Restored stone and brick opening in a traditional west of Ireland building

Spiddal, Galway | An Spidéal, Gaillimh

PROFE Building Engineering & Planning

Planning, engineering and construction guidance for homes, extensions and commercial projects across Galway. Premium technical work, local knowledge and clear advice.

Based in Spiddal Local knowledge | Eolas aitiuil
Consultations Wednesdays only, 2:30pm–5:00pm
Owner led Frank O Reilly, Chartered Building Engineer and Fellow
Gaeltacht na hEireann

Tá muid ag obair trí Ghaeilge sa Ghaeltacht le 20 bliain anuas, agus tá muid lán-sásta an obair a dhéanamh trí Ghaeilge nó trí Bhéarla.

Services | Seirbhísí

Engineering, planning and construction support under one roof.

Clear technical support for planning, design, compliance and construction decisions.

Start your project
01

Planning applications

Planning drawings, site strategy, application support and practical guidance for Galway residential and commercial submissions.

02

Structural engineering

Structural advice for alterations, extensions, openings, roofs, stair designs and construction details.

03

Site surveys

Measured surveys, site reviews and early-stage feasibility checks before committing to design or construction decisions.

04

CAD drawings

Clean drawings for planning, building control, tendering, construction and client review.

05

Building regulations

Building regulation advice, fire cert input and construction plan support for compliant project delivery.

06

Project management

Practical coordination from feasibility to construction, helping clients keep scope, drawings and decisions aligned.

Modular homes | Class 3A

Modular homes and the Class 3A exemption.

A plain-English guide to the new rear-garden dwelling exemption, what it can cover and what should be checked before ordering a modular home.

Discuss your site
32–45 m² The new dwelling must be at least 32 m². Its area plus relevant existing Class 3 structures cannot exceed 45 m².
Rear garden It must be a permanent detached house in the rear garden of the owner’s sole or main residence.
14-day notice The planning authority must receive the prescribed notification at least 14 days before work starts.
Illustration of a permanent detached modular dwelling in the rear garden of an Irish principal house
Illustrative garden-home concept showing a detached unit, retained open space and an internal pedestrian route. Every real property and proposal must be measured and assessed individually.

What changed in 2026

A limited route for a permanent detached garden dwelling.

Class 3A of S.I. No. 340 of 2026 can remove the need for a full planning application for a qualifying detached house in the rear garden of a principal home. It is aimed at permanent habitable accommodation—not caravans, mobile homes or temporary cabins.

The exemption took effect on 27 July 2026 and applies only where the development is commenced and completed within the relevant period ending 31 December 2030. All of its conditions must be satisfied together.

It is not an automatic 45 m² permission. Existing garden structures, the planning history, remaining open space, boundaries, access, services and intended occupation can all affect the route.
01
Property and placement

A new permanent house, fully detached and positioned in the rear garden. The principal house must be the property owner’s sole or main residence when work starts and must not have been subdivided.

02
Floor area and open space

The dwelling must be at least 32 m². Together with relevant structures previously provided under Class 3, the total cannot exceed 45 m², and at least 25 m² of private open space must remain.

03
Height and boundaries

Maximum height is 4 m with a tiled or slated pitched roof, or 3 m for any other roof. The structure and any boundary-facing windows must remain at least 0.6 m from the relevant wall or boundary.

04
Access and services

Independent pedestrian or wheelchair access must remain within the existing property. No new access onto a road is allowed, and utility connections must not be separate from the principal house.

05
Wastewater

Where treatment is non-piped, the unit cannot encroach on an approved percolation area. The existing system must have sufficient compliant capacity and no additional treatment unit can be installed under this class.

06
Occupation and notice

The dwelling must be occupied in conjunction with the main house, cannot be sold or subdivided separately and cannot be used for short-term letting. The planning authority must be notified at least 14 days before work begins.

Start with the property

Planning-history review

Check the principal house, earlier permissions, existing sheds or garages and any condition that may restrict exempted development.

Measure before buying

Site and layout check

Record the proposed floor area, remaining private open space, overall height, boundary distances, access and service route.

Confirm the full route

Planning and compliance advice

Class 3A planning status is separate from Building Regulations, Building Control, fire safety, drainage, title and supplier certification.

Important: “planning exempt” does not mean exempt from Building Regulations, Building Control, fire safety, drainage, title, insurance or other legal requirements. A modular or off-site system also needs appropriate Irish technical evidence.

Rules reviewed 2 September 2026. Read the statutory instrument and your planning authority’s current notification guidance.

Have a modular-home site in mind?

Talk through the site before committing to a unit.

Include the property location, approximate garden size, intended use and any model or drawings you already have.

Selected work | Obair roghnaithe

Residential, commercial, conservation and structural project examples.

Projects range from one-off houses and extensions to church refurbishments, feasibility studies and structural design details.

Start your project
Commercial feasibility concept for a coastal development

Commercial feasibility

Commercial Feasibility

Early-stage option testing for a commercial coastal site, reviewing access, parking, planning risk and development potential.
Modern rural residence design with stone and render finishes

Residential design

Modern rural residence

A contemporary family home concept balancing stone, render, glazing and practical rural site planning.
Interior design render with skylight and warm finishes

Interior design render

Daylight and finish concept

Interior visual exploring daylight, warm finishes, circulation and a calm working corner before detailed design decisions.
Artist impression of a barn roof rear design concept

Artists impressions

Artists impressions

Sketch-style concept visuals that help clients and planners understand scale, materials and character before detailed drawings are prepared.
Modern extension with large glazing at sunset

Extension and renovation

Contemporary house extension

A clean modern extension bringing additional living space and wide views while respecting the original stone house.
Townhouse and apartment concept render

Residential feasibility

Urban housing concept

A feasibility-led housing proposal testing massing, parking, frontage and planning potential.
Completed church interior with timber pews and exposed beams

Community and heritage

Church refurbishment

Interior upgrade and construction coordination for a sensitive community building.
Curved timber and glass stair installation

Interior detail

Custom stair coordination

Technical support and construction stage coordination for a bespoke curved staircase.
Timber and steel roof structure during construction

Structural work

Timber and steel structure

Structural design support for timber framing, steelwork and complex renovation conditions.

Client feedback | Aiseolas

Trusted advice from early idea to construction stage.

Short feedback from previous clients who needed clear planning, engineering and construction guidance.

Start your project

"Clear advice from the first call and a very practical route through planning."

Past client

"The drawings and engineering input made the builder's job much easier."

Past client

"Straightforward communication, good local knowledge and no confusion about the next step."

Past client

People | Daoine

Owner-led expertise with design support.

Direct access to experienced technical guidance, with support for visual design, drawing preparation and project presentation.

Start your project
Frank O Reilly

Founder and owner

Frank O Reilly

Chartered Building Engineer, Registered Building Surveyor and Fellow. C. Build Eng, Fellow, Registered Building Surveyor, ICIOB, Dip Con Mgt, CPHD.
Eoin Conneely

Design support

Eoin Conneely

Architecture student at University College Dublin supporting presentation, design thinking and project visuals.

Free consultations | Comhairliuchain saor in aisce

Book a Wednesday consultation.

Meetings are available on Wednesdays only, from 2:30pm to 5:00pm. Choose an available Wednesday time through Google Calendar.

Open booking calendar

Contact | Teagmháil

PROFE Building Engineering & Planning

Bunaithe sa Spidéal, Gaillimh. Available for residential, commercial and community projects across the west of Ireland.