Summer Home Maintenance Checklist for London, Ontario Homeowners

A summer home maintenance checklist for London, Ontario should cover four things at minimum: heat and air conditioning readiness, compliance with the city's outdoor watering bylaw, storm and flood preparedness, and exterior upkeep before fall. I'm Gloria Roman, a REALTOR® with Century 21, First Canadian, and I've walked enough London buyers and sellers through home inspections to know that the homes holding their value best are the ones that got a little attention every season — not just before listing day.

Whether you're settling into a new home this summer or getting ready to sell, this checklist is built specifically around what actually affects London and Middlesex County properties: our watering restrictions, our storm patterns, and the humidity that comes off the Thames.

Key Takeaways

• London's Water By-law restricts outdoor watering to even-numbered addresses on even calendar days and odd-numbered addresses on odd calendar days from June through August, according to the City of London.
• The Middlesex-London Health Unit issued extreme heat warnings in both late June and mid-July 2026, so cooling system checks aren't optional this year.
• The City of London's Basement Flooding Grant Program covers up to 90% of eligible costs for sump pumps, backwater valves, and battery backups — money worth claiming before the next big storm, not after.
• London's resale market logged 753 sales in June 2026, with 4.6 months of inventory, according to the London and St. Thomas Association of REALTORS® — a market where well-maintained homes still stand out.
• Small, seasonal maintenance tasks protect your home's value whether you're staying put or listing in the fall.

Beat the Heat Before It Beats Your HVAC

The Middlesex-London Health Unit issued extreme heat warnings for our area starting June 29 and again on July 13, 2026, and warnings get triggered whenever daytime highs hit 31°C or higher (or the humidex reaches 40) for two consecutive days. That's exactly the kind of stretch that finds a weak air conditioner.

Before the next warning hits, change your furnace filter (it cools air too), clear debris and overgrown landscaping from around your outdoor condenser unit, and test that your thermostat is actually responding to changes. If you don't already have one, a programmable or smart thermostat pays for itself in a London summer.

If your air conditioning is more than 12-15 years old, this is also the season to start budgeting for a replacement rather than waiting for a July breakdown — HVAC contractors across Middlesex County get booked solid the moment a heat warning is issued.

Know London's Summer Watering Bylaw Before You Get a Ticket

London's Water By-law (W-8) restricts outdoor water use every summer, and the city enforces it. From June through August, homes with even-numbered civic addresses can water lawns and gardens only on even calendar days, and odd-numbered addresses only on odd calendar days. It's a simple rule, but it's one of the most common bylaw complaints I hear about from new homeowners who moved from a municipality without watering restrictions.

If you're new to London — especially if you relocated from outside Ontario — check your civic address against the calendar before you set up a sprinkler system. It's a small detail, but it's exactly the kind of local knowledge that saves new residents a headache (and a fine) in their first summer here.

Storm-Proof Your Home Before the Next Watch Is Issued

Southwestern Ontario gets its share of severe thunderstorm and tornado watches every summer, and Environment Canada's warnings page for the London-Middlesex region is worth bookmarking if you don't already check it. The practical prep work matters more than the warnings themselves:

• Clean your eavestroughs and downspouts. Make sure downspouts direct water at least six feet away from your foundation — this alone prevents a huge share of basement moisture issues in older London neighbourhoods.
• Test your sump pump. Pour a bucket of water into the pit and confirm it kicks on and drains properly. A pump that fails silently in February is a much bigger problem in a July downpour.
• Look into the City's Basement Flooding Grant Program. The City of London will reimburse up to 90% of eligible costs for flood protection work: up to $1,800 for a backwater valve, up to $4,000 to disconnect weeping tiles and install a new sump pit and pump, and up to $1,400 for a battery backup system. If your home has flooded before, or sits in an area prone to sanitary main backups, this is worth applying for before storm season peaks rather than after a claim.
• Trim tree branches that hang over your roof or sit close to power lines — a common source of storm damage across leafier, established pockets of the city.

Exterior Upkeep That Protects Your Home's Value

Summer is the easiest season to spot problems that hide under snow or fade into fall leaves. Walk the exterior of your home and look for: cracked or peeling caulking around windows and doors, soft or discoloured deck boards, gaps in siding where pests can get in, and any settling or cracking around the foundation.

None of these are urgent emergencies in July. All of them get more expensive to fix the longer they sit. If you're planning to sell in the next year, this is also exactly what a home inspector will flag — addressing it now, while the weather cooperates, is far less stressful than a scramble before a fall listing.

What London's Market Looks Like Heading Into Late Summer

If home maintenance is on your mind because you're weighing a move, here's where things stand. The London and St. Thomas Association of REALTORS® reported 753 home sales across the region in June 2026, up 1.6% from June 2025, with an average sale price of $606,614. Inventory sat at 4.6 months, and the sales-to-new-listings ratio was 41.6% — below the 45-65% range that typically signals a balanced market, which tells buyers they currently have some room to negotiate and tells sellers that presentation and pricing matter more than ever.

In a market like this, a home that's visibly well-maintained — working systems, clean gutters, no obvious deferred maintenance — genuinely stands out to buyers touring multiple properties in a weekend.

Frequently Asked Questions

When can I water my lawn in London, Ontario?
From June through August, even-numbered addresses may water on even calendar days and odd-numbered addresses on odd calendar days, under the City of London's Water By-law.

Does the City of London help pay for a sump pump?
Yes. The Basement Flooding Grant Program reimburses up to 90% of eligible costs, including up to $4,000 toward disconnecting weeping tiles and installing a new sump pit and pump.

How do I know if a heat warning is in effect in London?
The Middlesex-London Health Unit issues extreme heat warnings when forecasts show a daytime high of 31°C or more (or humidex of 40+) for two consecutive days, and posts current alerts on its website.

Should I do maintenance now if I'm planning to sell this fall?
Yes. Addressing eavestroughs, caulking, deck condition, and HVAC servicing in summer means fewer surprises during a fall home inspection — and a stronger first impression for buyers.

Is now a good time to buy or sell in London, Ontario?
With 4.6 months of inventory and a sales-to-new-listings ratio around 41.6% as of June 2026, conditions currently favour buyers who do their homework — but well-priced, well-maintained homes are still moving. I'm happy to walk you through what that means for your specific situation.

Let's Talk About Your Home This Summer

Whether you're maintaining the home you love, getting ready to list, or house-hunting across London and Middlesex County, a little seasonal attention goes a long way — for your comfort now and your home's value later. I'd love to help you think through what your property needs, or what to look for if you're buying this summer.

Call me, Gloria Roman, at (647) 883-7135, or schedule a free consultation and let's talk about your next move.