Roof, Structure and Rewiring on an Older Home Abroad: Real Repair Costs and How to Hire a Builder Without Getting Ripped Off

Published on: June 21, 2026

Quick answer: Some work on an older home abroad is optional and value-adding, but roof, structure and rewiring are the big, non-optional repairs you inherit rather than choose. They blow budgets, fail surveys and punish you hardest when handled badly from another country. Find them before you buy with a proper survey, get itemised costs from at least three registered builders, and protect yourself with the remote-owner playbook: written contracts in your language, staged payments tied to completed work, no full payment upfront, and a local professional supervising on your behalf. The repairs themselves are manageable; getting overcharged for work you cannot see is the avoidable part.

There are two kinds of work on an older home abroad. There's the optional, value-adding kind, a smarter kitchen, a better bathroom, which we cover in our renovations that add value guide. And there's the other kind: the big, non-optional repairs that you don't choose so much as inherit. A failing roof, a structural crack, wiring that's a fire risk. These are the repairs that blow budgets, fail surveys and, handled badly from another country, leave you overcharged for work you can't even inspect.

This guide covers what those repairs really cost, and, just as importantly, how to hire a builder you've never met, in a country you don't live in, without getting ripped off.

Roof: the repair that gets worse the longer you wait

The roof protects everything beneath it, so problems here cascade. A small leak becomes damp, rotten beams and ruined interiors if ignored.

Signs of trouble: slipped, cracked or missing tiles; sagging rooflines; water stains on upper ceilings; daylight visible in the loft; damp or rot in roof timbers; failed flashing around chimneys.

Repair vs replacement. Localised repairs, replacing tiles, fixing flashing, repointing a ridge, are relatively cheap. A full re-roof, including stripping the covering, repairing or replacing the timber structure beneath, and re-laying, is one of the larger jobs a house can need. On older properties, a survey often reveals that what looked like a patch job is actually a structure at the end of its life, which is exactly the kind of surprise you want to find before you buy (see our older-homes survey guide).

Structure: the one that needs an expert, fast

Structural problems are the most serious and the most variable, ranging from cosmetic cracks that need nothing, to subsidence or failing foundations that need major intervention.

Signs that warrant a structural engineer: new or widening cracks (especially diagonal ones, or cracks wider than a coin's edge); doors and windows that stick or won't close; sloping or bouncing floors; bulging walls; cracked or crumbling beams.

The critical move is diagnosis by a qualified structural engineer or surveyor, because the gap between "historic settlement, harmless" and "active subsidence, serious" is enormous in cost. Never guess at structure, and never let a builder both diagnose and quote for the fix without an independent assessment. That's a conflict of interest that inflates many bills.

Rewiring: the safety job buyers skip and regret

Old electrical systems are a quiet danger and a frequent reason older homes fail to satisfy insurers and buyers.

Signs an older home needs rewiring: an old fuse box rather than a modern consumer unit; cloth- or rubber-insulated wiring; too few sockets; lights that flicker; switches or outlets that are warm or scorched; no earthing.

A full rewire is disruptive and not cheap, but it matters on three fronts at once: safety (fire risk), insurability (insurers may refuse or load a policy on unsafe wiring, see our insurance guide), and saleability (a buyer's survey flagging dangerous wiring chips your price). Replumbing follows similar logic. Old, corroded or lead pipework is worth assessing and, where needed, replacing.

Real repair costs by country

Indicative 2025–2026 ranges. These swing enormously with property size, materials, access, region and the severity uncovered once work starts, so treat them as orientation, not a quote. Always get at least three written, itemised quotes.

Turkey generally sits below these European ranges on labour, with the consistent caveat that contracts, licensing and supervision matter more in markets where standards vary, which brings us to the part that actually protects your money.

How to hire a builder abroad without getting ripped off

The repair costs above assume the work is delivered honestly and competently. From another country, that's the real risk, not the price of materials, but paying a stranger for work you can't watch. Here's the playbook.

1. Get at least three written, itemised quotes

Never one. Three quotes tell you the real market rate and expose the outlier who's chancing it. Vague one-line quotes ("roof work, €12,000") are a red flag; insist on itemised breakdowns of labour, materials and timeline.

2. Verify the builder is legitimate and registered

Check they're a registered business, properly insured, and, where the trade requires it, licensed and certified. In Spain, for instance, significant work should be properly licensed and electrical work carried out by a certified installer who issues the correct certificate. Ask for references and, ideally, examples of completed local work.

3. Use a written contract, specific, in a language you understand

The contract should define the scope, the exact price, the payment schedule, the timeline, who supplies materials, what happens if costs change, and the guarantee. Get it translated if it's not in your language. A handshake deal abroad is a dispute waiting to happen.

4. Pay in stages tied to completed milestones, never the full amount up front

A reasonable deposit to start, then staged payments as defined phases are completed and verified, with a final retention held back until the job is finished and signed off. Never pay the whole sum upfront, and be wary of anyone who demands it. Full prepayment is the single most common way overseas owners get burned.

5. Appoint a local professional to supervise on your behalf

This is the most powerful protection for a remote owner. In Spain, an aparejador (quantity surveyor / works supervisor) or an architect can oversee the project, verify each stage before you release payment, and act as your independent eyes. Equivalents exist in other countries. The fee is small relative to the cost of unsupervised work going wrong.

6. Avoid cash-only deals

A builder who only wants cash and won't issue invoices offers you no paper trail, no VAT receipt, no warranty and no recourse. It can also create tax and legal exposure for you. Insist on proper invoicing.

7. Get the guarantee in writing, and check it's real

Reputable builders guarantee structural and major work. Make sure the guarantee is written, time-bound and backed by a business that will still exist if you need to call on it.

Red flags that should stop you

• Demands full payment upfront, or large cash-only payments.
• No written contract, no itemised quote, no invoices.
• Can't or won't show registration, insurance or references.
• A quote dramatically cheaper than the others (corners will be cut) or dramatically more expensive (you're being read as an out-of-towner).
• Pressure to "decide today" or skip the supervisor.
• Wants to both assess the problem and quote the fix with no independent diagnosis.

Frequently asked questions

How much does it cost to rewire an old house abroad?
As a 2025–2026 guide, roughly €3,000–€10,000-plus for a full rewire of a typical older home, depending on size and access. It's worth doing not just for safety but because unsafe wiring can make a property hard to insure and easy for a buyer to use as a reason to negotiate down the price.

What does a roof replacement cost?
Localised roof repairs often run €1,000–€6,000, while a full re-roof, including repairing or replacing the timber structure, typically starts around €6,000–€8,000 and rises well beyond that with size, materials and complexity. A survey before purchase often reveals which one you're really facing.

How do I find a trustworthy builder in Spain (or anywhere abroad)?
Get three itemised written quotes, verify the builder is registered, insured and (where required) licensed, sign a clear contract in a language you understand, pay in stages tied to completed work rather than upfront, and appoint a local supervisor such as an aparejador to verify each stage on your behalf. References from past local clients are gold.

Should I pay a builder upfront?
No. A modest deposit to begin is normal; full payment before work is done is the classic way remote owners get ripped off. Tie payments to verified milestones and hold a retention until the job is complete and signed off.

The bottom line

Roofs, structure and rewiring are the repairs you inherit rather than choose, non-optional, expensive, and the ones that punish you hardest when handled badly from afar. Find them before you buy with a proper survey, get itemised costs from at least three registered builders, and protect yourself with the remote-owner playbook: written contracts in your language, staged payments tied to completed work, no full payment upfront, and a local professional supervising on your behalf. The repairs themselves are manageable. Getting overcharged for work you can't see is the avoidable part, and avoiding it is mostly about process, not luck.

Buying or renovating an older property abroad? JanusHermes connects international buyers with verified local agents who can help you arrange surveys, vet builders and understand what major repairs really cost in that market.

This article is general information, not professional building, structural or legal advice. Always have specific work assessed and quoted by qualified, registered professionals in the relevant country.

A note on the numbers: where no source is named, the market figures in this article (prices, yields, costs) are indicative estimates compiled from publicly available market data and industry reporting at the time of writing. Markets move and rules change, so treat them as a starting point and verify current figures with official sources before acting on them.