Dublin renovation specialists

Design Your Extension
Around Your Budget —
Not the Other Way Around

Most homeowners discover too late that their project costs far more than expected. BuildTech starts with feasibility and cost clarity so you know exactly what is possible before committing to design or construction.

Serving the Greater Dublin Region  ·  Fully insured and registered Design and Build Contractor  ·  All building works certified by an Independent Chartered Engineer

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Or call: 0818 333 443
CIRI Registered
Construction Industry Register Ireland
5★ Google Rated
Verified by Dublin homeowners
SEAI Registered
Sustainable Energy Authority of Ireland
100+ Projects Delivered
Across Greater Dublin Region
Why Projects Run Into Budget Issues

Why Do So Many Home Extension Projects Fail?

The traditional design-first approach leaves homeowners exposed to a costly build or costly redesign.

⚠️
The Traditional Approach
Design first, cost later
1
Homeowner hires a designer

Full architectural drawings are commissioned before any builder is consulted about cost.

2
Builders price the work

Quotes come back far above what the homeowner budgeted. The design is over-specified for the available funds.

3
Project stalls or is abandoned

Months of planning and thousands of euros are wasted. Stress, delays, and frustration follow.

✅
The BuildTech Approach
Budget first, design second
1
Budget first, design second

We start with a feasibility consultation to establish what is realistically achievable within your budget — before any design work begins.

2
Cost clarity before commitment

You receive honest, transparent cost guidance based on real construction data — not estimates produced to win a sale.

3
Practical, buildable solutions

Every design we produce is aligned with your budget and Irish Building Regulations — so what you design is what gets built.

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About BuildTech

Dublin's Design
& Build Specialists

BuildTech is a fully registered Design & Build contractor based in Dublin, specialising in home extensions and whole-home renovations. We are not a general builder — we are a specialist contractor with a single focus: delivering high-quality, compliant builds on time and on budget.

Full Project Management
Design through to certified completion
Feasibility-First Process
Budget clarity before any design work
Trusted Dublin Builders
100+ homeowners across Greater Dublin
Fully Accredited
CIRI · CIF · SEAI · Business All-Stars
Request a Consultation → Learn More About Us
→
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
Rear extension interior — open plan kitchen Dublin
Rear Extension · Dublin
Single-storey · Open plan living
Architectural drawings — BuildTech design process
House extension Dublin — BuildTech
Kitchen renovation Dublin — BuildTech
100+
Projects Delivered
Our Core Expertise

Renovations & Single-Storey
Rear Extensions

The single-storey rear extension is the most common and most practical home improvement project in Ireland — and where BuildTech has its deepest expertise, having delivered projects across Dublin and the surrounding counties.

Whether you want an open-plan kitchen and living area, a utility room, or additional family space, BuildTech takes your project from feasibility through to a finished, compliant build.

Single-storey rear extensions & open-plan transformations
Whole-home renovations & structural alterations
Internal reconfigurations & layout redesign
Certified by Independent Chartered Engineer
View Our Projects Request a Consultation →
Client Portal

Full Project Transparency — Your BuildTech Client Portal

Every BuildTech client gets access to a dedicated project portal — live drawings, costs, updates, and team communications in one place.

BuildTech in Action

Our Delivered Projects

Real BuildTech projects — designed, managed, and built to budget across Greater Dublin.

Stunning Opening — BuildTech Project
Home extension & renovation·Greater Dublin
Stunning Architecture — BuildTech Project
Architectural design & build·Greater Dublin
Transparent Pricing

What Does a Home Extension or Renovation Cost in Dublin?

BuildTech believes in full transparency on cost. Here is a realistic guide to typical project budgets so you can make an informed decision before you commit to anything.

Standard Specification
€2,000 – €3,000
per m²
Straightforward renovation with good access, minimal tie-in work to existing house or standard specification. Suitable for homeowners prioritising budget efficiency and practical additional space.
Most Common
Mid-Range Specification
€3,000 – €3,500
per m²
More complex build — moderate tie-in works to existing house, mid-range specification, logistics and site access considerations.
Premium Specification
€3,500+
per m²
High complexity build — significant tie-in works to existing house, high-spec finishes, challenging site access and logistics.

Important: These figures are indicative ranges based on typical Dublin projects. The range of costs is primarily related to the complexity of the build — logistics, site access, and structural requirements all affect costs. The biggest variable in extension projects is how much work needs to be done on the existing house in order to tie-in the new build (e.g. knock wall, rewire, replumb, wall finish, floor finishes). A BuildTech feasibility assessment will give you an accurate, project-specific cost plan. Engineer costs are not included in these figures.

Request a Feasibility Assessment →
Second Client Pathway

Already Have Architectural Drawings?

Many homeowners come to BuildTech with drawings already in hand — but no clear picture of what their project will actually cost to build. If you have plans but need cost clarity, value engineering, or a construction review, we offer a dedicated service for you.

Cost Planning & Construction Review Service

From €2,500 + VAT — Fixed Fee
Full cost breakdown of your architectural design — line by line, no surprises
Gap & risk identification — structural, planning, or specification issues flagged before construction
Budget alignment advice — honest assessment of whether your design is buildable within your budget
Value engineering options — practical alternatives to reduce cost without compromising quality
Request a Cost Planning Review 0818 333 443
Architectural drawings review — BuildTech Dublin
Cost planning and construction review — BuildTech
Clarity & Positioning

What We
Don't Do

BuildTech is a specialist design and build company. To maintain the quality and focus our clients expect, we do not take on every type of project.

"We do not progress projects without a clear, agreed budget."

"If your expectations do not align with your budget, we will tell you immediately."

If your project falls outside these parameters, we'll tell you clearly and respectfully at the outset — saving your time and ours. If it is within scope, we will give you our full attention and expertise.

Partial or Cosmetic Renovations

We do not take on partial renovation work or cosmetic-only projects.

Projects Under €100,000

Our minimum project value is €100,000. Smaller projects are outside our scope.

Single-Trade Projects

Kitchen-only, bathroom-only, insulation-only, or other single-trade projects are not within our remit.

Price Open Tenders for Free

We do not price speculative tenders without a prior feasibility engagement.

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."

"BuildTech expertly handled my Dublin house renovation, offering professional, reliable service with clear communication, integrity, and cost-effective solutions, saving me time and stress. From the very first consultation I knew I was dealing with a team that genuinely cared about getting the job done right."

KW
Kirsten Wendenburg
Google

"Excellent communication and budget-friendly suggestions throughout."

"BuildTech fully renovated our house, offering excellent communication, budget-friendly suggestions, and efficient problem-solving. We are thrilled with the result, which exceeded our expectations. The team was professional at every stage and the final finish was outstanding."

OA
Olga Antipenko
Google

"Excellent communication and support throughout. Highly recommend."

"BuildTech helped with my rear extension, providing excellent communication and support throughout. The project was delivered on time and exactly as quoted. The team was respectful of our home and kept disruption to a minimum. Highly recommend to any Dublin homeowner."

JH
John Hagan
Google

"Handled my renovation with professionalism and care. Very pleased."

"BuildTech handled my renovation, including plumbing and plastering, with professionalism and care. Very pleased with the results. The team was courteous, tidy, and kept me informed at every stage."

JH
Jason Hollifield
Google

"Expertly guided my house renovation, delivering exactly what I wanted."

"BuildTech expertly guided my house renovation, delivering exactly what I wanted. The process was smooth from start to finish and the quality of the work speaks for itself."

SM
Salena McCarthy
Google

"Made building my home easy and successful."

"BuildTech made building my home easy and successful. The team was knowledgeable, responsive, and delivered on every promise. Thanks, BuildTech!"

JB
Judy Braodnax
Google

"My kitchen looks amazing after the renovation — great work from BuildTech!"

"My kitchen looks amazing after the renovation — great work from BuildTech! The team transformed the space completely and the quality of the finish is exceptional."

VV
Victoria Vetter
Google

"Kitchen and bathroom renovation — beautiful, eye-catching result."

"Thanks to BuildTech for my kitchen and bathroom renovation, giving my home a beautiful, eye-catching look. The team were professional throughout and the result exceeded what I had hoped for."

FP
Fabio Pulvirenti
Google

"The team was very kind to answer all my questions throughout."

"So far so good. The team was very kind to answer all my questions throughout the process and I felt informed and comfortable at every stage."

AH
Anne-Marie Hickey
Google

"Expertly managed my cottage renovation remotely — great communication and quality results."

"BuildTech expertly managed my cottage renovation remotely — great communication, quality results, and a helpful team. Highly recommended! The remote management process was seamless and the results were excellent."

KC
Kristen and Colm
Google

"Transformed our home with excellent management and clear communication."

"BuildTech transformed our home, providing excellent management and clear, responsive communication throughout the entire project. We are delighted with the result and would not hesitate to recommend them."

J
Justin
OT OnlineTradesmen

"Professional, courteous, punctual — stayed late, finished early. Excellent work."

"Ronan's team revamped a room, gutting, rewiring, insulating, plastering. Professional, courteous, punctual, stayed late, finished early, excellent work, very pleased. Would not hesitate to use BuildTech again."

D
Dylan
h Houzz

"Professional, courteous, punctual — finished early. Excellent work."

"Ronan's team revamped a room, gutting, rewiring, insulating, plastering. Professional, courteous, punctual, stayed late, finished early, excellent work, very pleased. A pleasure to deal with from start to finish."

M
Matt
h Houzz

"The client portal gives full project transparency — drawings, costs, updates and team comms."

"Buildtech's client portal gives full project access, drawings, costs, updates & team comms, ensuring full transparency. This level of visibility into the project is something I had never experienced with a contractor before — outstanding."

K
Kirsten
h Houzz

"Superbly renovated our home — great team, clear communication, outstanding results."

"BuildTech renovated our home superbly — great team, clear communication, smart advice, and outstanding results! Every aspect of the project was handled professionally and the quality of the finish is exceptional."

Recent Work

Recent Projects

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

View All Projects →
Knowledge & Guides

Knowledge & Guides

Practical advice for homeowners planning an extension or renovation.

View All Articles →
Why Most Home Extensions Cost More Than Expected
Cost Guide
Why Most Home Extensions Cost More Than Expected
The most common reason home extension projects go over budget — and how to avoid it.
Read More →
Planning Exempt Extensions in Ireland
Planning Guide
Planning Exempt Extensions in Ireland: What You Need to Know
A clear guide to planning exemption rules for single-storey rear extensions in Ireland.
Read More →
How to Know If Your Extension Is Affordable
Feasibility
How to Know If Your Extension Is Affordable Before You Start
The questions every homeowner should ask before commissioning architectural drawings.
Read More →
Take the First Step

Not Sure What Your Budget Can Achieve?

A BuildTech feasibility consultation gives you honest, expert guidance on what is realistically achievable within your budget — before you commit to any design or construction costs.

Request a Consultation → Call Us: 0818 333 443
No obligation. No pressure. Just honest advice.
Common Questions

Frequently Asked Questions

Answers to the most common questions from homeowners considering an extension or renovation.

A feasibility consultation is the starting point for any BuildTech project. Before you spend money on architectural drawings or commit to a contractor, we assess what is realistically achievable within your budget. You receive honest guidance on planning considerations, construction costs, design options, and project timelines. It costs €200 for a phone or video consultation, or €500 for an on-site visit. Most homeowners find it saves them thousands by avoiding over-specified designs that cannot be built within their budget.
Many single-storey rear extensions in Ireland are planning exempt under the Exempted Development regulations. A single-storey extension to the rear of a house can generally be built without planning permission provided it does not exceed 40m² of floor area (combined with any previous extensions), does not reduce the rear garden below 25m², and does not exceed the height of the existing house. BuildTech will assess your specific property during the feasibility consultation and confirm whether planning is required.
The typical cost range for a single-storey rear extension in Dublin is €2,500 to €3,500 per m². The range is primarily determined by the complexity of the build — specifically how much work is required to tie the new extension into the existing house (structural alterations, rewiring, replumbing, floor and wall finishes). A BuildTech feasibility assessment will give you an accurate, project-specific cost plan before you commit to anything.
BuildTech primarily serves Greater Dublin and the surrounding counties — including Dublin City, North and South County Dublin, Kildare, Meath, and Wicklow. We have completed over 100 projects across these areas. If you are outside these areas, contact us on 0818 333 443 and we will confirm whether we can assist.
A typical single-storey rear extension takes 12 to 20 weeks from construction start to completion. This includes groundworks, structure, roof, windows and doors, first and second fix, and finishes. The timeline depends on the size and complexity of the build. Planning applications (where required) typically add 8–12 weeks before construction can begin. BuildTech will provide a detailed project programme as part of the cost and technical design stage.
BuildTech's fixed price covers the full construction contract — groundworks, structure, roof, insulation, windows and external doors, first and second fix mechanical and electrical, plastering, tiling, and painting. It does not include furniture, appliances, or engineer certification fees. You will receive a detailed cost breakdown at the technical design stage so there are no surprises.
Yes. Where planning permission is required, BuildTech manages the full application process — including preparation of drawings, submission to the local authority, and monitoring the decision. We work with our in-house design team and, where required, specialist consultants to ensure a compliant and approvable application. Planning typically takes 8–12 weeks from submission to decision.
Yes. If you already have architectural drawings, BuildTech offers a dedicated Cost Planning & Construction Review Service. We will provide a full cost breakdown of your design, identify any gaps or risks, and advise on value engineering options where required. This service starts from €2,500 + VAT and gives you complete cost clarity before you commit to construction.
BuildTech's minimum project value is €100,000. We are a specialist design and build contractor focused on home extensions and whole-home renovations. We do not take on cosmetic-only projects, single-trade works (kitchen-only, bathroom-only), or projects below this threshold. If your project is below this value, we will tell you clearly at the outset.
Yes. BuildTech is fully registered and insured. We are members of the Construction Industry Federation (CIF), registered with the Construction Industry Register Ireland (CIRI), accredited by the Chartered Institute of Building (CIOB), and registered with the Sustainable Energy Authority of Ireland (SEAI) for energy upgrade works. All our projects are certified by an independent chartered engineer on completion.
Get in Touch

Request a Consultation

Before committing to any design or construction costs, speak with our team. A BuildTech feasibility consultation will determine what is realistically achievable within your budget — giving you the clarity and confidence to move forward.

€200
Feasibility Call
Phone or video consultation. Budget guidance, planning considerations, design options, and construction timeline.
€500
Home Consultation
On-site visit. Site inspection, structural considerations, budget feasibility review, and recommended next steps.
How it works: Complete the enquiry form. Our team reviews your project details within 1 business day and confirms your consultation booking. All consultations are reviewed internally before confirmation.
Prefer to call? 0818 333 443
Mon–Fri 8:30am–5:30pm

Request a Consultation

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

Our team will review your enquiry and respond within 1 business day to confirm your consultation.

NO OBLIGATION CIRI REGISTERED
Call Us Get a Consultation