Setting contingency and sequencing for a €198,000 Dublin studio renovation

T

TrueSignal

Homeowner
I have sketched out a €198,000 budget for renovating a 160 m² Dublin studio, but I still cannot tell how much of the risk is visible before work starts. The planned items include the kitchen, bathrooms, floors, decoration, electrical review and moderate energy improvements. There is no extension in the plan, though hidden defects could still lead to structural work.

My main uncertainty is access to services and any history of leaks or damp. If wiring and pipework are accessible and the moisture checks are clear, a standard contingency may be enough. If either is concealed or signs of water appear, I would want a larger reserve and a different sequence before committing to finishes.

Which survey findings would move you from the first approach to the second, and how should contractors separate fixed scope, provisional allowances and exclusions?
 
I’d initially model a 15% contingency and make sure more cash is accessible if services are concealed or there are moisture signs. Ask contractors to separate known work, provisional allowances and exclusions. A single all-in figure can hide which risks they have actually priced.
 
What kind of access is available to pipework and wiring? Also, is there any evidence of previous leaks or damp? Those answers matter more than floor area when deciding whether 15% is comfortable or optimistic.
 
I’m not convinced a larger contingency solves a loosely defined scope. Before tendering, identify where selective opening-up is possible and have the surveyor record visible moisture, floor condition and service routes. Money reserved for surprises is useful, but fewer surprises is better.
 
“Electrical checks” needs unpacking. Ask what happens if testing identifies defects: is remedial work included, separately scheduled or excluded entirely? Also confirm whether the kitchen and energy upgrades create additional electrical requirements. Otherwise the check may be priced while all resulting work sits outside the quote.
 
Plumbing access could dictate the whole programme. Get each bidder to explain how bathrooms and kitchen will be isolated, opened and reinstated, including who repairs floors or walls after access. Those small interface gaps are where trades often assume somebody else has allowed for the work.
 
The distinction between contingency and an undefined scope is helpful. I’ll ask for quotes to show firm items, provisional amounts and exclusions separately, and for electrical remedial work to be treated explicitly rather than hidden behind “checks.”

Would you investigate moisture before finalising the energy-upgrade specification, or can those two strands reasonably proceed together?
 
Investigate moisture first, then coordinate the findings with the energy plan. Adding insulation or changing ventilation without understanding why an area is damp can complicate diagnosis. The useful questions are where moisture is entering, whether it is historic or active, and what must dry before finishes are applied.
 
They can proceed in parallel at design stage, but I would not lock the specification or order materials until the moisture findings are understood. Ask who owns that coordination. If the surveyor, energy adviser and contractor each assume another person will reconcile the details, the programme will drift.
 
Material lead times also belong in the sequence, not just the purchasing list. Have the contractor identify which kitchen, bathroom, flooring and energy-upgrade items must be selected early, plus acceptable alternatives. Avoid starting demolition merely because the site team is available if critical replacements have no confirmed arrival window.
 
One caveat on opening-up: permission and responsibility may depend on the building and the area being disturbed. Before authorising invasive investigation, confirm what approvals are needed and whether any planned work affects shared fabric or services. Dublin timing is project-specific, so ask whoever is handling design and permissions to map that path early.
 
Following Mohammed’s point, request a simple responsibility schedule. It should name who obtains any required approvals, disconnects services, protects retained areas, removes waste, makes good after investigations and signs off completed systems. This exposes exclusions much faster than asking whether the quote is “complete.”
 
I’d also challenge the phrase “no structural extension.” It does not necessarily mean no structural work. New openings, heavy fittings or discoveries beneath floors could still require assessment. Ask the surveyor to flag anything in the proposed layout that might affect structure, rather than limiting the question to extensions.
 
For contingency, I’d keep two views: the percentage reserve and a short risk list with possible responses. If moisture, electrical remediation and inaccessible plumbing could all occur together, a nominal percentage may give false comfort. Update the reserve after investigation and again when exclusions come back with the tenders.
 
Make the programme show decision dates as well as construction dates. Moisture findings, any permit or consent route, contractor clarifications and long-lead selections should each have an owner and deadline. That will reveal whether the proposed start date is real or just the first day someone can attend.
 
A practical tender return could therefore include five attachments: priced scope, exclusions, provisional amounts, programme with lead times, and responsibility schedule. Compare those before comparing headline totals. The cheapest-looking bid may simply leave electrical remediation, access reinstatement or approval delays with the owner.
 
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