Maryland window replacement leads
Summit Leads supplies window replacement leads in Maryland by real-time ping/post, exclusive by default, with ZIP code filters. Maryland licenses home improvement contractors statewide under Business Regulation 8-301 (checked October 7, 2026), and its residential energy code is the 2021 IECC with amendments.
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Maryland facts for window replacement lead buyers
| Fact | Value Source |
|---|---|
| Home improvement license | Contractor license to act as a contractor; salesperson or contractor license to sell a home improvement (Business Regulation 8-301, checked October 7, 2026)Business Regulation 8-301, License required Maryland General Assembly |
| Guaranty Fund limit per homeowner | Amount paid to the contractor, up to $30,000 (MHIC, checked October 7, 2026)Maryland Home Improvement Commission (MHIC) Maryland Department of Labor |
| Residential energy code | 2021 IECC with amendments, effective May 29, 2023 (DOE, checked October 7, 2026)Building Energy Codes Program: Maryland U.S. Department of Energy |
| IECC 2021 climate zones | Zone 4A in 22 counties and zone 5A in 2 (PNNL for DOE, 2021 county data)Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) Pacific Northwest National Laboratory for the U.S. Department of Energy |
| ENERGY STAR window climate zone | Spans more than one zone (ENERGY STAR map, August 2025)ENERGY STAR Windows, Doors and Skylights Climate Zone Map (August 2025) U.S. EPA ENERGY STAR |
| Median year structure built | 1979 (ACS 5-year 2020-2024)Table B25035, Median Year Structure Built: Maryland (ACS 5-Year 2020-2024) U.S. Census Bureau |
| Housing units built before 1980 | 51.2% (ACS 5-year 2020-2024, table B25034)Table B25034, Year Structure Built: Maryland (ACS 5-Year 2020-2024) U.S. Census Bureau |
| Median home value | $419,900 (ACS 5-year 2020-2024, table B25077)Table B25077, Median Value (Dollars): Maryland (ACS 5-Year 2020-2024) U.S. Census Bureau |
Last reviewed: October 7, 2026. A summary for education, not legal advice.
Maryland licenses home improvement work statewide
This section is general information, not legal advice. It summarizes official sources as of October 7, 2026; check the current text of each rule before relying on it.
Maryland licenses home improvement contractors at the state level. Business Regulation 8-301 (checked October 7, 2026) requires a contractor license to act as a contractor in the state and a salesperson or contractor license to sell a home improvement. Its list of exceptions includes "a solicitor for a contractor who calls an owner by telephone only."
The Maryland Home Improvement Commission (checked October 7, 2026) defines home improvement to include replacement of a building or part of a building used as a residence. Its Guaranty Fund, paid into by licensed contractors, lets a homeowner recover actual losses up to the amount paid to the contractor, with a limit of $30,000, and applies only to work by licensed contractors.
The longer cancellation periods for home improvement contracts and the Stop the Spam Calls Act are covered on leads in Maryland.
The energy code for Maryland homes
This section is general information, not legal advice. It summarizes official sources as of October 7, 2026; check the current text of each rule before relying on it.
According to the DOE Building Energy Codes Program page for Maryland (checked October 7, 2026), the residential code is the 2021 IECC with amendments, adopted May 19, 2023 and effective May 29, 2023. The commercial code on the same page pairs the 2021 IECC with ASHRAE 90.1-2019.
Climate zones across Maryland counties
Most of the state shares one code zone. The DOE county guide, PNNL-33270 (2021 county data), puts 22 Maryland county-level areas in IECC zone 4A and 2 in zone 5A. The A in both labels is DOE's marker for a moist climate.
ENERGY STAR's window map is less uniform. The ENERGY STAR climate zone map (August 2025) shows Maryland crossing more than one window zone, and ENERGY STAR's climate zone finder returns the zone for each county. Buyers who sell certified products by zone can check their counties there.
Maryland homes by age and value
Half of Maryland housing units were built in 1979 or earlier: the median year built is 1979 in table B25035 (ACS 5-year 2020-2024), and table B25034 (ACS 5-year 2020-2024) shows 51.2% of units built before 1980, with 273,682 of them built in 1939 or earlier.
Home values are high. Table B25077 (ACS 5-year 2020-2024) gives a median owner-occupied value of $419,900.
How Maryland window buyers narrow requests
- Homeowner status: the homeowner is the party to the licensed contract and to any Guaranty Fund claim.
- ZIP code: buyers draw territory by ZIP code, including the Maryland side of the Washington and Philadelphia metro areas.
- Home age: the split between pre-1980 and newer housing above helps a buyer decide where to run.
- Number of windows and scope: a few units or a whole house changes the crew and the contract size.
Where buyers filter in Maryland
Three of these six metro areas extend into a neighboring state or the District of Columbia; for those, the figure is the whole metro area. All are Census Bureau estimates for July 1, 2025, and buyers can draw ZIP code territory inside or outside them.
- Baltimore-Columbia-Towson: 2,857,781 (July 1, 2025 estimate)
- Washington-Arlington-Alexandria, DC-VA-MD-WV: 6,465,724 (July 1, 2025 estimate, whole metro area)
- Hagerstown-Martinsburg, MD-WV: 315,280 (July 1, 2025 estimate, whole metro area)
- Lexington Park: 211,176 (July 1, 2025 estimate)
- Salisbury: 131,872 (July 1, 2025 estimate)
- Philadelphia-Camden-Wilmington, PA-NJ-DE-MD: 6,329,118 (July 1, 2025 estimate, whole metro area)
Source: Metropolitan and Micropolitan Statistical Area population estimates, Vintage 2025 (cbsa-est2025-alldata), U.S. Census Bureau.
Consent records for Maryland window replacement leads
Maryland window leads include the TCPATCPAThe Telephone Consumer Protection Act, the federal law that governs telemarketing calls and texts, autodialers, prerecorded voice messages and the Do Not Call Registry. Glossary consent record from the homeowner's request. Maryland has its own calling statute, listed in the state telemarketing laws table; leads in Maryland has the state summary for every Summit verticalVerticalThe industry or product category a lead belongs to, such as roofing or car accident. Glossary.
Maryland window replacement lead questions
Does a Maryland window replacement company need an MHIC license?
Business Regulation 8-301 (checked October 7, 2026) requires a contractor license to act as a home improvement contractor in Maryland, and the Commission defines home improvement to include replacement. This is general information, not legal advice.
How much can a Maryland homeowner recover from the MHIC Guaranty Fund?
Up to the amount paid to the contractor, with a limit of $30,000, according to the Maryland Home Improvement Commission (checked October 7, 2026). This is general information, not legal advice.
Which IECC edition applies to Maryland residential windows?
The 2021 IECC with amendments, effective May 29, 2023, per the DOE Maryland page (checked October 7, 2026). This is general information, not legal advice.
Can a window buyer cover the Maryland suburbs of Washington without Virginia or the District?
Yes. Buyers choose ZIP codes, so a territory can include only the Maryland counties of the Washington metro area and leave out the rest of it.
Request Maryland window replacement leads
Email us the Maryland ZIP codes you cover, your daily volume or caps and how you take delivery. ReturnReturnA buyer's request for credit on a lead that fails agreed standards, such as a disconnected number, a duplicate or a lead outside the filters. Glossary terms are agreed on the onboarding call, before you go live.
Start small, with no long-term commitment
- No long-term contract. Pause or stop at any time.
- No setup fee and no monthly fee. You pay only for leads delivered that match your filters.
- Start with a small test volume and scale when the numbers work.
- MVA and home improvement leads are exclusive by default: each lead is sold to one buyer.
- Return terms are agreed on the onboarding call, before you go live.
Or write to team@summitleads.ai. We reply by email.
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