What the Lake Forest Historic Preservation Commission Actually Approves for Roofing
If your Lake Forest property is in the historic district or designated as landmark/contributing, visible exterior changes including roofing materials require Historic Preservation Commission review. Here's what we've actually seen approved and denied across decades of HPC submissions.
Which Lake Forest properties fall under HPC jurisdiction
The Lake Forest Historic Preservation Commission has review authority over visible exterior changes on properties that are (a) within one of the city's designated historic districts, (b) individually landmarked, or (c) classified as 'contributing structures' within a historic district. Most properties in central Lake Forest east of Western Avenue and along the lakefront fall under some level of review. Specific districts include the West Park / Cherokee Road historic district, the East Lake Forest historic district, and several smaller designations. Homeowners can confirm jurisdiction by checking with the City of Lake Forest's Community Development Department or referencing the HPC's published district maps.
What requires HPC review for roofing projects
Visible exterior changes — meaning anything that affects the appearance of the home from the public right-of-way — generally require HPC review. For roofing, this includes: changing the roof material type (e.g., cedar shake to architectural shingle, or slate to synthetic slate), changing the color or visible character of an existing material (e.g., switching from a Welsh grey slate to a Vermont green slate), changing the visible flashing material (copper to aluminum, or vice versa), and certain restoration scopes that require partial replacement with new material. Like-for-like maintenance and repair using identical materials and grades typically does NOT require review — but the threshold of 'like for like' is interpreted by the Commission, and it's safer to ask than to assume.
What gets approved (in our experience across many projects)
Like-for-like material restoration: replacing aging cedar shake with new cedar shake of equivalent grade and exposure is approved consistently, often expedited if the work is documented restoration of an original specification. Approved cedar grades: Number 1 Blue Label hand-split, premium tapersawn from Watkins/Waldun/Anbrook, Class A or Class B fire-treated as appropriate. Approved slate restoration: replacement with Welsh, Vermont, or Pennsylvania slate matching the original specification, with copper flashings. Approved copper flashing replacement: new copper matching the original profile, 16-ounce minimum, with soldered seams. The Commission's general orientation favors preservation of original architectural character, which means approving restoration with original-spec materials is the path of least resistance.
What gets approved with conditions or design refinement
Synthetic slate alternatives (DaVinci, Brava, EcoStar, CertainTeed Symphony) on properties that originally specified natural slate are sometimes approved with conditions — typically requiring submission of physical sample tiles, comparison photographs to natural slate, and demonstration that the synthetic profile and color match the home's architectural character. Approval is more likely for contributing structures than for landmark properties. Class IV impact-resistant designer architectural shingles (CertainTeed Grand Manor, GAF Camelot II) replacing existing cedar shake or slate are sometimes approved on contributing structures, less often on landmark properties — and never as a substitute on properties where the historic specification is well-documented and the alternative materials don't sufficiently replicate the visual character.
What gets denied
Denied: substituting commodity asphalt architectural shingles for cedar shake or slate on landmark properties — the visual character mismatch is too significant. Denied: aluminum flashing as a substitute for original copper flashing on landmark or significantly contributing structures. Denied: changing roof color to one that doesn't reflect the home's architectural era (e.g., a bright modern color on a Tudor Revival). Denied: removing original architectural copper details (decorative finials, ornamental ridge work, copper cupolas) without like-for-like replacement. Denial doesn't always mean 'no' — sometimes it means 'submit a revised proposal' that addresses the Commission's specific concerns. We've seen multiple projects approved on a second submission after addressing the points raised in the first review.
Application requirements — what the Commission actually wants to see
Standard application package includes: completed application form with property information and project scope description, current photographs of the existing roof from multiple public-right-of-way viewpoints, proposed material specifications with manufacturer cut-sheets and product line names, physical sample submittals for cedar shake or slate (the Commission wants to handle the actual material, not just review photographs), color and texture specifications for synthetic alternatives, drawings if the project includes structural changes or significant geometric modifications, and supporting historical documentation if available (original building permits, historic photographs showing original specifications). We assemble this entire package as part of every Lake Forest HPC project — homeowners shouldn't have to navigate documentation requirements without contractor support.
Timeline — what to plan for
Lake Forest HPC meets monthly. Standard application timeline: submit at least 3 weeks before the meeting date to be on the agenda; staff review and recommendations happen in the interim; the Commission deliberates and votes at the meeting. Approval is typically issued within 5-10 days of an approving vote. For straightforward like-for-like restoration with complete documentation, projects can move from first inspection to HPC approval in 4-6 weeks. For projects involving alternative materials or design questions, expect 8-12 weeks accounting for revision-and-resubmit cycles. Storm-driven emergency replacement work where active leaks exist can sometimes get expedited interim approvals; this is handled on a case-by-case basis with city staff.
Why Commission orientation favors restoration over replacement
The Lake Forest HPC's mandate is preservation of historic architectural character — so its general orientation favors decisions that preserve original materials and original specifications. This means: restoration of existing cedar shake or slate is favored over replacement with new of the same material, which is favored over replacement with alternative materials, which is favored over replacement with materials that don't match historic specifications. For contractors who push replacement-as-default and rarely propose restoration scopes, this Commission orientation can feel obstructive. For contractors who treat restoration as a first option (which we do on heritage cedar and slate roofs), the orientation is aligned with the right answer for the home anyway. The Commission and a quality contractor want the same thing: preservation of the home's architectural value over multi-generational ownership.
What we handle as part of every Lake Forest HPC project
Application preparation, document assembly, sample procurement, photography, manufacturer cut-sheet sourcing, and submission timing. Coordinating between the homeowner, the project schedule, and the Commission's monthly meeting calendar. Attending the Commission meeting if appearance is requested. Responding to staff comments and Commission revisions. Securing the final approval letter and closeout documentation. For property owners, the HPC process should feel like one workflow item — not a months-long parallel project that has to be navigated independently of the roofing work itself. We handle it.
Get a Lake Forest project assessment
If your Lake Forest property is in the historic district or under any HPC jurisdiction, the right approach starts with the inspection — not with assumptions about what materials will or won't be approved. We walk the roof, document the existing condition, identify the historic specifications where documentation exists, and write a proposal that addresses both the technical roofing scope and the HPC application requirements. See our cedar shake, slate, and copper flashing service pages for material-specific details. Leaders Roofing Corp, founded 1996, IL Roofing Unlimited License #104.010248. Call (847) 312-2727 or use the contact form for a Lake Forest assessment.