We build far beyond our standard footprint. While Optimus Build is known for premium modular units up to 45m², our expertise stretches to full-scale residential and commercial developments — all tailored entirely to your vision.
From the very first turning of the sod to the final handover of your keys, we manage every single detail of your project. No chasing contractors, no juggling schedules, no stress. Just one team, one point of contact, and a seamless journey from start to finish.
Bespoke homes: One-off custom houses built from your drawings or designed from scratch.
Duplexes & apartments: High-quality, multi-story residential blocks engineered for maximum efficiency.
Glamping & holiday parks: Full site delivery for holiday parks, campsites, and multi-unit glamping retreats.
Bring your own plans – Already have architectural drawings? We routinely build directly from your existing plans.
In-house architecture – Don’t have a design yet? No problem. Our in-house architect will create a custom plan tailored to you.
Visit our Cork office — Pop into our base in Little Island, Cork to look over ideas with the team.
We come to you — Prefer to meet on your own turf? We’ll come directly to your site, or anywhere that suits you.
Full planning management – We look after your entire planning application process, from start to finish.
Complete compliance – Our team makes sure your bespoke design seamlessly meets all local regulations.
All trades attached – No need to source external contractors or manage messy site schedules.
In-house M&E – Dedicated mechanical and electrical specialists are integrated directly into our crew.
One point of contact – Optimus Build handles everything, ensuring a seamless, premium finish.
A modular home is a permanent house built in sections in a controlled factory environment and then transported to your site for installation. Once installed, it complies with the same building regulations and standards as a traditionally built home.
Unlike temporary mobile homes, our modular homes are designed for permanent living, long-term durability, and full compliance with Irish regulations.
Modular homes are permanent dwellings built to full residential standards. Mobile homes are typically temporary or transportable units with different regulations and structural systems.
Our homes are:
Simply contact our team to arrange an initial consultation. We’ll discuss:
No. Many clients contact us before purchasing land to understand:
Yes. Our homes are engineered specifically for Irish climate conditions, including wind, rain, and moisture control.
Yes. A professionally built modular home is a permanent structure and is treated similarly to a traditional home for planning, insurance, and mortgage purposes, provided it meets Irish building regulations.
Typical timelines range from 8–16 weeks depending on:
Because much of the work is completed off-site, modular homes are significantly faster than traditional construction.
No planning permission required as long as modular is at the rear of main house and a minimum of 25m² of garden space is left over and it’s 45m² or under in size.
Planning requirements depend on:
We can assist you through the planning process.
Yes. Our homes are designed and built to comply with current Irish building regulations, including:
In many cases, yes. Approval depends on local planning policies and site eligibility. Rural planning rules vary by county.
The regulations (Class 3A “Auxiliary Habitable Dwelling” exemption) allow you to bypass planning permission if you meet strict site requirements:
The 25m² Rule: The development cannot reduce the remaining private open space reserved for the main home’s occupants below 25m².
Cumulative Space: The 45m² maximum includes the new modular home plus any existing relevant garden structures (like sheds or garages) already on the property.
Location: The modular home must be built strictly in the rear garden of your principal residence.
Height Restrictions: Maximum height is 4 metres for a tiled/slated pitched roof, or 3 metres for a flat roof.
Clearance: The structure must stand at least 0.6 metres away from any side or rear boundary fences.
