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Design, Cost & Planning

Home insulation in Dublin, Planned Around How Your House is Built

Get warmer rooms, lower bills and a better BER with our home insulation solutions. BuildTech installs external wall, internal wall, attic and floor insulation across Dublin, matched to your house type and built into a renovation or retrofit, with the SEAI grant handled for you.

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  • No project starts without a clear, agreed budget
  • The right measure for your house, not a one-size sell
  • SEAI registered, grant application handled on your behalf
  • Dublin, Kildare, Meath and Wicklow. CIRI registered, fully insured

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All enquiries are reviewed by our team before a consultation is confirmed.

CIRI Registered

Construction Industry Register Ireland

5★ Google Rated

Verified by Dublin homeowners

CIF Member

Construction Industry Federation

100+ Projects Delivered

Across Greater Dublin Region

Insulation Only Pays Off When it Suits Your House

Insulation saves money. But only when the right measure meets the way your home is built. Pick the wrong one and you can trap damp, leave cold spots, or spend the budget where it helps least. 

Our team gets it right, and your house feels it. Less heat is lost. Warmer winters. A higher BER, which lifts comfort, running costs, and resale value. Homeowners get the best outcome with insulation when it is combined with our wider renovation projects. This is why it works best inside a full deep retrofit rather than on its own.

  • Fabric checked first: what you have now, and how the house is built
  • SEAI grant handled for you, net cost confirmed before work starts
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Client Reviews

What Our Clients Say

Rated 5★ across Google, Houzz, and OnlineTradesmen by Dublin homeowners.

★ ★ ★ ★ ★
GB
Graham Barry
Google

"Professional, reliable service with clear communication and integrity."

"Professional, reliable service with clear communication and integrity. The team kept us informed at every stage and delivered exactly what was promised. Would recommend to anyone looking for a trustworthy provider."

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★ ★ ★ ★ ★
KW
Kirsten Wendenburg
Google

"Excellent communication and budget-friendly suggestions throughout."

"Excellent communication and budget-friendly suggestions throughout. They took the time to understand our needs and offered practical options at every step. The end result exceeded our expectations."

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★ ★ ★ ★ ★
OA
Olga Antipenko
Google

"Excellent communication and support throughout. Highly recommend."

"Excellent communication and support throughout. Highly recommend. From the first call to the final handover everything was handled professionally. The team was responsive, knowledgeable and clearly cared about the outcome."

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★ ★ ★ ★ ★
JM
James Murphy
Google

"Outstanding work from start to finish. Couldn't be happier with the result."

"Outstanding work from start to finish. Couldn't be happier with the result. They were punctual, tidy and clearly took pride in their craft. The whole project came in on time and on budget."

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★ ★ ★ ★ ★
SO
Sarah O'Brien
Google

"Genuinely impressed with the quality and attention to detail."

"Genuinely impressed with the quality and attention to detail. Every aspect of the project was carefully considered and the finish is excellent. I'd use them again without hesitation."

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★ ★ ★ ★ ★
DK
David Kelly
Google

"Top-class service. Friendly team and a fair price."

"Top-class service. Friendly team and a fair price. They were upfront about everything, no hidden surprises and the work was completed to a very high standard. Already recommended them to a neighbour."

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Which Insulation Your Dublin Home Actually Needs

The right insulation comes down to how your home was built, not which grant is going. The only way to be sure is to look at how your home is actually built, then match the insulation to it. 

We check this in our initial consultation, before any product or price is discussed, so your budget goes where it does the most good. 

Here is what matters.

  • External or internal wall insulation for older solid-wall homes
  • Attic insulation, the biggest single win for most Dublin homes
  • Floor and cavity wall insulation where the construction allows
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Not sure what your home renovation will cost? We give you full cost clarity before you commit to anything.

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0818 333 443
How It Works

A Structured Process Built Around Your Budget

BuildTech follows a clear four-step pathway, from initial feasibility through to completed construction, designed to protect your budget and keep your project on track.

1

Feasibility

Budget & scope clarity before any design work begins

Design

Measured survey, technical layout & cost plan
2
3

Planning

Managed application where required, many extensions are exempt

Build

On-time, on-budget delivery with full project management
4
Start with a Feasibility Call
Why BuildTech

Why Choose Home Insulation in Dublin from BuildTech?

Working with us means you get a design and build contractor, not a one-measure installer. The insulation is specified as part of our whole house renovation, installed to building-regulation standard, and signed off with the rest of the works by an Independent Chartered Engineer.

  • We tell you if a measure is not worth doing on your home
  • We advise the right option for your house, not the dearest
  • SEAI registered, grant application handled for you
  • All works certified by an Independent Chartered Engineer
  • Full cost agreed before anything starts

How Our Home Insulation Works Best with Renovation or Deep Retrofit

Our insulation gives the best return when it travels with other work. Combine measures and you get one BER uplift, one contractor, one disruption, and grants claimed together.

As part of a deep retrofit

Insulation is the fabric-first step in a deep retrofit. Our one managed programme lifts the whole home’s rating, instead of a run of separate jobs.

During a whole-home renovation

When you are already carrying out a home renovation, walls and floors are open anyway. That is the cheapest time to insulate, and it is done once, properly.

Alongside an extension or attic conversion

Choosing a rear extension building or attic conversion means new fabric is insulated to spec while the older parts are upgraded at the same time.

Paired with a heat pump or new windows

Insulate before, or with, a heat pump or new windows and the whole system is sized right. Warm the fabric first, then the heating works less and costs less to run.

Standalone measure

BuildTech takes insulation as part of our larger renovation or house extension service, with a minimum project value of €100,000. Where a home needs a full upgrade, that is where we earn our place.

Common Issues

The Insulation Mistakes We See in Dublin Homes

Most insulation problems trace back to one thing: a single measure done without looking at the whole house. The result is damp, cold spots, or money spent in the wrong place. These are the four we fix most.

Sealing the house, forgetting the air

Make a home tighter without proper ventilation and moisture has nowhere to go. Damp and mould follow. Airtightness and ventilation are planned together, or not at all.

The wrong measure for the wall

Cavity fill in a solid wall, or the wrong external system for the build, underperforms and can harm the wall. The measure has to match the construction.

Chasing the grant, missing the point

Grant-funding one measure while the biggest heat loss is left alone gives a poor return. We assess the whole fabric first, then spend where it counts

Cold bridges left in the detail

Insulating the wall but leaving gaps at window reveals, floors and junctions lets heat keep escaping. The detailing matters as much as the main measure.

Do You Need Planning Permission in Dublin for External Wall Insulation?

Most home insulation is exempted development and needs no planning permission. The one to watch is external wall insulation. It can need permission where it clearly changes the look of the front of the house, or on a protected structure or in an Architectural Conservation Area.

We confirm your planning position before any work is committed, so there are no surprises. In most cases the answer is straightforward, and we tell you clearly either way.

Where each measure usually stands:

  • Attic insulation, exempt
  • Internal wall insulation (dry lining), exempt
  • Cavity wall insulation, exempt
  • Floor insulation, exempt
  • External wall insulation, usually fine to the rear, but may need permission to the front, on a protected structure, or in an ACA

Not Sure Where Your Home Stands?

BuildTech confirms your planning position as part of every feasibility consultation before any design fees are committed. If your insulation is exempt, we tell you plainly and save you the cost of an application.

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Common Questions

Frequently Asked Questions

For older Dublin homes with solid walls, external wall insulation is usually the strongest option, with internal wall insulation where the front cannot change. Attic insulation is the biggest win for almost any home. We assess yours and advise.
Yes. It adds thickness to the walls and finishes with a render coat that can be coloured. Most homeowners think it improves the look. Attic, floor and internal wall insulation have no effect on the outside.
Yes. Insulation cuts heat loss and lifts your BER, which affects comfort, running costs and value. How much depends on the measure and the state of the house before you start.
As part of a renovation or retrofit, in most cases. Doing it while walls, floors or roofs are already open costs less and lifts the whole home in one go. BuildTech takes insulation as part of a larger project.
SEAI grants cover the main insulation measures, and as SEAI registered contractors we handle the application and confirm your net cost before work starts. The amount depends on your home and the measure, which we confirm at your feasibility consultation.

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We review your enquiry before confirming a consultation — ensuring only suitable projects proceed.

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  • Min. project €100k · No surprises

What's Included

  • Feasibility consultation included
  • Measured survey & assessment
  • Technical design package
  • Full project management
  • Engineer certification on completion

Related Services

Home Renovation

House Extension

Attic Conversion

Deep Retrofit

Feasibility Consultation

Not sure where to start?

A feasibility consultation (€200 call · €500 home visit) confirms your planning position before you spend anything on drawings.

Book Feasibility Call
Explore more

Our Services

BuildTech is a specialist design and build contractor. We take on a focused range of projects — and we do not progress any project without a clear, agreed budget.

Single-Storey Rear Extension

The most common home project in Dublin. Open-plan kitchen and living, utility room, or additional family space — from feasibility through to a certified, compliant build.

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Home Renovation

Whole-home renovations and structural alterations for Dublin homeowners. Internal reconfigurations, layout redesign, and full refurbishment — all budget-led from day one.

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Feasibility Consultation

€200 call or €500 home visit. We establish what is realistically achievable within your budget before any design work begins — saving you time, money, and stress.

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Planning Permission

Full application management — pre-planning strategy, drawings, submission, and decision monitoring. Many extensions are planning exempt; we confirm this first.

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Already Have Plans?

Cost Planning & Construction Review from €2,500 + VAT. We provide a full cost breakdown of your existing drawings — gap identification, budget alignment, and value engineering.

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Cost & Technical Design

Measured survey, technical layout, and a detailed cost plan — all aligned to your budget before construction begins. No over-specified designs that cannot be built within your means.

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Our work

Recent Projects

Each project below started with a feasibility consultation and a clear budget. Here is what we delivered.

All Projects

Extension + Renovation

Full Ground Floor Renovation with Rear Extension

Location : Dublin

Scope : Ground floor knock-through, rear extension, open-plan kitchen and living

Status : Planning exempt

✓ Delivered on time and on budget

Extension + Renovation

Sandymount Seafront
Renovation

Location : Sandymount, Dublin 4

Scope : Full home renovation of period seafront property

Status : Planning exempt

✓ Full project management, completed on programme

Extension + Renovation

Rear Extension Plus Partial Renovation, Dublin 14

Location : Dublin 14

Scope : Single-storey rear extension and partial ground-floor renovation

Status : Planning exempt

✓ On budget, handover on schedule

Extension + Renovation

20 sqm Single-Storey Rear Extension, Mount Merrion

Location : Mount Merrion, South Dublin

Scope : 20 sqm flat-roof rear extension, open-plan kitchen and dining

Status : Planning exempt

✓ Completed on time and on budget

Extension + Renovation

Split-Level Open Plan Kitchen & Lounge Renovation

Location : Dublin

Scope : Structural reconfiguration, split-level open-plan kitchen and lounge

Status : Planning exempt

✓ Full project management included

Planning Insulation for Your Home in Dublin?

Start with a feasibility consultation. We confirm what your home needs, what it costs, and how the SEAI grant applies, before you commit to a thing.

Request a Consultation →
0818 333 443

No obligation. No pressure. Just honest advice.