Massachusetts Historic Commission Requirements
Massachusetts has one of the richest concentrations of historic architecture in the United States. From the 17th-century colonial homes of Plymouth and Deerfield to the Federal-era mansions of Salem and the Victorian brownstones of Boston's Back Bay, the Commonwealth's built heritage spans nearly 400 years. To protect this heritage, Massachusetts has established over 200 local historic districts under the authority of MGL Chapter 40C, each governed by a local historic district commission with the power to review and approve exterior changes to properties within their boundaries.
For homeowners, this means that replacing a roof on a property within a local historic district is not as simple as hiring a contractor and pulling a building permit. You must also obtain a Certificate of Appropriateness (COA) from your local historic district commission before any exterior work begins. This requirement applies to all exterior changes visible from a public way, including roof replacement, regardless of whether the materials are being changed or replaced in-kind. The rationale is straightforward: the commission needs to verify that the proposed work will maintain the historic character of the building and the district as a whole.
It is critical to understand the distinction between local historic districts (governed by MGL Chapter 40C) and the National Register of Historic Places. Being listed on the National Register is an honorary designation that does not, by itself, impose any restrictions on what you can do with your property unless you are using federal or state funds, tax credits, or permits that trigger Section 106 review. Local historic districts, however, carry legally binding restrictions enforced through the COA process. Many Massachusetts properties are subject to both designations, but only the local historic district imposes restrictions on private work.
The Massachusetts Historical Commission (MHC), the state agency responsible for historic preservation, provides guidance to local commissions but does not directly review individual property applications. Each local commission operates independently with its own design guidelines, meeting schedules, and approval criteria. This means the rules in Boston's Beacon Hill Architectural Commission differ from those in Cambridge, Salem, Nantucket, or any other historic district. Homeowners must work with their specific local commission to understand the requirements for their property.
Certificate of Appropriateness Process
The Certificate of Appropriateness (COA) is the formal approval document issued by a local historic district commission that authorizes exterior alterations to properties within the district. For roof replacement, the COA application requires detailed information about the proposed work, including material specifications, color samples, and in many cases, photographs of the existing roof condition. The goal is to ensure the replacement maintains the historic character of the building while using appropriate materials and methods.
COA Application Steps for Roof Replacement
- 1Pre-Application Consultation (Recommended):Schedule an informal meeting with your commission's staff or chair to discuss your project before filing. This step is optional but highly valuable. Staff can tell you which materials are likely to be approved, flag potential issues, and advise on documentation requirements. Most Massachusetts commissions welcome pre-application consultations and consider them best practice.
- 2Prepare Documentation: Gather photographs of your existing roof from all visible angles, material samples or manufacturer spec sheets for proposed materials, color samples, contractor proposal with installation details, and any historical documentation about the original roofing material (if available). For roof replacements, commissions want to see that you have researched the original material and are proposing something appropriate.
- 3Submit Application: File the COA application with your local commission. Most charge a filing fee of $25-$100 (some municipalities waive fees for residential applications). Applications are typically accepted on a rolling basis but scheduled for review at the next commission meeting, which most commissions hold monthly.
- 4Public Hearing: Your application will be reviewed at a public hearing where commission members examine your proposal, ask questions, and may hear testimony from abutters or interested parties. For straightforward roof replacements using matching materials, hearings are typically brief and approvals routine. For material changes (e.g., replacing slate with synthetic slate), expect more detailed discussion and potentially a site visit.
- 5Decision and Issuance: The commission votes to approve, approve with conditions, or deny the application. If approved, the COA is issued within 1-2 weeks. If denied, you may appeal to the Massachusetts Historical Commission or modify your proposal and reapply. Approved COAs typically remain valid for 12 months.
- 6Building Permit: After receiving the COA, you still need a standard building permit under 780 CMR. The building permit covers structural and code compliance, while the COA covers aesthetic and historic appropriateness. Both are required before work begins.
Important: Beginning roof work without a COA in a local historic district is a violation of MGL Chapter 40C. The commission can issue a stop-work order, require removal of non-approved materials (at your expense), and impose fines. Always obtain the COA before starting work.
Period-Appropriate Roofing Materials for Massachusetts Historic Homes
The roofing material requirements for historic homes depend on the building's architectural period, its specific style, and the design guidelines of your local historic district commission. Below is a comprehensive guide to the materials most commonly approved for Massachusetts historic homes, organized by material type. For general guidance on historic home roofing, see our national historic home roof replacement guide.
Natural Slate ($12.50–$25.00/sqft installed)
Natural slate is the gold standard for historic roof replacement in Massachusetts. It was the dominant roofing material for high-style homes from the mid-1800s through the early 1900s, and many Massachusetts homes still retain their original slate roofs after 100+ years. Vermont slate, quarried just across the state border, is the most commonly specified variety due to its availability, consistent quality, and range of colors (black, gray, green, purple, red).
For historic commissions, natural slate is almost always the preferred material for replacing an existing slate roof. Commissions will evaluate the proposed slate color, thickness (typically 3/16” to 1/4” for standard residential), exposure pattern, and whether the slate source matches the original where possible. Vermont unfading green or gray slate is the most commonly approved option in Massachusetts.
The primary challenge with slate replacement in Massachusetts is the shrinking pool of qualified slate installers. Proper slate installation requires specialized skills including individual slate cutting and fitting, copper flashing fabrication, and understanding of traditional slate headlap patterns. In the Boston metro area, expect wait times of 4-8 weeks for experienced slate crews.
Standing Seam Copper ($18.00–$35.00/sqft installed)
Copper roofing has been used on Massachusetts buildings since the colonial era, with Paul Revere's copper works providing material for some of Boston's earliest metal roofs, including the Massachusetts State House dome. Copper is approved by nearly all Massachusetts historic commissions for buildings where metal roofing is historically appropriate, including Federal-era buildings, public and institutional structures, and as accent roofing on dormers, bays, and porches of Victorian-era homes.
The distinctive green patina that develops on copper over 15-25 years is considered a desirable characteristic by historic commissions. New copper installations appear bright initially, weathering through brown to the characteristic green. Some commissions require pre-patinated copper for immediate visual compatibility. Copper roofing lasts 70-100+ years, making it a true lifetime investment despite the high upfront cost.
Terne-Coated Steel ($14.00–$22.00/sqft installed)
Terne-coated stainless steel (TCS) is a modern alternative to traditional terne (lead-tin coated steel) that is widely approved by Massachusetts historic commissions. TCS provides the matte, weathered gray appearance of traditional terne metal roofing without the environmental concerns of lead. It is particularly appropriate for 18th and 19th-century buildings where flat-seam or standing-seam metal roofing was historically used. TCS weathers to a natural gray patina within 2-3 years and lasts 60-80 years. Many commissions prefer TCS over painted steel because it ages more naturally and does not require periodic repainting.
Wood Shakes and Shingles ($7.00–$14.00/sqft installed)
Wood was the most common roofing material in colonial Massachusetts, with white pine and cedar shingles used extensively from the 1600s through the mid-1800s. Historic commissions may require wood shingles or shakes for colonial, Cape Cod, and saltbox homes where wood was the original material. Eastern white cedar and red cedar are the most commonly specified species.
The primary concern with wood roofing in Massachusetts is fire resistance. Under 780 CMR, wood shingles must be fire-retardant treated to achieve a minimum Class B fire rating, and some municipalities require Class A. This adds approximately $1.50-$3.00 per square foot. Additionally, wood roofing in Massachusetts's humid climate requires more frequent maintenance, including periodic cleaning to prevent moss, lichen, and algae growth. Properly maintained cedar shingles last 20-30 years in Massachusetts, while cedar shakes can last 25-40 years.
Synthetic Slate ($8.00–$15.00/sqft installed)
Synthetic slate products from manufacturers like DaVinci Roofscapes, EcoStar (Majestic Slate), and Brava Roof Tile have gained increasing acceptance from Massachusetts historic commissions over the past decade. These products are made from recycled rubber and plastic composites molded to replicate the appearance, texture, and profile of natural slate. They weigh significantly less (2-3 lbs/sqft vs. 7-10 lbs/sqft), eliminating the need for structural reinforcement on many older homes.
Commission acceptance varies widely. Some strict districts (Beacon Hill, Nantucket) do not accept synthetic materials. Others (parts of Cambridge, Worcester, Springfield) have approved synthetic slate on a case-by-case basis. If considering synthetic slate, request a pre-application meeting with your commission and bring physical samples for review. The commission will evaluate the material's visual fidelity at the typical viewing distance from the street.
Historic District Rules by Massachusetts Community
Each Massachusetts historic district operates under its own design guidelines, and the strictness of enforcement varies significantly. Below is an overview of the roofing requirements in several of the Commonwealth's most prominent historic districts.
Boston — Beacon Hill
Governed by the Beacon Hill Architectural Commission (BHAC), one of the strictest historic commissions in the country. Slate roofing is required for most properties. Copper flashings and gutters are strongly preferred. Synthetic materials are generally not approved. The BHAC reviews color, pattern, and installation details closely. Flat roof sections on row houses may use membrane roofing where not visible from public ways. Application fees are modest ($50-$75), but the review process is thorough.
Cambridge
The Cambridge Historical Commission oversees multiple local historic districts including Old Cambridge, Mid Cambridge, and Half Crown-Marsh. Guidelines are moderately strict, requiring materials compatible with the building's period and style. Slate is preferred for 19th-century homes but architectural asphalt shingles may be approved for less prominent buildings or rear-facing roof slopes. The commission has accepted synthetic slate on a case-by-case basis. Cambridge offers a streamlined review process for in-kind replacements.
Salem
Salem's Historic Commission oversees the McIntire Historic District and the Derby Waterfront district. Given Salem's exceptional concentration of 17th, 18th, and 19th-century architecture, the commission is experienced with a wide range of historic roofing materials. Wood shingles are approved for First Period (pre-1725) homes. Slate is required for Federal and Victorian-era properties. The commission is generally receptive to well-documented proposals and offers helpful pre-application guidance.
Nantucket
The Nantucket Historic District Commission (HDC) governs the entire island, which is designated as a National Historic Landmark. Nantucket has some of the most restrictive roofing requirements in Massachusetts. Cedar shingles (weathered gray) are required for most residential properties. Slate is approved for certain building types. Standing seam metal and synthetic materials are generally not approved for residential use. Reviews can take 4-6 weeks due to the volume of applications on the island.
Concord & Lexington
Both towns maintain historic districts centered on their Revolutionary War-era town centers. Guidelines are moderate, with an emphasis on maintaining the New England colonial character. Wood shingles and slate are preferred for colonial-era homes. Architectural shingles in muted earth tones may be approved for less prominent properties. Both commissions are generally cooperative and practical.
Cost Premium for Historic Roof Replacement in Massachusetts
Replacing a roof on a historic home in Massachusetts costs significantly more than a standard roof replacement due to material requirements, specialized labor, structural considerations, and the administrative costs of the COA process. Understanding where the premium comes from helps you budget accurately and make informed decisions about material choices.
| Cost Factor | Standard Roof | Historic Roof | Premium |
|---|---|---|---|
| Materials (1,800 sqft) | $5,400–$10,800 | $14,400–$45,000 | +$9,000–$34,200 |
| Labor (specialized) | $4,000–$7,200 | $6,000–$14,400 | +$2,000–$7,200 |
| Structural reinforcement | Rarely needed | $2,000–$8,000 | +$2,000–$8,000 |
| COA process | N/A | $200–$500 | +$200–$500 |
| Copper flashing | $500–$1,200 | $1,500–$4,000 | +$1,000–$2,800 |
| Total (1,800 sqft typical) | $9,500–$18,000 | $22,500–$75,000+ | +$13,000–$57,000 |
The wide cost range reflects the spectrum of historic home requirements. A home in a moderately regulated district where architectural shingles are approved will fall toward the lower end. A Beacon Hill brownstone requiring natural Vermont slate with copper flashings and ornamental copper ridgecap will fall toward the upper end. Most Massachusetts historic roof replacements land in the $25,000-$50,000 range for a typical 1,800-square-foot roof area.
Tax Credits and Financial Incentives for Historic Roof Replacement
Massachusetts offers some of the strongest historic preservation tax incentives in the country, which can significantly offset the cost premium of replacing a roof on a historic home. These programs are designed to encourage property owners to maintain the historic character of their buildings by providing meaningful financial relief.
Massachusetts Historic Rehabilitation Tax Credit (MHRTC)
The MHRTC provides a state income tax credit of up to 20% of qualified rehabilitation expenditures for certified rehabilitation projects on income-producing properties. For a $50,000 historic roof replacement, this could return up to $10,000 in state tax credits. The program is administered by the Massachusetts Historical Commission and requires that the work meet the Secretary of the Interior's Standards for Rehabilitation. The minimum project expenditure is $5,000, and the credit is awarded through a competitive application process with annual funding caps.
While primarily for income-producing properties, owner-occupied residential properties can qualify if a portion generates rental income (such as a two-family historic home where one unit is rented). The credit is transferable, meaning property owners who cannot fully use it can sell the credit to other Massachusetts taxpayers.
Federal Historic Tax Credit (HTC)
The federal HTC provides a 20% income tax credit for certified rehabilitation of National Register-listed buildings used for income-producing purposes. Massachusetts homeowners can potentially combine the federal and state credits for up to 40% total tax credit coverage on qualifying projects. The project must be reviewed and approved by the National Park Service through a three-part application process.
Local Property Tax Incentives
Several Massachusetts municipalities offer property tax abatements or exemptions for historic preservation work through Community Preservation Act (CPA) funding. Under MGL Chapter 44B, municipalities that have adopted the CPA can use funds for historic preservation, including grants to property owners for rehabilitation work. Communities like Nantucket, Cambridge, and Plymouth have active CPA programs that have funded historic roof restorations. Check with your local CPA committee or historic commission.
National Register vs. Local Historic District: Key Differences
Understanding the difference between National Register listing and local historic district designation is essential because the two have fundamentally different implications for your roofing project. Many Massachusetts homeowners confuse the two, leading to either unnecessary anxiety or costly violations.
| Aspect | National Register | Local Historic District (40C) |
|---|---|---|
| Authority | Federal (National Park Service) | Local (Municipal Commission) |
| Restrictions on private work | None (unless using federal funds/credits) | Yes (COA required for exterior changes) |
| Roof replacement approval | Not required | Required (Certificate of Appropriateness) |
| Tax credit eligibility | Yes (federal and state) | May qualify through CPA funds |
| Enforcement | Only for tax credit projects | Stop-work orders, fines, required removal |
The bottom line: if your property is in a local historic district (check with your town clerk or the Massachusetts Historical Commission's MACRIS database), you need a COA before replacing your roof. If your property is only on the National Register and not in a local district, you can proceed with standard permitting.
Massachusetts Roofing Material Pricing (2026)
Below are current 2026 installed costs for all roofing materials available through our pre-vetted Massachusetts contractor network. Historic home projects will typically use slate, copper, or wood materials in the higher price ranges. Enter your address above for a personalized estimate.
Historic home note: Historic roof replacements often require additional costs not reflected in per-square-foot pricing above, including copper flashings ($1,500-$4,000), structural reinforcement ($2,000-$8,000), ornamental details, and the COA process.
Compare Quotes from Historic Home Roofing Specialists
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Related Guides
Historic Home Roof Replacement (National Guide)
General guidance on replacing roofs on historic homes across the US.
Roof Replacement Cost in MA (2026)
Complete pricing guide for all 8 roofing materials across 30+ MA cities.
Massachusetts Roofing Building Codes (780 CMR)
Building code requirements for all roof replacements in Massachusetts.
Slate Roofing in Massachusetts
Dedicated guide to slate roofing costs and contractors in MA.
Cedar Shake Roof Cost Guide
Complete guide to wood shake roofing costs and installation.
Historic Home Roof Replacement FAQ
Do I need historic commission approval to replace my roof in Massachusetts?
If your property is located within a local historic district established under MGL Chapter 40C, you must obtain a Certificate of Appropriateness from your local historic district commission before replacing your roof. This applies to any exterior change visible from a public way. Properties listed on the National Register but NOT in a local historic district generally do not need commission approval unless they are using federal or state tax credits. Contact your city or town clerk's office to determine if your property is in a local historic district.
What roofing materials are allowed on historic homes in Massachusetts?
Allowed materials vary by historic district and the specific period of your home. Most commissions require materials that match the original or are historically appropriate. Natural slate is almost universally approved for pre-1900 homes. Standing seam copper or terne-coated steel is approved for certain styles. Some commissions now accept high-quality synthetic slate that replicates the appearance of natural materials. Standard asphalt shingles are often restricted in strict districts like Beacon Hill and Nantucket.
How much more does it cost to replace a roof on a historic home in Massachusetts?
Historic home roof replacement typically costs 30-100% more than standard replacements. A standard 1,800 sqft roof with architectural shingles costs $9,500-$18,000 in MA. The same size roof requiring natural slate costs $22,500-$45,000+. The premium comes from mandated materials (slate at $12.50-$25.00/sqft vs. shingles at $4.50-$8.50/sqft), specialized installers ($10-$25/hr more), and the Certificate of Appropriateness process ($200-$500 in fees plus 2-8 weeks of review).
Are there tax credits for replacing a historic home roof in Massachusetts?
Yes. The Massachusetts Historic Rehabilitation Tax Credit provides up to 20% of qualified rehabilitation expenditures for income-producing properties. The federal Historic Tax Credit provides a 20% income tax credit for certified rehabilitations of National Register-listed properties. Some municipalities also offer property tax abatements through Community Preservation Act funding. All tax credits require that work meets the Secretary of the Interior's Standards for Rehabilitation.
Can I use modern roofing materials on a historic home in Massachusetts?
It depends on your local historic commission. Some commissions now accept synthetic slate products (DaVinci, EcoStar) that closely replicate natural materials. These must typically pass a visual review and some districts require sample installation. Standard asphalt shingles are generally not approved in strict historic districts. Schedule a pre-application meeting with your commission to discuss material options before investing in a full application.
How long does the Certificate of Appropriateness process take in Massachusetts?
The process typically takes 2-8 weeks from application to approval. Most commissions meet monthly. Steps include: application submission with material samples (1 week to prepare), staff review (1-2 weeks), public hearing at a commission meeting, and certificate issuance if approved (1 week). If modifications are required, add 4-6 weeks. Some communities offer expedited review for straightforward replacements using matching materials. Emergency repairs may qualify for temporary approval.