12 ft by 16 ft gravel patio

A complete DIY project plan. Drawings, material math, tools and every step, researched for Pennsylvania backyards.

Difficulty: Moderate; Heavy lifting, no special skills
Build time: 2 days; Plus 3+ business days waiting on PA 811
Est. DIY cost: $550 to $1,200; Materials plus rental. Prices checked 1 October 2026, from published price guides and retailer listings. A snapshot, not a quote.
Crew: 2 people; One to haul, one to spread and pack

Project overview

A real patio, built in layers.

A flat, firm 192 square foot seating area that holds a table and chairs, drains rain away from the house, and does not turn to mud.

Size: 12 ft by 16 ft
Area: 192 square feet
Good for: A 42-inch table with 4 chairs, plus 2 Adirondack chairs and a side table
Skill level: Moderate. If you can use a shovel, a tape measure and a rented machine, you can do this.
Crew: 2 people
Time: 2 full days, after a 3-business-day wait for utility marks
Depth: 5½ inches below the finished surface

The big idea

Stone that is packed hard holds weight. Loose stone moves. So the bottom 4 inches is packed gray base stone. Only the top 1½ inches is loose, good-looking stone. A fabric layer keeps the dirt and stone from mixing over time.

The build-up, bottom to top

01Packed native soilSod and topsoil removed, then compacted.
02Woven geotextileOne 12½ by 17 ft piece.
032A base, 4 in.Two 2-inch layers, each compacted.
04Steel edging, 4 in.56 ft around the outside.
053/8 in. crushed stone, 1½ in.The surface you walk on.

Why it lasts

Two thin packed layers instead of one thick one. A plate compactor can only pack so deep at once.

Why it drains

The whole patio leans about 2 inches from the high side to the low side, so water runs off instead of sitting.

Why it stays neat

Steel edging holds the stone in and keeps the lawn out. Its top sits ½ inch above the gravel.

Before you dig, before you build

Check these first.

Call 811. It is the law in PA.

In Pennsylvania, homeowners must notify PA 811 before digging on their own property. Depth does not matter. The service is free.

1Mark your dig area with white paint or flags.
2Call 811 or file online at pa1call.org, 3 to 10 business days before you dig. Weekends and holidays do not count.
3Wait for colored marks. Hand-dig carefully within 18 inches of any mark.
4Utilities do not mark your own private lines: lamp posts, sprinklers, dog fences, lines to a shed. Find those yourself or hire a private locator.

Permits in Franklin County

Pennsylvania's building code does not require a building permit for flat, ground-level work like walks and driveways. But many towns still require a zoning or land-use permit for a patio. Waynesboro Borough lists patios as needing one. Washington Township's code office says patios need a Land Use Permit. In Antrim, Guilford, Greene or anywhere else, call your township and ask. As the owner, you can apply yourself. Some towns also count packed gravel as hard (impervious) surface, so tell them it is 192 sq ft. Check HOA rules too.

Pick the right spot

Flat-ish ground: Best spots already slope gently away from the house. Avoid spots that puddle after rain.
Room to spare: Measure 12 by 16 ft plus 2 ft around the outside for working.
Water path: The low side should drain onto lawn, not toward the house, a shed, or a neighbour's yard.
Trees: Stay out from under big trees. Digging cuts roots, and shade keeps gravel damp and mossy.
Septic and wells: Never build over a septic tank, drain field or well cap.
Delivery spot: Pick where the truck dumps 6½ tons of stone. A driveway works. Lay a tarp first. Trucks are heavy and can crack walks or rut lawn.
Wheelbarrow path: A firm path from the stone pile to the patio. Plywood over soft lawn helps.

Don’t start until

811 marks are in, and your ticket shows every utility as marked or clear
Township said yes: permit in hand, or told none is needed
Private lines found: sprinklers, lights, dog fence, propane
Stone ordered, with a delivery day and dump spot set
Compactor reserved for day 2 (and day 1 if you can)
Dirt has a home: about 4 cubic yards of it
Helper booked for two full days
Weather checked: no heavy rain on dig day

Materials

The order list.

Take this to a landscape supply yard or home centre. Stone is sold by the ton, so the maths is done below. Weights are estimates, because every quarry’s stone weighs a little different.

Item	Specification	Need	Order	Price range
Base stone	2A modified (crushed stone with fines)	≈4.4 to 4.8 tons	5 tons	$25 to $50 per ton → $125 to $250
Top stone	3/8-in. clean crushed stone (#8 / #89 at many yards)	≈1.3 to 1.5 tons	1.5 tons	$40 to $75 per ton → $60 to $115
Geotextile	Woven driveway fabric, 12½ ft wide roll	12½ by 17 ft	1 roll	12½ by 50 ft rolls: $36 to $102
Steel edging	4 in. tall, 14-gauge, 8-ft pieces with stakes	56 ft	10 pieces	Two 5-packs: $230 to $330
Landscape staples	6-in. U-pins to hold fabric	≈15	1 pack	Small cost (not priced)
Stone delivery	Most yards deliver bulk stone	1 to 2 loads	—	$50 to $150 per load → $50 to $300

Base stone math

192 sq ft × 4 in. thick = 64 cu ft = 2.37 cu yd packed
Loose stone shrinks about 15% when packed → 2.73 cu yd
× 1.45 to 1.6 tons per cu yd → 4.0 to 4.4 tons
+ 10% for low spots and spills → order 5 tons

Top stone math

192 sq ft × 1½ in. = 24 cu ft = 0.89 cu yd
× 1.4 to 1.5 tons per cu yd → 1.24 to 1.33 tons
+ 10% → order 1.5 tons

Edging

(12 + 16) × 2 = 56 ft → 7 pieces
plus overlap = 8, plus 2 spare = 10

Plan for the dirt

You will dig out about 3¼ cubic yards of soil. Dug dirt fluffs up, so expect roughly 4 cubic yards, about 25 to 30 wheelbarrow loads. Decide where it goes before you dig.

Price ranges are dated 1 October 2026. Stone ranges come from published national price guides and PA quarry listings; edging, fabric and rental from retailer and rental-shop listings. Local yards in Franklin County may be higher or lower. Call two yards for a delivered price. Sources are listed at the end.

Tools and equipment

What you’ll need.

Tools you probably have

Square shovel and round shovelSquare for flat bottoms, round for digging
Steel garden rake
Wheelbarrow
25-ft tape measure
4-ft level
Hammer or small sledgeFor stakes
Utility knifeFor cutting fabric
Garden hose with spray nozzle
Work gloves, safety glasses, ear protection, sturdy boots

Worth renting

Plate compactor (1 day)The rental-counter models we checked weigh about 160 to 185 lb. Two price lists showed $49.50 for 4 hours and $95 for 24 hours. Call your local shop.

A hand tamper cannot pack 2A stone evenly across 192 square feet. Unpacked base settles into dips and soft spots after the first heavy rain. The compactor is what makes this a patio instead of a gravel pile.

Makes it easier

Sod cutter rentalPeels grass off in strips. Saves your back on day 1.
Wooden stakes (8) and mason's string
Line levelClips on the string. A few dollars.
White marking paintRequired to mark your dig area for 811
2×4 about 8 ft longFor checking flatness and bending edging corners
Steel corner stakes for edgingCleaner 90° corners
Hacksaw or angle grinderTo trim edging

Lift it right

A plate compactor takes two people to lift into and out of a vehicle. Never lift it alone.

Protect yourself

Compactors are loud. Wear ear protection and safety glasses. Keep feet clear of the plate.

Keep dust down

Dry stone is dusty. Lightly spray the stone before you pack it. It packs better damp anyway.

Build it

Step by step.

Day 1: lay it out, dig it out

01
Mark the outline
Put a stake at each corner so the shape is exactly 12 by 16 ft and square.
1. 1Drive a stake at the first corner. Measure 16 ft along the house side and stake it.
2. 2Measure 12 ft out from each of those for the other two corners.
3. 3Measure corner to corner both ways. Nudge stakes until both diagonals are 20 ft.
4. 4Spray the outline with white paint. This is also your 811 mark.
02
Set your height strings
Strings show exactly where the top of the finished gravel will be, including the lean for drainage.
1. 1Put stakes 1 to 2 ft outside the corners so strings do not get in your way.
2. 2On the high (house) side, tie strings where you want the finished top. Ground level is usually right.
3. 3Run strings to the low side. Level them with a line level, then lower the far end 2 inches.
4. 4Run strings along the sides the same way so you have a full outline at finished height.
Good looks like
Strings are tight, do not sag, and drop about 2 in. over 12 ft (between ⅛ and ¼ in. per foot).
Common mistake
Measuring off bumpy ground instead of the string. The ground lies. The string does not.
03
Dig it out
Remove grass, roots and soft topsoil down to 5½ inches below the strings.
1. 1Cut the grass off first, with a shovel or sod cutter. Then dig the rest.
2. 2Measure down from the string every few feet. Stop at 5½ in. everywhere.
3. 3Cut the sides straight down, not sloped.
4. 4Dig by hand near any utility mark. Stay gentle within 18 inches.
Good looks like
A flat-bottomed hole that leans the same way as the strings, with clean, straight walls.
Common mistake
Digging too deep, then filling with loose dirt. Fill low spots with base stone instead.
04
Pack the dirt
Run the plate compactor over the bottom of the hole so the soil is firm before anything goes on it.
1. 1Make 2 to 3 passes in one direction, then 2 to 3 the other way.
2. 2Soft, spongy spots? Dig them out and fill with base stone, then pack.
3. 3Re-check depth from the strings. Packing lowers the soil a little.
Good looks like
You can walk on it and barely leave a footprint.

Day 2: fabric, base, edging

05
Lay the fabric
One sheet of woven geotextile keeps the base stone from sinking into the dirt over the years.
1. 1Cut one piece 12½ by 17 ft from the roll.
2. 2Lay it flat on the packed dirt and run it a few inches up the walls.
3. 3Pin it with staples so it does not shift. No wrinkles.
Good looks like
Smooth fabric touching the dirt everywhere. Narrower roll? Overlap pieces at least 12 in.
06
Base layer 1
Spread and pack the first 2 inches of 2A stone.
1. 1Dump stone on the fabric, do not drag it. Rake it about 2½ in. thick.
2. 2Spray it lightly with the hose. Damp, not muddy.
3. 3Pack: 2 to 3 passes each direction. Measure: it should be 3½ in. below the string.
Common mistake
Spreading all 4 in. at once. The machine packs the top and leaves the bottom loose.
07
Set the edging
Steel edging sits right on top of base layer 1, tight against the dirt wall.
1. 1Stand each piece on the packed layer. Its 4-in. height puts the top ½ in. above the finished gravel line.
2. 2Drive stakes per the maker's instructions. Overlap joints at least 2 in.
3. 3Bend corners around a 2×4 or use corner stakes. Check it is straight with the string.
Good looks like
Edging follows the strings, ½ in. above them, with no wobble when you push it.

Finish it right

08
Base layer 2
Spread and pack the second 2 inches inside the edging.
1. 1Rake about 2½ in. of stone, spray, and pack the same way.
2. 2Finished base should be 1½ in. below the string, everywhere.
3. 3Lay the 2×4 across the base. Fill gaps over ¼ in. and pack again.
Good looks like
Hard, smooth, and your heel will not dig in. It already looks like a gravel road.
09
Spread the top stone
Add the 3/8-inch crushed stone, the layer everyone sees.
1. 1Dump in small piles across the patio.
2. 2Rake to 1½ in. deep, even with the strings.
3. 3Make one light pass with the compactor to settle it, then rake smooth.
Good looks like
Even colour, no base showing through, edging peeking ½ in. above all around.
Common mistake
Piling it on thick to be safe. Deeper loose stone means chairs sink and wobble.
10
Backfill the outside
Lock the edging in from the lawn side.
1. 1Shovel dirt into any gap between the edging and the lawn.
2. 2Pack it with your boot or a hand tamper.
3. 3Seed or patch bare spots. Water them.
Good looks like
Lawn meets edging with no gap. Lawn is no higher than the patio on the low side, so water can get out.
11
Clean up
Leave it better than you found it.
1. 1Pull stakes and strings. Spread or haul away extra dirt.
2. 2Sweep stone off the driveway and walks. Return the compactor.
3. 3Save leftover stone in a corner of the yard for top-ups.
Good looks like
The only sign of work is a new patio.

Safety recap

Call 811 first, every time. It is the law in Pennsylvania and it is free.
Hand-dig within 18 inches of any utility mark.
Two people to lift the plate compactor. Never lift it alone.
Ear protection, safety glasses, gloves and boots.
Run the compactor outside only. Gas engines make carbon monoxide.

Quality check

Before you call it done.

Grab your tape and level. Every line should be a yes.

Right size and square: 12 by 16 ft, both diagonals 20 ft, within about ½ in.
Leans the right way: about 2 in. lower on the far side than the house side.
Passes the rain test: no standing water after 10 minutes of hose.
Flat, no dips: a 2×4 laid across shows no gap bigger than about ¼ in.
Firm underfoot: heel test, no soft spots. Chair legs do not sink in.
Even top stone: poke a ruler down in 5 spots, about 1½ in. each time.
Edging is tight: no wobble when pushed. Joints overlap. Stakes below the top.
Edging height right: top sits about ½ in. above the gravel all the way around.
No fabric showing, not at the edges, not anywhere.
Lawn edge packed: no gaps, and the low side lets water out.
No sharp edges: cut edging ends are covered or filed. No stakes sticking up.
Site cleaned up: extra dirt handled, walks swept, rental returned.

Leave it better than we found it.

Keep it looking good

A few minutes a month.

Gravel patios are low-maintenance, not no-maintenance. This is the honest list.

What	How often	What to do
Rake	Monthly, and after storms	Rake stone back from the edges and out of chair-leg ruts. Takes about 10 minutes.
Weeds	As you see them	Seeds blow in on top, so fabric under the base will not stop them all. Pull them small, after a rain, roots and all.
Leaves	Fall	Blow them off on a low setting or rake gently. Rotting leaves turn into soil, and soil grows weeds.
Edging	Every spring	Winter frost can push edging up. Walk the edge, tap loose stakes back down, and re-pack soil outside.
Top-ups	When base shows through	Stone slowly packs down and wanders off on shoes. Rake in more 3/8-in. stone to get back to about 1½ in.
Low spots	If water pools	Rake the top stone aside, add 2A base, pack it, then put the top stone back.
Drainage	After big storms	Watch where water goes. The low side should drain onto lawn. Keep mulch or soil from building up there.
Snow	Winter	Shovel with the blade held a little high, or let it melt. Ploughs and snow blowers throw stone.

Technical sources and research

How we know.

Every spec in this blueprint was checked against the sources below on 1 October 2026. Where sources disagreed, we chose the option that fits a 192 square foot residential seating area. Rules and prices change, so confirm local requirements with your township.

01Pennsylvania 811 — HomeownersFive steps to safer digging: white marks, 3 to 10 business days notice, wait for marks, utilities may not mark customer-owned lines
02Pennsylvania 811 — Homeowner FAQsHomeowners must notify on their own property; required at any depth; free for homeowners; business-day definition
03PHMSA — PA 811 Safe Digging Month proclamation (2025)PA tolerance zone is 18 in. from the outside wall or edge of a line; use prudent techniques such as hand-dug test holes
04PA Public Utility Commission — PA One CallPUC enforces PA Act 287 as amended by Act 50 of 2017
0534 Pa. Code § 403.62 (Uniform Construction Code)Owner may apply for permits; walks and driveways 30 in. or less above grade are exempt from UCC building permits if no law or ordinance is violated
06Waynesboro Borough — Do I Need a Zoning Permit?Lists building a patio as requiring a zoning permit
07LocalNews1 — Washington Township permit reminderWashington Twp. (Franklin Co.) code officer: patio construction requires a Land Use Permit under Sec. 360-120
08Plains Township, PA — Stormwater ordinanceExample of a PA municipality counting compacted gravel as impervious area
09Polycor — Hardscapes Pavers Installation GuideLocate utilities first; minimum 4 in. compacted base for patios; 4 in. maximum lifts; wet and plate-compact; slope away from buildings
10Home Depot Canada — How to Install a Paver WalkwayCompact gravel base in 2 in. layers; slope ⅛ to ¼ in. per foot away from house
11Home Depot — DIY Paver Patio and Walkway Installation (PDF)¾ in. minus with fines as base; finished grade drops ¼ in. per foot
12Oklahoma State Univ. Facilities — Pavers on Aggregate Base SSOPCompact subsoil; 4 in. compacted crusher run; stringlines for slope; PPE including hearing protection
13ICPI Interlock Design (Summer 2016)Geotextile separating compacted base from subgrade at bottom and sides; avoid wrinkles
14Geosynthetics Magazine — Separator overlap Q&ATypical geotextile separator overlap on firm subgrade is 12 to 18 in.
15Home Depot — Aluminum edging installation instructions (PDF)Top ½ in. above compacted finish grade; overlap 2 to 4 in.; bend corners around a 2×4; wear eye protection
16Colmet — Steel Edging Accessories90° corner stakes for steel edging
17Mulch Mound — Pea Gravel Patio DepthCrushed angular base under decorative layer; 4 in. compacted base is common for patios
182A Modified Stone Calculator (codingace)Planning density ≈1.45 tons per cu yd and ~15% compaction allowance for 2A
192A Stone Calculator (everycalculators)2A density range 1.4 to 1.6 tons per cu yd; varies by quarry and moisture
20Inch Calculator — Stone CalculatorCrushed stone under 2 in. weighs roughly 1.4 to 1.7 tons per cu yd
21Hello Gravel — Dump Truck Load of Rock CostBasic crushed stone $25 to $50 per ton; decorative $40 to $75 per ton; delivery $50 to $150
22Home Depot — Colmet 8 ft × 4 in. steel edging 5-packsListed $115.44 to $165.00 per 5-pack (stakes attached)
23Home Depot — 12.5 × 50 ft woven geotextile listingsListed $35.99 to $101.56 per roll
24Rosebud Rental — equipment price listPlate compactor $49.50 per 4 hr, $95 per 24 hr
25Home Depot Rental — 14 in. and 20 in. plate compactorsRental machines weigh 163 to 184 lb
26RC Engine Service — Plate compactor rentalTwo people recommended to lift the unit
27Google Search Central — Preferred sourcesOfficial deep-link format for the Preferred Sources button

Building codes and 811 rules come from official Pennsylvania sources. Construction specs come from manufacturer and industry installation guides, cross-checked against each other. Prices are a dated snapshot from retailer, rental and price-guide listings, not quotes. This blueprint is general guidance for a ground-level gravel patio; your site, soil and township rules may call for changes.

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