John Callaghan MIEI AMEI Civil Engineer & Surveyor

John Callaghan MIEI AMEI Civil Engineer & Surveyor Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from John Callaghan MIEI AMEI Civil Engineer & Surveyor, Surveyor, 10 The Cloisters Kells, Co Meath.

Civil Engineer (MIEI, AMEI)

Building pathology • Conservation & restoration • Sustainability & energy efficiency
Legal and regulatory compliance • Refurbishment, redevelopment & development projects

17/07/2026

One of the most important changes in the new planning regulations is the option, subject to detailed conditions, to divide an existing house into two self-contained homes without a full planning application.
This could be a genuinely strategic reform.
For an older homeowner living alone in a large family home, subdivision could create a dependable retirement income while allowing them to remain in their own community. It could also provide a separate apartment for an adult child, an older parent, or a carer who needs to live nearby.
It also tackles under-occupied housing. Instead of forcing people to sell or move, it allows unused space in existing homes to be converted into much-needed accommodation.
The Minister might have gone further. Not every suitable four-bedroom semi-detached house will fall within the exempted development rules.
But the wider policy signal is important.
By creating an exempted route for subdivision, the Government has now recognised that turning one suitable house into two homes can be a legitimate and sustainable form of housing delivery.
That matters even where planning permission is still required.
A well-designed proposal to divide a four-bedroom semi into two apartments should now be viewed against a much clearer national policy background: better use of existing housing stock, more compact growth, support for ageing in place, and additional homes without unnecessary greenfield development.
The benefits can include:
extra retirement income;
a home for a son or daughter;
accommodation for a carer or family member;
greater independence and privacy;
better use of existing roads, services and neighbourhoods; and
more homes without building new estates.
This is not a free-for-all. Fire safety, sound insulation, ventilation, drainage, access, energy performance, Building Regulations, legal title, mortgages and insurance must all be properly addressed.
There is also a sunset provision, so the measure should be treated as a practical, evidence-based housing experiment. The State should monitor how many homes are created, how they are occupied, and whether the reform helps reduce under-occupation and supports independent living.
The exemption itself is valuable. But the broader message may be even more important:
Ireland now accepts that splitting suitable existing homes into two apartments can be part of the solution to the housing crisis.
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🟦 CAN THE COUNCIL MAKE YOU REPLACE A SEPTIC TANK THAT HAS BEEN THERE FOR MORE THAN SEVEN YEARS?Suppose a replacement sep...
20/06/2026

🟦 CAN THE COUNCIL MAKE YOU REPLACE A SEPTIC TANK THAT HAS BEEN THERE FOR MORE THAN SEVEN YEARS?

Suppose a replacement septic tank was installed without planning permission more than seven years ago. It is working properly, is maintained, is not overflowing, is not creating odours and is not polluting a well, stream, groundwater or adjoining land.

Can the council simply order the homeowner to dig it up and install a new system?

The answer is: not automatically.

The seven-year planning rule

Where development was carried out without planning permission, ordinary planning enforcement is generally subject to a seven-year time limit running from the commencement of that development.

Therefore, where a septic tank and associated works were installed and brought into continuous use more than seven years ago, the council may ordinarily be out of time to pursue:

• a planning enforcement notice;

• a planning prosecution; or

• a court injunction under section 160 of the Planning and Development Act 2000.

The development does not become authorised or acquire retrospective planning permission. Its legal status is generally described as “unauthorised but immune from planning enforcement.”

The homeowner may still need convincing evidence of when the tank was installed and first used. Receipts, photographs, contractor records, dated maps, desludging records and witness evidence could become important.

Wastewater law is separate

The seven-year planning rule does not prevent the council from inspecting the system under the Water Services Act.

Every homeowner must ensure that a domestic wastewater treatment system:

• is properly maintained;

• complies with the applicable maintenance regulations;

• does not cause, and is not likely to cause, a risk to human health or the environment;

• does not create odour, noise or another nuisance; and

• is properly registered.

If an inspection establishes a breach of those requirements, the council may issue an advisory notice requiring remedial measures.

But the council should identify the actual defect, risk or regulatory breach. The mere facts that the tank is old, lacks planning permission or does not conform in every respect to standards applying to a brand-new installation do not automatically establish that it must be completely replaced.

Repair, improvement or full replacement?

The necessary response should depend on the problem found.

A proportionate remedy might involve:

• desludging or improved maintenance;

• repairing pipework or distribution boxes;

• preventing roof water from entering the system;

• repairing or extending a percolation area;

• reducing hydraulic loading;

• improving treatment; or

• replacing the system where lesser works cannot remove the identified risk.

EPA guidance expressly recognises that remediation of an existing septic tank may have regard to the current Code of Practice without necessarily being bound by every requirement applying to a completely new system.

The important distinction

A council cannot normally avoid the seven-year planning limitation by simply relabelling an old planning breach as an environmental matter.

It must establish a genuine basis under wastewater or environmental law—for example:

• actual pollution;

• a likely risk of pollution;

• a risk to human health;

• odour or nuisance;

• defective operation or maintenance; or

• breach of the domestic wastewater regulations.

A statement that the system “does not meet modern standards” should not, by itself, end the discussion. The council should explain:

What precise statutory requirement has been breached?
What inspection evidence supports that conclusion?
What pollution, nuisance or future risk has been identified?
Why is complete replacement necessary?
Could a less intrusive and less expensive remedial measure achieve compliance?
The practical answer

A septic tank that has existed and operated continuously for more than seven years may be outside ordinary planning enforcement.

However, it is not exempt from inspection or from continuing wastewater and pollution-control obligations.

Where the system is properly maintained and is neither causing nor likely to cause pollution, nuisance or danger to health, the council may have difficulty justifying a demand for complete replacement merely because the system is old or did not originally obtain planning permission.

Each case will ultimately depend on the installation history, the wording of any original planning permission, the inspection findings and the technical evidence.

Age alone is not proof of compliance—but age alone is not proof that a functioning septic tank must be replaced either.

Dampness in Irish Homes: The Critical Role of Relative Humidity 🌧️🏠One of the biggest challenges when buying or renovati...
18/06/2026

Dampness in Irish Homes: The Critical Role of Relative Humidity 🌧️🏠
One of the biggest challenges when buying or renovating old houses and cottages in Ireland is dampness — and Relative Humidity (RH) is at the heart of it.
What is Relative Humidity?
Relative Humidity is the amount of moisture in the air compared to the maximum it can hold at a given temperature, expressed as a percentage.

High RH = Air is moist → much easier for condensation and damp to occur.
Ireland’s mild, wet climate keeps both outdoor and indoor RH naturally high.

Typical Humidity Levels in Ireland

Outdoor RH: Often 75–95%, especially on the west coast (Kerry, Mayo, Galway, Donegal, West Cork).
Indoor RH in older homes during winter: Frequently 60–80%+ without good ventilation.

How High Relative Humidity Causes Dampness
When warm, moist indoor air meets colder surfaces (walls, windows, ceilings), the air cools and can no longer hold all its moisture. This leads to:

Condensation on windows and walls
Mould growth
Penetrating damp in solid walls
Musty smells and poor indoor air quality
Reduced effectiveness of any insulation you add

Real Examples at 20°C Indoor Temperature:

50% RH → Dew Point ≈ 9°C (lower risk)
60% RH → Dew Point ≈ 12°C (common problem area)
70% RH → Dew Point ≈ 14–15°C (high damp risk — very typical in Irish winters)

How to Fight Dampness Related to Humidity

Control moisture at source — Use extractor fans in kitchens and bathrooms.
Ventilate properly — Trickle vents, MVHR systems, or regular airing.
Insulate wisely — Raise internal surface temperatures so they stay above the dew point.
Monitor humidity — Aim to keep indoor RH between 40–60% (cheap hygrometers are very useful).
Breathable materials — Especially important in traditional cottages.

In Ireland’s damp climate, simply making a house airtight without managing humidity is one of the fastest ways to create new damp problems.
Have you struggled with high humidity or persistent damp in your home?
Which part of Ireland are you in?
Share your experiences below — I regularly help homeowners and renovators solve these exact issues.

Buying or Renovating an Old Irish Cottage? This High Court Case Could Save You Years of Heartache 🏡⚖️A major 2026 High C...
18/06/2026

Buying or Renovating an Old Irish Cottage? This High Court Case Could Save You Years of Heartache 🏡⚖️
A major 2026 High Court judgment has just clarified the rules around renovating derelict cottages — and it's essential reading if you're thinking of buying or restoring an old house.
Case Summary: James Ó Murthuile v. An Coimisiún Pleanála and Martin Flynn [2026] IEHC 36
The property: A tiny 30sqm cottage overlooking Lough Derg in Co. Tipperary.
After a 20-year planning battle involving refusals, withdrawals, and an enforcement notice, the High Court has now ruled in favour of the renovation.
Key Takeaways for Cottage Renovators:
✅ Residential use is hard to lose
Just because a cottage looks derelict doesn’t mean it has legally lost its status as a dwelling. The court confirmed that residential use is a “hardy beast” — it takes a lot more than poor repair to abandon it.
✅ Your Paper Trail Matters
Repeated planning applications (even withdrawn ones), surveys, and design work all help prove you never intended to abandon the property.
✅ Never used for another purpose
The fact the building was never turned into a shed or other non-residential use was crucial.
Important Technical Requirements:

Septic Tank — Must comply with the EPA Code of Practice + Certificate of Compliance.
Surface Water — Soak pits to BRE 365 standards.
Energy Efficiency (Part L 2022) — Major renovations (over 25% of the building) require upgrading insulation, heating, etc. to modern standards.
Protected Structures — Extra care needed if your cottage is protected.

The Big Lesson: Physical dereliction ≠ legal abandonment.
If you’re looking at an old cottage, don’t assume it’s too far gone. With the right approach and evidence, restoration is very achievable.
Have you bought or renovated an old cottage recently?
What challenges did you face with planning or Building Regulations? Drop a comment below 👇
I’m happy to answer questions or advise on planning, engineering, or low-carbon renovation strategies for historic buildings.

Before you install that new kitchen or wardrobe… think about what you’re sealing in.A lot of us are building super airti...
27/04/2026

Before you install that new kitchen or wardrobe… think about what you’re sealing in.
A lot of us are building super airtight, A-rated homes these days — great for energy bills, but we need to talk about VOCs (Volatile Organic Compounds), especially formaldehyde.
That “new house smell” isn’t always a good thing. It’s often chemical off-gassing from common materials.
Why it matters in modern fit-outs:

MDF & Chipboard cores — made with urea-formaldehyde resins that slowly release gas over time.
Factory lacquers & paints — acid-cured finishes can off-gas for months.
Adhesives & edge banding — they all add to the total VOC load.

Research shows indoor VOC levels can be 2–5 times higher (sometimes up to 10x) than outdoors. In a sealed room with new cabinets, formaldehyde can easily exceed safe levels if there’s poor ventilation.
EU/Ireland Standards (important update):

E1 — current legal minimum (~0.1 ppm).
E0 / E05 — much better (~0.05 ppm). From 6 August 2026, new EU rules will halve the legal limit to this stricter level.
NAF (No Added Formaldehyde) — the gold standard (uses alternative resins).

How to keep your indoor air cleaner:

Specify smarter boards — Ask for MEDITE Ecologique or MEDITE CLEAR (Irish-made, no added formaldehyde MDF) or birch plywood with low-VOC glues.
Ditch acid-cured lacquers — Go for water-based paints or oils instead.
Flush it out — Let new cabinets sit in a well-ventilated space for 2–4 weeks before install if possible (most heavy off-gassing happens in the first month).
Ventilate properly — In airtight homes, your MVHR or extraction fans are non-negotiable. Without good air exchange, those VOCs can linger for over a year.

Bottom line: Build tight… ventilate right… and choose low-emission materials. Your family (and clients) will feel the difference long after the project is finished.
Have you noticed the “new house smell” lingering in renovations? Or do you have favourite low-VOC products? Drop them in the comments — happy to answer questions or look at specific specs! 👇
References:
• EU REACH Formaldehyde Restriction – Commission Regulation (EU) 2023/1464 (effective 6 Aug 2026): eur-lex.europa.eu/eli/reg/2023/1464/oj
• EPA – Volatile Organic Compounds’ Impact on Indoor Air Quality: epa.gov/indoor-air-quality-iaq/volatile-organic-compounds-impact-indoor-air-quality

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10 The Cloisters Kells
Co Meath
A82C9Y7

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