New Jersey · Cost guide · Updated September 30, 2026

What a retaining wall costs in New Jersey in 2026

A retaining wall costs $35 to $65 per square foot of wall face on average, installed, by HomeGuide's January 2026 figures. In New Jersey, a wall four feet or taller, measured from the bottom of the footing and counting every wall on the same slope, also needs a construction permit and an engineered design. Below: the numbers, a block-by-block count at a Belleville contractor's published price, and the permit, 811, sales tax and repair rules.

Price your wall with AB: 908-331-0796 Send AB your wall

AB Contracting & Design is a paid partner of LA Trusted Partners. You're always free to choose whether to hire them. The market figures on this page come from the linked sources; only the block counts use AB's price. Read the disclosure.

Segmental block retaining wall and new steps being built behind a commercial building — A segmental block retaining wall and new steps being built behind a commercial building, from AB Contracting & Design's website.

Typical installed cost: $35–$65 per sq ft of face
NJ permit trigger: 4 ft or more, from the footing
AB's block price: $40 per Sigma 8 block
Call 811: 3 to 10 business days ahead

The numbers

What a retaining wall costs, by the published data

Wall prices are quoted per square foot of wall face, length times height, installed. Two national cost guides overlap on concrete and timber and differ most on stone, where the choice of stone moves the price the most.

Installed retaining wall cost per square foot of face, by material
Material	HomeGuide	Angi
Concrete block	$15–$40	$30–$50, concrete
Poured concrete	$20–$45	$30–$50, concrete
Natural stone	$20–$95	$20–$100
Timber	$15–$30	$15–$30
Vinyl	$10–$20	$10–$15
Gabion	Not listed	$10–$40

Per sq ft of face, installed. HomeGuide, January 16, 2026; Angi, updated September 15, 2026.

Total installed retaining wall cost by length and height, HomeGuide
Wall	2 ft tall	4 ft tall	6 ft tall
10 ft long	$700–$1,300	$1,400–$2,600	$2,100–$3,900
50 ft long	$3,500–$6,500	$7,000–$13,000	$10,500–$19,500
100 ft long	$7,000–$13,000	$14,000–$26,000	$21,000–$39,000

National totals, installed. HomeGuide, January 16, 2026.

What New Jersey sources publish

No state agency publishes a retaining wall price. These are the New Jersey figures contractors and cost sites publish, each with the area it covers and the date on the page.

Published New Jersey retaining wall prices
Source	Area	Published figure	Date shown
ProMatcher	New Jersey (poured concrete city rows)	$45–$52 per sq ft	Updated September 2, 2026
Patrick Breen Masonry & Concrete	South Jersey	$35–$65 per sq ft of face, segmental; $55–$80 over 4 ft	Feb 20 (published 2026)
JWSR	Sussex County	$30–$75 per sq ft of face, most residential walls	Updated August 23, 2026
Edgescape	Monmouth County	$14,100–$24,200 for a 40 ft × 4 ft block wall, engineering and permit included	June 12, 2026

Priced on top of the wall

HomeGuide lists engineering at $500 to $2,000 or more, permits at $50 to $450, removal of an old wall at $15 to $30 per linear foot and cap stones at $5 to $15 a piece. Angi puts a structural engineer at $350 to $750 and a drainage fix at $60 to $70 per linear foot.

Labor is about half

Labor makes up 40% to 60% of the cost, by HomeGuide's figures, and HomeGuide puts the project minimum at $1,500 to $3,000. On a short wall, that minimum is spread over fewer square feet.

By the block

Counting blocks at a Belleville contractor's published price

AB Contracting & Design publishes one number for segmental walls: $40 per Cambridge Sigma 8 block, with the block included. Cambridge Pavers, based in Lyndhurst, sizes the Sigma 8 at 8 inches high by 18 inches long, and its Sigma 8 Pro Guide says each block covers one square foot of wall face, with at least one course usually buried. So the blocks in a wall are its face area plus the buried course, and the block line of a proposal is that count times $40.

The counts below are our arithmetic on those two published figures. They are not quotes, and your written proposal is the number that counts.

Sigma 8 block counts and block cost at AB Contracting & Design's $40 per block
Wall	Courses, one buried	Blocks	At $40 a block	Total block height
30 ft long, 2 ft 8 in. showing	5 courses × 20 blocks	100	$4,000	3 ft 4 in.
30 ft long, 3 ft 4 in. showing	6 courses × 20 blocks	120	$4,800	4 ft 0 in.
100 ft long, 4 ft showing	7 courses × about 66.7 blocks	about 467	about $18,670	4 ft 8 in.

Watch the 4-foot line

A wall that shows 3 feet 4 inches above the lawn is already 4 feet of block once the buried course is counted, and New Jersey measures from the bottom of the footing. That wall needs a permit and an engineered design. Settle the height with your town's construction office before the estimate, not after.

Ask what else is in the price

AB's pages say the $40 includes the block; they do not say whether these are included, so ask for each as its own line:

The compacted gravel leveling pad under the first course
Drainage stone behind the wall, the perforated drain pipe and filter fabric
Geogrid reinforcement, which Cambridge's own tables call for from 2 ft to 2 ft 8 in. showing, depending on the soil, even on flat ground
Cap and corner units
Digging, and hauling away the soil and any old wall
An engineer's design and the town's permit fee, when the wall needs them

Permits

When a retaining wall needs a permit in New Jersey

The State construction code sets one rule for every town (N.J.A.C. 5:23-2.14(g), current through August 17, 2026). You need a construction permit to build, enlarge, alter, rebuild or demolish:

A retaining wall, or a series of them, with a total height of four feet or greater. Height runs from the bottom of the footing to the top of the wall, not from the lawn.
Every wall on the same slope, added together. Two 3-foot walls stepped up one hillside count as a 6-foot wall, so terracing does not avoid the permit.
A wall under four feet that has a negative impact on a foundation. A short wall close to the house can still need a permit.

A wall that needs the permit also needs an engineered design. New Jersey's residential code ties its retaining wall section, R404.4, to this same permit trigger (N.J.A.C. 5:23-3.21, with the 2024 codes adopted August 17, 2026). The 2021 New Jersey edition requires those walls to be designed to accepted engineering practice, with a safety factor of 1.5 against sliding and overturning. Engineering plans carry the seal and signature of the engineer or architect who designed them, and when a contractor does the work, its home improvement registration number goes on the permit application (N.J.A.C. 5:23-2.15).

The code does not say whether the gravel leveling pad under a block wall counts as the footing. Ask your town's construction official before you settle on a height.

Towns add their own limits

Four Essex County examples, each from the town's own code. Check yours before you design.

Montclair: on interior lots, 4.5 ft maximum in front of the rear corner of the house and 7 ft on the rest; a licensed engineer designs any wall over 4 ft; terraced walls count as one unless 4 ft apart. Zoning height here is measured from natural grade.
West Orange: under its steep-slope standards, walls over 4 ft need a variance and an engineer's certification that the wall was built to the approved plans.
Livingston: a permit for any wall facing a street or public right-of-way; walls of 60 inches or more are topped by a fence at least 48 inches high.
Belleville: its zoning chapter calls for a construction permit showing a plot plan and the wall's location, elevation and plan, with no height stated. Confirm with the construction office.

Before you dig

Call 811 first, even as a homeowner

3 to 10 business days

New Jersey law requires notice to the One-Call system at least three and no more than ten business days before digging (N.J.S.A. 48:2-82). Dial 811 (N.J.A.C. 14:2-3.1). The notice stays valid for 45 business days while the marks are kept up.

Homeowners count

A homeowner who digs is an excavator under the rules, with the same duty to give notice (N.J.A.C. 14:2-1.1). A wall means a trench and a base, so call before the first shovel.

Hand dig near the lines

No machine within two feet of a buried line until it has been found by hand digging. Penalties run $1,000 to $2,500 a day, up to $25,000 for a related series (N.J.A.C. 14:2-6.2).

Sales tax

Do you pay sales tax on a retaining wall in New Jersey?

Not on a new wall, with the right form; yes on a repair. The Division of Taxation's bulletin for landscapers, ANJ-4, names retaining walls, with patios, walkways and driveways, as exempt capital improvements. Give the contractor a completed Certificate of Exempt Capital Improvement (Form ST-8) and you are not charged sales tax on the materials or the labor; the contractor pays the tax on the materials it buys.

Repairing walls is a taxable service: the contractor charges the 6.625% sales tax on the labor, and on the whole bill if materials and labor are not listed separately. Planting and new lawn around the wall are taxable even on a new job.

Ask for an itemized proposal

A job that repairs part of an old wall, builds a new section and replants the slope mixes exempt and taxable work. Separate lines for each keep the tax on only the part that owes it.

Repair

Repair or rebuild: reading a wall that is failing

Water is a common cause. The concrete masonry industry's best practices guide calls poor water management a frequent source of wall problems, because water adds load behind the wall and washes out the soil around it. Angi names soil that was never compacted as the most common cause of leaning.

Some movement is not always failure. The industry's segmental wall guidance says some gaps and cracked blocks are not necessarily a sign of imminent failure, especially if the wall stays in line, and sets a building tolerance of plus or minus 1.25 inches over 10 feet.

Repairs run $450 to $950, about $700 on average, by Angi's July 2026 figures; removing and rebuilding runs $6,000 to $14,000 by HomeGuide's. Rebuilding or taking down a wall of four feet or more needs a permit, and Angi warns against removing a wall without another plan in place to hold the slope.

Signs to have it looked at

The wall leans out or bulges in the middle
Blocks have separated or shifted out of line
The soil behind the wall stays wet
Wide cracks, or a top edge that is no longer straight

Close to the house? A wall under four feet still needs a permit if it has a negative impact on the foundation. See permits.

Price your wall

Call AB, or send us the wall and we pass it on

AB Contracting & Design builds retaining walls, foundation block, brick steps and other masonry from its office in Belleville, across Essex, Union and Passaic counties. Call and ask for Andrew: 908-331-0796. Phone estimates are free; an in-person estimate is $50 and comes off the contract when you sign.

Send the length, the height you want showing and what the wall will hold back. LA Trusted passes it to AB, and AB calls you back about the wall and a price.

AB's registration, 13VH11431800, was active on the State lookup when LA Trusted checked it on September 30, 2026.

AB's Trusted Partner page AB as a general contractor in Essex County AB's masonry and retaining wall page

Questions

Retaining wall cost in New Jersey: common questions

How much does a retaining wall cost in New Jersey?

A retaining wall costs $35 to $65 per square foot of wall face on average, installed, according to HomeGuide (January 16, 2026), so a 50-foot wall 4 feet tall runs about $7,000 to $13,000. New Jersey contractors publish overlapping figures: $35 to $65 per square foot of face for segmental block in South Jersey (Patrick Breen, February 2026) and $30 to $75 in Sussex County (JWSR, August 2026). A wall with a total height of four feet or more, measured from the bottom of the footing, also needs a construction permit and an engineered design in New Jersey, which adds to the cost.

How much is a 4 ft retaining wall?

Nationally, HomeGuide puts a 4-foot wall at $1,400 to $2,600 for 10 feet of length and $7,000 to $13,000 for 50 feet, and Fixr's average (January 2025) is $5,463 for a concrete block wall 25 feet long and 4 feet high. In New Jersey, 4 feet is where the rules change: a wall with a total height of four feet or greater, measured from the bottom of the footing to the top of the wall, needs a construction permit and an engineered design. Engineering runs $350 to $750 by Angi's figures and $500 to $2,000 or more by HomeGuide's.

How much does a 100 ft retaining wall cost?

HomeGuide puts 100 feet of wall at $7,000 to $13,000 at 2 feet tall, $14,000 to $26,000 at 4 feet and $21,000 to $39,000 at 6 feet. Angi's range for 100 feet is $4,000 to $36,000, with an average of $20,000. At AB Contracting & Design's published $40 per Cambridge Sigma 8 block, a 100-foot wall showing 4 feet with one course buried is about 467 blocks, about $18,670 for the block line alone, before drainage, geogrid, caps, engineering and the permit.

How much does a 30-foot retaining wall cost?

Angi puts 30 feet of wall at $1,200 to $10,800 (September 15, 2026). At AB Contracting & Design's published $40 per Cambridge Sigma 8 block, 30 feet showing 2 feet 8 inches with one course buried is 100 blocks, $4,000 for the block line. Showing 3 feet 4 inches it is 120 blocks, $4,800, and that wall is already 4 feet of block, which in New Jersey means a construction permit and an engineered design. Drainage, geogrid, caps, engineering and the permit are priced on top.

How do you calculate the cost of a retaining wall?

Multiply the face area, length times height, by an installed price per square foot, then add the items priced separately: drainage, geogrid, caps, removal of an old wall, engineering and the permit. With Cambridge Sigma 8 block it is simpler to count blocks: each block covers one square foot of face, and at least one course is normally buried below grade. AB Contracting & Design publishes $40 per Sigma 8 block with the block included, so the block count times $40 gives the block line of a proposal.

Do I need a permit for a retaining wall in New Jersey?

Yes, if the wall or series of walls has a total height of four feet or greater, or if a wall under four feet has a negative impact on a foundation (N.J.A.C. 5:23-2.14(g)). Height is measured from the bottom of the footing to the top of the wall, and all retaining walls on the same slope are added together. The rule also covers enlarging, rebuilding or demolishing such a wall. Your town may add its own zoning limits, so ask the construction office before you design the wall.

Can I build two shorter walls instead of one tall wall to avoid the permit?

Not in New Jersey. The construction code adds together the heights of all retaining walls on the same slope, so two 3-foot walls on one slope count as a 6-foot wall. Some towns go further: Montclair treats terraced walls as one wall unless the upper wall sits at least four feet back from the face of the lower one.

What is the 1/3 rule for retaining walls?

It is a rule of thumb, not a code requirement, and sources define it in different ways: that a third of the wall should be buried, that the footing or base should be sized at about a third of the wall's height, or that the soil's push should act within the middle third of the base. Nicolock, a block maker, says neither common version governs segmental block walls, which are built to the manufacturer's tables. Cambridge's Sigma 8 Pro Guide calls for at least 6 inches buried, typically one full block, on a compacted leveling pad at least 6 inches deep, and New Jersey requires an engineered design once a wall needs a permit.

What is the cheapest type of retaining wall?

Sources disagree. Vinyl and timber are the lowest per square foot in HomeGuide's January 2026 table, at $10 to $20 and $15 to $30, while Forbes calls poured concrete one of the cheapest for how long it lasts. In New Jersey, height can matter as much as material: a wall under four feet in total, counting the footing and every wall on the same slope, with no negative impact on a foundation, stays below the State permit trigger and the engineered design that comes with it. Some towns still require a permit, so check with yours.

How much does it cost to repair a retaining wall?

Angi puts retaining wall repairs at $450 to $950, about $700 on average (July 9, 2026), with bowing or leaning walls at $275 to $1,200. Removing and rebuilding a wall runs $6,000 to $14,000 by HomeGuide's figures. Angi names soil that was not compacted during construction as the most common cause of leaning, along with poor drainage. In New Jersey, repair labor is subject to sales tax, and rebuilding a wall of four feet or more needs a permit.

Do I have to call 811 before building a retaining wall in New Jersey?

Yes. New Jersey's One-Call rules treat a homeowner who digs as an excavator, with the same duty to call. Notice goes to the One-Call system at least three and no more than ten business days before digging, by dialing 811. The notice stays valid for 45 business days as long as the marks are kept up, you must hand dig within two feet of a marked line, and penalties run $1,000 to $2,500 a day.

How do I get a price from AB Contracting & Design?

Call AB at 908-331-0796 and ask for Andrew, or send the wall with the form on this page and LA Trusted passes it to AB. Phone estimates are free; an in-person estimate is $50 and comes off the contract when you sign. Count the blocks in the wall face first and you will have a close number for the block line before the visit.

Sources used on this page

All sources read on September 30, 2026.

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