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Modular Home Extensions, Made for Harrow
Designed around your home, factory-built in Blackburn in as little as 4 weeks, and installed on-site in under one.
EazyBase in Harrow
Why Harrow homeowners choose modular
Harrow is a borough of homes people hold on to. From the bay-fronted Metroland semis of North Harrow and Rayners Lane to the family houses of Pinner and Stanmore, these are properties bought for the long haul — for the schools, the gardens, the ten-minute walk to the station. The trouble is, family life has a habit of outgrowing the floorplan before anyone is ready to leave it.
That's where modular home extensions in Harrow come into their own. EazyBase designs your extension around your home, builds it in our Blackburn factory in as little as four weeks, then installs it on-site in under a week. A bigger kitchen, a proper home office, a playroom, a garden room — added with a fraction of the disruption of a traditional build.
No months of scaffolding, no skip on the drive from spring to autumn. Just a precise, factory-finished space that feels like it was always meant to be there.
Local knowledge
Built for Harrow homes
Extending a Metroland semi
The 1930s semis that define so much of Harrow — Kenton, North Harrow, Rayners Lane, Headstone — were generously built for their time, but their kitchens rarely suit the way families cook and gather now. A single-storey rear extension is the classic answer, opening the back of the house into a kitchen-diner that runs the width of the plot. Because our modules are precision-built in the factory, we design around the quirks of interwar housing stock — bay returns, outriggers, shared side passages — rather than discovering them halfway through a long on-site build.
Planning in Harrow
Much of the borough's suburban housing benefits from permitted development rights, which often cover single-storey rear extensions within set size limits — though you should always check with Harrow Council before committing, as rights vary from house to house. Harrow-on-the-Hill is a different matter: its conservation areas rightly come with tighter controls, and some streets elsewhere carry Article 4 directions or previous alterations that change the picture. We help you understand what applies to your home early on, so the design you fall in love with is one you can actually build.
Extending instead of moving
Plenty of Harrow families find themselves in the same bind: the house is one room too small, but moving means giving up a school catchment, a commute that works and neighbours you actually like — before you've even counted stamp duty and moving costs. An extension lets you stay put and gain the space you'd have moved for. A playroom that clears the lounge of toy boxes, a dedicated office that gives the spare bedroom back, a dining space big enough for both sets of grandparents. Same address, same school run, more house.
Why factory-built works in Harrow
Harrow's residential streets weren't laid out with six months of building work in mind. Traditional extensions mean deliveries, trades and skips on tight suburban roads for a season or more. Ours arrive largely complete. Your extension is manufactured in our Blackburn facility — weatherproof, insulated and finished to a factory standard no rained-off site can match — then installed at your home in under a week. For busy family neighbourhoods, from Pinner's cul-de-sacs to Stanmore's avenues, that difference in disruption is exactly the point.
Every Harrow project follows our 8-step ORDER process
From discovery call to final quality check — one team, one plan, no surprises. See how it works →
What customers say
Trusted from first sketch to final fix
What a team!
Brilliant results and so quick. We couldn’t be happier with our build. I highly recommend Amir, Sol, Jess and the Eazybase team!
Best Work
I’ve had an extension built with Eazybase Extensions, the best building work I’ve ever invested in.
Good to know
Harrow questions, answered
Ready to extend your Harrow home?
Get a free, no-obligation quote — or message us on WhatsApp.