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54 George's Street Lower
Dublin, County Dublin,

01 5585205

Award Wining Architects based in Monkstown, Co.Dublin and working in all surrounding counties.

Specialising in sensitive contemporary design for domestic extensions, renovations, new-build houses and interior design.  We also design and build custom joinery.

RIAI registered architects, project managers & interior designers

Dublin Architecture Blog

Hofler Architects Dublin  - Our Blog of our news and views.

Filtering by Tag: Cost

New Building Regulations energy rules for home renovations and extensions, 2019.

Paul Mulhern

“A follows D” - A recent major renovation and extension by Spacious Architects that brought an existing D rated house up to a BER A standard.

House owners planning to undertake major renovations or extensions will be required to ensure that the whole dwelling will meet the higher energy rating (BER) of B2 upon completion under new building regulations.

The new rules will come into effect from November 2019, and will also require all new homes to become nearly zero energy buildings (NZEB). That will require them to have a BER of A2, - twice as energy efficient as the current minimum required rating for new builds of A3.

Where more that 25 per cent of the surface of the building is undergoing renovation or an extension there will be a requirement that the whole building should achieve an energy efficiency of B2 or cost optimal level.

On November 1, amendments to Part L and Part F of the building regulations (relating to energy efficiency and ventilations) for new residential dwellings and dwellings getting major renovations come into effect. The Government said the rules will be subject to transition arrangements to allow flexibility to developers.

Requirements for major renovation of domestic buildings

For existing buildings, it is proposed that major renovation is typically activated under the following circumstances, where the work affects greater than 25% surface area of the existing dwelling:

  • External Wall Renovation, external or internal insulation

  • External Wall & Window Renovation

  • External Wall & Roof Renovation

  • External Wall & Floor Renovation

  • New Extension

The cost optimal level is a primary energy performance of less than 125 kWh/m2/yr (B2 BER) when calculated using DEAP or upgrade of roof insulation and heating system. The Cost Optimal Study was updated in 2018.

Painting, replastering, rendering, reslating, cavity wall insulation are not considered major renovation works.

Energy upgrade works to the house pictured above included:

Link: Irish Times article

Irish Times feature - As Green as a Period House can be.

SPACIOUS - Registered architects and designers

T: 01-5585205 | M: 089-2447264

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Building regulations for one-off homes and extensions rolled back

Paul Mulhern

Changes to the Building Control (Amendment) Regulations 2014, S.I. 9 of 2014

Hofler Architects - Domestic Extension Work Under Construction.

Hofler Architects - Domestic Extension Work Under Construction.

The Department of the Environment, Community and Local Government had been undertaking a review of the Building Control (Amendment) Regulations 2014 (S.I. No. 9 of 2014), to include an examination of the cost burden involved for one-off houses, including self-build, and extensions to existing dwellings.

The review of the regulations by the Minister was because of what he said were “outlandish charges” being sought for the inspections required under new system.

The review examined the first 12 months of the mandatory certification requirement, and Minister of State for Housing and Planning Paudie Coffey yesterday announced amendments to the regime:

He said the changes “remove the mandatory requirement for statutory certificates of compliance in respect of a new dwelling on a single unit development or a domestic extension”.

Owners including self-builders will in future be given the choice to opt out of statutory certification and are to be allowed instead to “demonstrate by alternative means that they have met their general obligation to build in accordance with the minimum requirements of the building regulations”.

Alternative means may include the opinions of building professionals, such as architects and inspections by local authorities.

To ensure that building standards do not slip, a local authority inspection process is to be introduced. Mr Coffey said the Department of Environment would engage with the local authorities to ensure they develop the inspection capacity “over time”.

Mr Coffey said there would be with definitive targets and timelines to ensure progressive improvement by local authorities in all sectors including inspections of single dwellings, multi-unit residential developments and commercial buildings.

The mandatory requirement for certification will remain in place for all multi-unit developments.

Mr Coffey said he was satisfied the new arrangements would “level the playing field for individuals and families planning to build or extend their own home” and that they would “no longer be held to ransom by excessive quotes for design and completion certificates”.

“Owners who wish to invest in statutory certification may of course continue to do so and I believe many will do so where reasonable and affordable prices can be obtained,” he said.

Contact SPACIOUS Dublin to discuss our arrangements for dealing with the evolving Building Regulations.

Independent News article - New rules will remove requirement for one-off homes to be inspected.


SPACIOUS Architects - Working throughout Dublin & beyond.   - Our Blog.

Hofler Architects have extensive experience in house extensions, refurbishments, sustainability, conservation of protected structures and  one-off new builds.  We are a highly experienced team of architects based in Monkstown, Co. Dublin. The practice was established in 1992 and offers a full range of architecture services for domestic works, conservation, housing & apartment developments, and many commercial sectors including bars, restaurants, offices, educational and retail.

"This is a great example of a meticulous period restoration - as green as a period house can be" - The Irish Times.



New Building Control Regulations to be loosened - for some.

Paul Mulhern

Our Building Control (Amendment) Regulations were only implemented in 2014. But now it seems that some government ministers want to roll back the standards for some buildings:

Review of Building Control (Amendment) Regulations 2014, S.I. 9 of 2014

Mr. Paudie Coffey, T.D., Minister of State at the Department of the Environment, Community and Local Government, together with Minister Alan Kelly, T.D., today announced a review of the Building Control (Amendment) Regulations 2014 (S.I. No. 9 of 2014), which will include an examination of the cost burden involved for one-off houses, including self-build, and extensions to existing dwellings.

The scope and objectives of the review are as follows:

(a) To review the operation of S.I. No. 9 of 2014 in consultation with industry and local authority stakeholders and members of the public,

(b) To consider in particular the impact of S.I. No. 9 of 2014 on single dwellings and extensions to existing dwellings having regard to specific concerns which have been raised in relation to the cost burden of the regulations and the level of certification required for this sector,

(c) To consider more generally the impact of S.I. No. 9 of 2014 on owners, occupiers and users of buildings have regard to the statutory purposes for which building regulations may be made (i.e. public safety, accessibility, energy efficiency, efficient use of resources and good building practice),

(d) To make recommendations that will strengthen and improve the arrangements in place for the control of building activity in keeping with the principles of good and fair administration,

(e) To report with recommendations to the Minister of State as soon as possible, but in any event no later than 30 June 2015.

Frank McDonald in the Irish Times comments:  "It’s important to remember the stated purpose of the amended building regulations introduced last year was to ensure there would be no repeat of the “widespread failures” during the boom years, for which Priory Hall became the metaphor.  

As the consultation paper notes, “common failures” associated with “stand-alone dwellings” include inadequate provision of drainage and sewage treatment, poor insulation and energy performance and “poor understanding, application of good building practice”. Although the first of these failures was addressed – under duress by the European Court of Justice – by introducing an inspection regime for septic tanks (of which we now have about half-a-million), the reality is very few such inspections are actually carried out".  (Link)

Public Consultation Information

New single dwellings (including self-build) and extensions to existing dwellings (PDF)