How Much Does a Retaining Wall Cost in Boston? [2026 Data]

Installing a retaining wall in Boston costs $7,228 on average, but most homeowners pay between $3,930 and $11,053. Boston’s proximity to the coast and high rainfall can lead to erosion, so putting in a retaining wall is a savvy home project. Find out how much you’ll spend to install a retaining wall on your property to protect your home and landscaping.

Retaining Wall Cost Factors 

Various factors determine the cost of a retaining wall installation in Boston, Massachusetts. In addition to wall size and materials, terrain, site prep, soil type, waterproofing, and more should be considered. 

Size

The length and height of your wall have the biggest impact on price, with taller retaining walls costing more per linear foot. For example, a 2-foot-tall retaining wall costs $50 to $240 per linear foot, while retaining walls up to 6 feet high cost about $430 per linear foot.

The following table summarizes common retaining wall sizes and their average costs. Note that the lower end of the cost range is for walls 2 feet high, while the higher end of the cost range is for walls 6 feet or taller.

Materials

The type of material you choose will greatly affect what you pay. Here’s a look at the average prices for common retaining wall materials per square foot.

Material Delivery

Your contractor may charge an extra fee for material delivery. If that’s the case, expect to spend $35 to $120 per truckload of stone, brick, or concrete blocks.

Terrain

The terrain in the surrounding area impacts the cost of building a retaining wall. Boston’s proximity to the coast and high rainfall can lead to erosionAdditional labor is needed for sloped grounds, which can increase labor costs by 50% or more. In this situation, the contractor must excavate to construct step-downs or terrace the slope to accommodate a safe retaining wall. 

Site Prep

Your contractor will prep the site before building the retaining wall. This may include land clearing, land grading, and tree removal. If your wall is more than 4 feet tall, you’ll need a structural engineer to design it. Here’s what you might pay for site prep.

Drainage

All retaining walls need drainage, as their purpose is to stop erosion on a slope. There are various methods, including pipes, gravel, weep holes, and criblock designs. Several factors in Boston contribute to erosion risk, including proximity to the coast, sea-level rise, storms, and high rainfall. If you already have a retaining wall that isn’t properly draining, you may need to spring for retaining wall repair costs or a full replacement.

Expect to spend $70 to $85 per linear foot on excavation to fix drainage issues. If you’re replacing the wall, it will cost $25 to $35 per linear foot to demolish the old wall and install a new one.

Soil Type

The soil in your yard will determine the type of retaining wall you can build. Certain walls work better with certain soil types. For example, malleable clay soil may not be sturdy enough to support heavy wall materials.

In addition, rocky soil with many boulders will require your contractor to spend extra time clearing the land. It will also be more difficult to excavate, so you can expect higher labor costs across the board.

Reinforcements

Your retaining wall may need reinforcement, which could increase your material and labor costs. A hardscaping pro will add rebar either horizontally or vertically. Rebar costs around $1 to $2 per square foot. If your wall is particularly long or tall, it may also require footings with different fill materials (costs vary by material).

A structural engineer adds reinforcements when:

• The wall is taller than 4 feet

• The wall is longer or taller than average

• You’re installing a sea wall

• You live in a climate with extreme weather

Waterproofing

Waterproofing costs $2.50 to $12 per square foot and can increase the lifespan of your retaining wall. This stops water from seeping into wall joints, which can damage the structural integrity over time. Some materials (like vinyl) are more waterproof than others, so make sure to check with your contractor.

Retaining Wall Pro Costs

Costs for hiring a retaining wall pro in Boston, Massachusetts, depend on several factors, including the project scope, materials, labor rates, and installation method.

Labor

Labor is a significant part of retaining wall costs. A local hardscape contractor will charge an average of $60 to $90 per hour or $20 to $60 per square foot. Their rates will also depend on the wall’s materials and the overall complexity of the project. Interlocking retaining wall blocks or pin mechanisms are the fastest and easiest to install compared to hand-stacked limestone or I-beam retaining walls.

Permits

Though it depends on local laws, most homeowners will need a permit to build a wall taller than 4 feet. However, some walls shorter than 4 feet require a permit if they support a surcharge. For retaining walls that do need a permit, you’ll need to pay an application fee, and the permit costs increase with the valuation of the project. Always check the state building code, fees, and requirements for your particular project before starting.

Additional Pros to Consider Hiring

Depending on the specifics of your project, such as whether you need to alter landscaping or have a structural engineer design the wall, you may need to hire additional pros, including:

• Structural engineer: $340–$780

• Land clearing pro: $1,400–$6,200

• Land leveling pro: $1,000–$3,300

• Tree removal pro: $200–$2,000

• Hardscaping pro: $5,000–$18,000

Does a Retaining Wall Increase Home Value?

A high-quality retaining wall can increase your home’s value by as much as 15% and has a return on investment (ROI) of about 100% to 200%. Because Boston, Massachusetts, is a coastal city prone to sea-level rise and storms, you may see a greater ROI than in areas less at risk for flooding and erosion. A well-maintained retaining wall that adds beauty to your property and will last for decades can appeal to homebuyers in your area.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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