PLUMBLINE.

Built True, Built To Last Generations

(519) 555-0182

Catch Small Cracks Before They Become Big Bills.

Explore Services

Licensed & WSIB Covered

Free Site Visits

5-Year Workmanship Warranty

4.9

Rated Locally

// Services

Everything From Footings To Flashing

Custom homes, additions, renovations and commercial fit-outs across London and Southwestern Ontario, built level, plumb and square.

General Contracting

One team for the whole job: permits, trades, inspections and a schedule we actually keep.

Custom Homes

Custom homes, infills and additions designed for Ontario winters and the way you live.

Commercial Fit-Outs

Storefronts, clinics and offices built out fast so you can open the doors sooner.

Renovations

Kitchens, basements and whole-home renovations for London's older brick houses.

Concrete & Foundations

Footings, slabs and foundation repairs poured right the first time. Everything above depends on it.

Roofing & Exteriors

Standing-seam metal roofs, siding and windows that handle snow load, lake wind and freeze-thaw.

General Contracting

One team for the whole job: permits, trades, inspections and a schedule we actually keep.

Custom Homes

Custom homes, infills and additions designed for Ontario winters and the way you live.

Commercial Fit-Outs

Storefronts, clinics and offices built out fast so you can open the doors sooner.

Renovations

Kitchens, basements and whole-home renovations for London's older brick houses.

Concrete & Foundations

Footings, slabs and foundation repairs poured right the first time. Everything above depends on it.

Roofing & Exteriors

Standing-seam metal roofs, siding and windows that handle snow load, lake wind and freeze-thaw.

General Contracting

One team for the whole job: permits, trades, inspections and a schedule we actually keep.

Custom Homes

Custom homes, infills and additions designed for Ontario winters and the way you live.

Commercial Fit-Outs

Storefronts, clinics and offices built out fast so you can open the doors sooner.

Renovations

Kitchens, basements and whole-home renovations for London's older brick houses.

Concrete & Foundations

Footings, slabs and foundation repairs poured right the first time. Everything above depends on it.

Roofing & Exteriors

Standing-seam metal roofs, siding and windows that handle snow load, lake wind and freeze-thaw.

Request a Service

// about us

Plumbline is a family-run general contractor based in London, Ontario. For eighteen years we've built and renovated homes, storefronts and community buildings across Southwestern Ontario, with our own carpenters on every job and a site lead who answers the phone.

Local Crews, Not Subcontracted Strangers

Our carpenters, concrete crew and site leads are on payroll, so the people who quote your job are the people who build it.

More About Us

// Why Choose Us

Why Property Owners Pick Plumbline

Fixed written quotes, a five-year workmanship warranty and a site lead you can text. That's the whole pitch.

Finished limestone and cedar home exterior

Trusted by homeowners, landlords and local businesses

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Average Rating

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Average Rating

man in white crew neck shirt wearing black sunglasses

man self portrait wearing gray and white collared button-up shirt near green leaf plant with white ceramic pot

1.5K+

Finished without a single callback for

defects

repairs

rework

fixes

defects

repairs

rework

fixes

defects

repairs

rework

fixes

Fully covered

One team for the whole job: permits, trades, inspections and a schedule we actually keep.

Plumbline site lead in a hard hat, smiling

Projects Completed

From one-bathroom renos to full custom homes, done right the first time

// Our Process

Four Steps, No Surprises

Every job runs the same way, from the first phone call to the final walkthrough, so you always know what happens next and what it costs.

Book A Free Site Visit

Call or send us your project details. We'll talk it through and book a time to see the site in person, usually within the week.

Measure, Plan & Price

We measure, check the structure and soil, and send a fixed written quote with a schedule. If something's unknown, we tell you up front.

Build It Right

Our own crew builds it, with a site lead who sends you photo updates every Friday and keeps the site tidy every evening.

Walkthrough & Warranty

We walk the finished job with you, fix the punch list, and hand over your five-year workmanship warranty in writing.

Measure, Plan & Price

We measure, check the structure and soil, and send a fixed written quote with a schedule. If something's unknown, we tell you up front.

Build It Right

Our own crew builds it, with a site lead who sends you photo updates every Friday and keeps the site tidy every evening.

Walkthrough & Warranty

We walk the finished job with you, fix the punch list, and hand over your five-year workmanship warranty in writing.

Book A Free Site Visit

Call or send us your project details. We'll talk it through and book a time to see the site in person, usually within the week.

Measure, Plan & Price

We measure, check the structure and soil, and send a fixed written quote with a schedule. If something's unknown, we tell you up front.

Build It Right

Our own crew builds it, with a site lead who sends you photo updates every Friday and keeps the site tidy every evening.

Walkthrough & Warranty

We walk the finished job with you, fix the punch list, and hand over your five-year workmanship warranty in writing.

Book A Free Site Visit

Call or send us your project details. We'll talk it through and book a time to see the site in person, usually within the week.

(519) 555-0182

// Featured projects

Recent Work Around Southwestern Ontario

All Projects

Before

After

August 28, 2026

London, ON

Thames Valley Farmhouse Rebuild

A tired 1950s farmhouse outside London rebuilt as a modern board-and-batten home on the same footprint, finished before the first snow.

Project Details

Before

After

August 28, 2026

London, ON

Thames Valley Farmhouse Rebuild

A tired 1950s farmhouse outside London rebuilt as a modern board-and-batten home on the same footprint, finished before the first snow.

Project Details

Before

After

August 28, 2026

London, ON

Thames Valley Farmhouse Rebuild

A tired 1950s farmhouse outside London rebuilt as a modern board-and-batten home on the same footprint, finished before the first snow.

Project Details

Before

After

June 12, 2026

London, ON

Richmond Row Café Fit-Out

A gutted downtown storefront turned into a bright café in seven weeks, handed over three days early for the owners' opening weekend.

Project Details

Before

After

June 12, 2026

London, ON

Richmond Row Café Fit-Out

A gutted downtown storefront turned into a bright café in seven weeks, handed over three days early for the owners' opening weekend.

Project Details

Before

After

June 12, 2026

London, ON

Richmond Row Café Fit-Out

A gutted downtown storefront turned into a bright café in seven weeks, handed over three days early for the owners' opening weekend.

Project Details

Before

After

April 3, 2026

St. Thomas, ON

Elgin County Library Restoration

Brick repointing, new wood windows and a rebuilt entrance for a 1912 library, fixing decades of water damage without closing the branch.

Project Details

Before

After

April 3, 2026

St. Thomas, ON

Elgin County Library Restoration

Brick repointing, new wood windows and a rebuilt entrance for a 1912 library, fixing decades of water damage without closing the branch.

Project Details

Before

After

April 3, 2026

St. Thomas, ON

Elgin County Library Restoration

Brick repointing, new wood windows and a rebuilt entrance for a 1912 library, fixing decades of water damage without closing the branch.

Project Details

Before

After

November 21, 2025

London, ON

Old South Rear Addition

A modern rear addition and cedar deck for a century brick home in Old South, opening the kitchen to the garden.

Project Details

Before

After

November 21, 2025

London, ON

Old South Rear Addition

A modern rear addition and cedar deck for a century brick home in Old South, opening the kitchen to the garden.

Project Details

Before

After

November 21, 2025

London, ON

Old South Rear Addition

A modern rear addition and cedar deck for a century brick home in Old South, opening the kitchen to the garden.

Project Details

Explore Projects

4.9

Rated Locally

What Our Clients Say

Homeowners and business owners from around London on what it was like to have us on site.

“They turned an empty unit into our café in seven weeks and finished three days early. The site lead texted us photos every Friday.”
Marcus Bell
London, ON
“The quote was the price. No surprise invoices, no mystery delays. Our kitchen has never looked better.”
Sarah Whitfield
Woodstock, ON
“The crew showed up at seven every morning and swept the driveway every night. The addition is perfect.”
Devin Carter
Stratford, ON
“We had a hard reopening date and they hit it without cutting a single corner. The result speaks for itself.”
Elena Rodriguez
Sarnia, ON
“Fair pricing and real craftsmanship. Our new build came in on budget, and the trim work is the best on the street.”
James Okafor
St. Thomas, ON
“They found the leak three other contractors missed and fixed the foundation in a weekend. Tidy, polite and thorough.”
Priya Nair
London, ON

“They turned an empty unit into our café in seven weeks and finished three days early. The site lead texted us photos every Friday.”
Marcus Bell
London, ON
“The quote was the price. No surprise invoices, no mystery delays. Our kitchen has never looked better.”
Sarah Whitfield
Woodstock, ON
“The crew showed up at seven every morning and swept the driveway every night. The addition is perfect.”
Devin Carter
Stratford, ON
“We had a hard reopening date and they hit it without cutting a single corner. The result speaks for itself.”
Elena Rodriguez
Sarnia, ON
“Fair pricing and real craftsmanship. Our new build came in on budget, and the trim work is the best on the street.”
James Okafor
St. Thomas, ON
“They found the leak three other contractors missed and fixed the foundation in a weekend. Tidy, polite and thorough.”
Priya Nair
London, ON

“They turned an empty unit into our café in seven weeks and finished three days early. The site lead texted us photos every Friday.”

Marcus Bell

London, ON

“They turned an empty unit into our café in seven weeks and finished three days early. The site lead texted us photos every Friday.”

Marcus Bell

London, ON

“The quote was the price. No surprise invoices, no mystery delays. Our kitchen has never looked better.”

Sarah Whitfield

Woodstock, ON

“The quote was the price. No surprise invoices, no mystery delays. Our kitchen has never looked better.”

Sarah Whitfield

Woodstock, ON

“The crew showed up at seven every morning and swept the driveway every night. The addition is perfect.”

Devin Carter

Stratford, ON

“The crew showed up at seven every morning and swept the driveway every night. The addition is perfect.”

Devin Carter

Stratford, ON

“We had a hard reopening date and they hit it without cutting a single corner. The result speaks for itself.”

Elena Rodriguez

Sarnia, ON

“We had a hard reopening date and they hit it without cutting a single corner. The result speaks for itself.”

Elena Rodriguez

Sarnia, ON

“Fair pricing and real craftsmanship. Our new build came in on budget, and the trim work is the best on the street.”

James Okafor

St. Thomas, ON

“Fair pricing and real craftsmanship. Our new build came in on budget, and the trim work is the best on the street.”

James Okafor

St. Thomas, ON

“They found the leak three other contractors missed and fixed the foundation in a weekend. Tidy, polite and thorough.”

Priya Nair

London, ON

“They found the leak three other contractors missed and fixed the foundation in a weekend. Tidy, polite and thorough.”

Priya Nair

London, ON

// Areas we serve

Southwestern Ontario, Covered

Based in London and working within about an hour's drive: Middlesex, Elgin, Oxford, Perth and Lambton counties.

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View All Locations

// Journal

Straight Answers From The Site

Practical advice on building, renovating and maintaining a home in Southwestern Ontario.

All Articles

GUIDE

Renovate Or Rebuild? How To Decide

Dana Kowalski

May 10, 2026

GUIDE

What An Addition Costs In London In 2026

Tom Reilly

May 22, 2026

Crack in a poured concrete basement wall

MAINTENANCE

5 Basement Cracks You Shouldn't Ignore

Tom Reilly

Apr 20, 2026

// FAQ's

Answers Before You Ask

How soon can you start?

Most renovations start within two to four weeks of signing. Custom homes and additions depend on permits, which we apply for and chase for you.

Is the site visit really free?

Yes. The visit and the written quote are free, with materials, labour and timeline broken out line by line.

What areas do you work in?

London and about an hour around it: St. Thomas, Woodstock, Stratford, Strathroy, Sarnia and everywhere in between. Not sure? Call and ask.

Is your work guaranteed?

Every job comes with a five-year written workmanship warranty, and new homes are enrolled with Tarion as required in Ontario.

How long does a renovation take?

A kitchen or bathroom usually takes three to six weeks. A full main-floor renovation is more like eight to twelve.

How does payment work?

A deposit to book, then payments tied to milestones you can see, like framing or drywall. Never a big lump up front.

// GET STARTED

Let's Build Something True

Tell us about your project and we'll set up a free site visit. You'll have a written quote within a week of us measuring.