently asked questions

Is an open-book construction contract legal in Italy?

Yes. A contratto a misura (measured contract) is a recognised contract type under Italian law, alongside the contratto a corpo (lump-sum). Both are routinely used in private construction. The difference is documentary: open book requires the contractor to share supplier invoices, lump-sum does not.

What percentage PM fee should I expect for an open-book villa build in Puglia?

12 to 15% of actual construction cost is the regional norm. Borgomadre's fee is 15%, reflecting weekly on-site supervision by an Albo-registered engineer, weekly invoice review, and competitive bidding above EUR 5,000. Lower percentages usually mean less hands-on supervision - which costs you elsewhere.

Can I just be on-site weekly and make open book unnecessary?

In theory, yes. In practice, foreign owners who try this end up flying to Puglia every two or three weeks, missing key supplier decisions, and still relying on a translator for the technical conversations. Open book gives you the documentation without the flights.

What is the difference between open book and "cost plus"?

They are close cousins. "Cost plus" is the American term; a contratto a misura with a fixed-percentage PM fee is the Italian implementation of the same idea. Both share the principle: actual cost is documented, the contractor's margin is a transparent fee.

How do I check that the supplier invoices I am shown are real and not inflated?

Three controls. One: insist on the supplier's VAT number on every invoice - you can verify it on the Agenzia delle Entrate website. Two: at random, call a supplier directly (your PM should facilitate this) to confirm the invoiced amount. Three: the stato di avanzamento lavori should reconcile to the bank-transfer record.

Will an Italian contractor refuse to work open book?

Some will. The ones who refuse are usually the ones with the most to hide. Reputable contractors with healthy operations are comfortable with open book, because their margin does not depend on supplier markup. If a contractor refuses all four open-book clauses, that refusal is itself information.