The Executive Summary
Unlike other North Shore communities, Lake Forest requires Building Review Board approval for most garage projects. If your property lies within one of five National Register historic districts, you'll also need Historic Preservation Commission review. Architectural excellence isn't optional here — it's mandated by ordinance. Continue reading for the complete approval process.
Lake Forest isn't like other suburbs. Founded in 1857 to support what would become Lake Forest College, this lakefront community developed as an enclave of architect-designed estates, carefully planned neighborhoods, and a level of architectural standards that persists to this day.
That history shapes everything about building a garage here. Where other communities simply require a permit, Lake Forest demands architectural harmony. The Building Review Board — established in 1962 — reviews virtually every garage project to ensure it complements both your home and the neighborhood character.
This isn't bureaucracy for its own sake. It's why Lake Forest remains one of the most beautiful and valuable communities in Illinois, with median home values exceeding $1.1 million. That same rigor protects your investment.
Having navigated Lake Forest's approval process on estate properties from East Lake Forest's lakefront to the historic homes near Market Square, we've learned exactly what the Building Review Board expects and how to deliver it. This guide covers real costs, the approval timeline, and what distinguishes a successful Lake Forest garage project from one that stalls in review.
What Sets Lake Forest Apart
- Building Review Board approval: Nearly all garage projects require BRB review. The Board meets the first Wednesday of each month at 6:30pm in City Hall. Your project's architectural design, site plan, materials, and neighborhood compatibility all face scrutiny.
- Historic district considerations: Lake Forest has five National Register historic districts. If your property falls within one, the Historic Preservation Commission — not the Building Review Board — handles your review. Different process, equally rigorous standards.
- Building Scale Ordinance: Lake Forest limits garage square footage based on your lot size. Exceeding the formula requires a variance. This isn't negotiable — even beautiful designs get rejected if they exceed scale limits.
- Residential Design Guidelines: The City publishes formal design guidelines that the Board uses to evaluate projects. Understanding these before you design saves months of revisions.
- Strict permit timelines: Once issued, work must begin within 90 days and complete within one year. Lake Forest enforces these deadlines.
- Lake County jurisdiction: Unlike Cook County suburbs, Lake Forest operates under Lake County codes and permitting systems.
Lake Forest Garage Costs: The Reality
Lake Forest's median home value exceeds $1.1 million. Many properties — particularly near the lake or in estate areas — sell for $2-5 million or more. Garage construction must match these values, both in design quality and execution.
| Project Type | Dimensions | Quality Build | Estate Grade |
|---|---|---|---|
| 2-Car Detached | 22' x 24' | $55,000-$75,000 | $75,000-$95,000 |
| 2-Car Attached | 22' x 24' | $50,000-$68,000 | $68,000-$88,000 |
| 3-Car Detached | 32' x 24' | $78,000-$98,000 | $98,000-$125,000 |
| Carriage House Style | 24' x 28' | $90,000-$115,000 | $115,000-$145,000 |
Quality build meets Lake Forest standards: architecturally appropriate design, materials matching your home, proper landscaping integration, insulated construction, quality doors with smart openers, and full electrical including EV charging capability.
Estate grade exceeds standards: custom architectural detailing, premium materials (real stone, copper gutters, slate or cedar roofing), finished interior suitable for collector vehicles, climate control, and enhanced landscaping with mature plantings.
Why Lake Forest Costs More
Several factors drive Lake Forest garage costs above neighboring communities:
- Architectural design requirements: The Building Review Board expects professional architectural drawings that demonstrate neighborhood compatibility. Budget $5,000-$15,000 for architect fees alone.
- Material standards: Vinyl siding won't pass review on most Lake Forest properties. Expect to match your home's materials — whether that's stone, brick, stucco, or premium wood siding.
- Scale and proportion: Lake Forest garages often need to be larger to complement estate-scale homes, but the Building Scale Ordinance may limit size. Navigating this tension requires skilled design.
- Landscaping integration: The Board reviews site plans holistically. Your garage project likely includes landscape architecture to properly integrate the structure.
- Longer approval timelines: Board review adds weeks to the process. Carrying costs and contractor scheduling complexity add to overall expense.
Understanding the Building Scale Ordinance
Lake Forest limits total building square footage — including garages — based on lot size. The formula varies by zoning district, but generally:
Maximum garage SF = Base allowance + (Lot SF × Multiplier)
For most residential lots, this translates to garage allowances between 600-1,200 square feet depending on property size. Garages exceeding the formula require a variance from the Building Review Board, which adds complexity and uncertainty.
Before designing, obtain a Building Scale Calculation from Community Development to understand your specific limits.
The Approval Process: Two Paths
Your approval path depends on your property's location. Lake Forest operates two distinct review bodies:
Building Review Board (Most Properties)
Jurisdiction: All properties OUTSIDE designated historic districts.
Meets: First Wednesday of each month, 6:30pm, City Council Chambers (220 East Deerpath)
Reviews: New garage construction, demolition of existing structures, architectural design, site plans, exterior lighting, landscaping, and building scale variance requests.
What they evaluate: Does your garage harmonize with Lake Forest's unique character? Is the design compatible with your neighborhood? Do materials and proportions complement surrounding structures?
Historic Preservation Commission (Historic Districts)
Jurisdiction: Properties within designated National Register historic districts or individually landmarked properties.
Lake Forest has five National Register districts:
If your property falls within these districts, contact the Historic Preservation Commission BEFORE beginning design. Standards are stricter, and the Commission specifically evaluates historic compatibility.
The Review Timeline
Plan for a longer process than you'd experience in other North Shore communities:
- Weeks 1-3: Hire architect, develop preliminary design, obtain Building Scale Calculation from Community Development.
- Weeks 4-6: Refine design based on scale limits and Residential Design Guidelines. Prepare complete application package.
- Week 7: Submit application by published deadline (typically 3 weeks before meeting). Application must include site plan, elevations, materials board, landscaping plan, and Building Scale Workbook.
- Week 8-10: Staff review. City may request additional information or clarification.
- Week 10: Board meeting. Present project, answer Board questions, receive approval, conditional approval, or revision requests.
- Weeks 11-13: If approved, submit building permit application. Permit review and issuance.
- Weeks 14-26: Construction (12-16 weeks for most projects).
⚠️ Critical Deadlines
Lake Forest enforces permit timelines strictly. Once your permit is issued, construction must begin within 90 days. The entire project must be completed within one year of permit issuance. Extensions require formal application and are not guaranteed. Plan your project timeline carefully — starting in late fall with a one-year deadline means winter delays could create compliance problems.
Lake Forest Neighborhoods: Design Expectations
Architectural expectations vary significantly across Lake Forest's diverse neighborhoods:
East Lake Forest (Lakefront Estates)
The most prestigious and demanding area. Homes here range from $2 million to $10 million+. Many properties feature architect-designed estates from the 1890s-1940s in Italian Villa, Tudor, Georgian, and French Country Manor styles. Garages must read as carriage houses or estate outbuildings — not suburban utility structures. Expect the highest level of Board scrutiny and the largest budgets ($90,000-$145,000+ typical).
Deerpath & Market Square Area
Historic downtown area near Lake Forest's famous Market Square (itself a National Historic Landmark). Mix of historic homes and well-maintained 20th century construction. Strong neighborhood character requires careful design integration. Georgian and Colonial styles predominate. Moderate to high budgets ($65,000-$100,000 typical).
West Lake Forest
Includes areas near Conway Farms Golf Club. Mix of established estates and newer construction. More design flexibility than historic areas, but Building Review Board still expects excellence. Contemporary designs may be appropriate depending on context. Moderate budgets possible ($55,000-$90,000 typical).
Knollwood & Old Elm Areas
Established neighborhoods with mature trees and well-landscaped properties. Strong emphasis on blending new construction with existing landscape. Garage placement and landscaping often matter as much as architecture. Moderate budgets ($60,000-$95,000 typical).
Matching Lake Forest's Architectural Heritage
- Tudor homes: Consider steeply pitched garage roofs, half-timbering details, arched doorways, and brick or stone materials. Carriage house proportions work well.
- Georgian/Colonial: Symmetry matters. Center the garage door(s), use appropriate window proportions, match cornice and trim details to the main house.
- French Country Manor: Natural stone or stucco exteriors, hipped roofs, arched openings, copper or standing-seam metal accents.
- Italian Villa: Low-pitched tile roofs, stucco walls, arched openings, loggia or covered walkway connections where possible.
- Contemporary: Clean lines, material consistency with main house, restrained detailing. Works in newer areas but requires careful Board presentation.
Selecting a Lake Forest Contractor
Lake Forest projects demand contractors who understand both high-end construction AND the approval process. Technical skill alone isn't sufficient.
Essential Qualifications
- Lake Forest/North Shore experience: Ask specifically about projects that went through Building Review Board approval. Experience navigating the process prevents costly design revisions.
- Architect relationships: The best Lake Forest contractors work with architects experienced in Board presentations. These relationships streamline the approval process.
- Premium construction capability: Lake Forest expects real materials — stone, brick, premium wood, copper, slate. Your contractor must have craftsmen skilled in these materials.
- Insurance appropriate to values: With projects routinely exceeding $100,000, ensure your contractor carries adequate liability coverage ($2M+ recommended).
- References from comparable projects: Ask for contacts from Lake Forest homeowners, not just general North Shore references. The community has specific expectations.
Red Flags in Lake Forest Context
Beyond standard warning signs, watch for contractors who dismiss the Building Review Board as "just a formality," who propose designs before understanding your property's scale limits, who suggest vinyl or other materials inappropriate for Lake Forest contexts, or who have never successfully completed a Board-approved project.
Two Recent Lake Forest Projects
East Lake Forest: 1920s Tudor Estate
The situation: Original carriage house had been converted to living space decades earlier. Owners needed a new 3-car garage for vehicle collection while respecting the property's historic character within the East Lake Forest National Register district.
The solution: New 32' x 28' detached garage designed as period-appropriate carriage house. Half-timbering details matching main residence, steeply pitched cedar shake roof, carriage-style doors with period hardware, stone foundation matching estate walls. Interior finished with climate control for vehicle preservation. Required Historic Preservation Commission approval due to district location.
Timeline: 5 months from initial design to completion. Two Commission meetings required — first for preliminary review, second for final approval.
West Lake Forest: Contemporary Integration
The situation: 1990s contemporary home had only a 2-car attached garage. Growing family needed additional garage bay plus workshop space, but Building Scale limits constrained options.
The solution: 24' x 26' detached garage designed in contemporary style matching home's clean lines. Flat roof with standing-seam metal, cement board siding matching home, oversized windows for natural light in workshop area. Careful site positioning minimized visual impact from street. Building Review Board approved after one revision addressing landscape screening.
Timeline: 4 months from design to completion. Single Board meeting with conditional approval pending revised landscape plan.
Return on Investment in Lake Forest
Lake Forest's premium real estate market rewards quality garage construction handsomely:
With median home values at $1.1 million and many properties selling for $2-5 million, buyers in this market expect appropriate garage facilities. Homes with inadequate or poorly designed garages face significant discounts. Conversely, well-designed garages that complement the property's architecture add substantial value.
Based on recent sales data, quality garage additions in Lake Forest add $80,000-$140,000 to property values. For a $90,000 investment, that's potentially 90-155% value capture — exceptional ROI that also provides daily utility.
The key is Building Review Board-quality design and execution. A garage that merely "passes" approval adds less value than one the Board praises. In Lake Forest, the approval process itself signals quality to future buyers.
Lake Forest Garage Addition: Essential Questions
What does garage construction cost in Lake Forest?
Lake Forest garage projects typically range from $50,000-$130,000 depending on size, design complexity, and finish level. A quality 2-car detached garage runs $55,000-$75,000, while estate-grade carriage house designs can exceed $115,000. These higher costs reflect Lake Forest's architectural standards, premium material requirements, and the design work needed for Building Review Board approval.
What is the Building Review Board and do I need their approval?
The Building Review Board is a seven-member body of Lake Forest residents established in 1962 to protect the community's architectural character. If your property is outside a designated historic district, nearly all garage projects require BRB approval. The Board evaluates architectural design, site plans, materials, and neighborhood compatibility. They meet the first Wednesday of each month at City Hall.
How long does the Lake Forest approval process take?
Plan for 4-6 months from initial design to project completion. The breakdown: 3-6 weeks for architectural design, 3-4 weeks for application preparation and submittal, 3-4 weeks for staff review and Board meeting, 1-2 weeks for building permit issuance, and 12-16 weeks for construction. Projects requiring revisions or variance requests take longer.
Is my property in a historic district?
Lake Forest has five National Register historic districts: East Lake Forest (lakefront estates), Vine/Oakwood, Green Bay Road Estates, West Park, and Deerpath Hill Estates. Properties in these districts require Historic Preservation Commission approval rather than Building Review Board approval. Contact Community Development at (847) 810-3500 to verify your property's status before beginning design.
What is the Building Scale Ordinance?
Lake Forest limits total building square footage (including garages) based on lot size. The formula varies by zoning district but typically allows 600-1,200 square feet for garages depending on property size. Exceeding your limit requires a variance from the Building Review Board. Before designing, request a Building Scale Calculation from Community Development to understand your specific allowance.
Do I need an architect for my Lake Forest garage?
While not legally required for all projects, architect involvement is practically essential in Lake Forest. The Building Review Board expects professional-quality drawings demonstrating architectural merit and neighborhood compatibility. Architects familiar with Lake Forest can navigate the Residential Design Guidelines and present projects effectively. Budget $5,000-$15,000 for architectural services.
What materials are acceptable in Lake Forest?
Lake Forest expects garage materials to match or complement your home. Acceptable materials typically include brick, natural stone, stucco, premium wood siding, and quality fiber cement (in appropriate contexts). Vinyl siding is generally not acceptable. Roofing should match your home — architectural shingles, cedar shake, slate, or standing-seam metal depending on style. The Board specifically reviews materials as part of approval.
How strict are permit timelines?
Very strict. Once your Lake Forest building permit is issued, work must begin within 90 days and complete within one year. The City enforces these deadlines. Extensions require formal application and are not guaranteed. Plan your project timeline carefully — permits issued in late fall face winter construction challenges within the one-year window.
Can I appeal a Building Review Board decision?
Yes. Building Review Board decisions can be appealed to the City Council. Appeals must be filed with the City Clerk within 14 calendar days of the Board's final action. However, appeals are rarely successful unless the Board made a procedural error. The more practical approach is working with the Board's feedback to revise and resubmit your design.
What ROI can I expect in Lake Forest?
Quality garage additions typically add $80,000-$140,000 to Lake Forest property values, representing 90-155% cost recovery on most projects. The key is achieving design excellence — garages that earn Board praise add more value than those that merely pass. In Lake Forest's $1M+ market, buyers expect appropriate garage facilities and discount homes that lack them.
Moving Forward with Your Lake Forest Project
Building a garage in Lake Forest requires more planning, design excellence, and approval navigation than typical suburban projects. But this rigor exists for good reason — it's what makes Lake Forest one of Illinois' most beautiful and valuable communities.
The keys to success: understand whether your property requires Building Review Board or Historic Preservation Commission review, respect Building Scale limitations from the start, invest in quality architectural design, select materials appropriate to your home's character, and work with contractors experienced in Lake Forest's expectations.
Contact Assembly Squad to discuss your Lake Forest property. We'll help determine which review body has jurisdiction, evaluate your Building Scale allowance, discuss design approaches that align with Board expectations, and provide a realistic budget and timeline. Complimentary consultation — no obligation.