Alpharetta Hardscape Timeline on a Quarter-Acre Lot — 4 Weeks vs 8 Weeks

On a quarter-acre Alpharetta lot with a pool, a 700-square-foot deck, and a retaining wall, the spread between the fastest and slowest builds we have run is 28 business days versus 56 — a swing of roughly four full weeks driven almost entirely by HOA review speed, permit sequencing, and how many trade handoffs the schedule absorbs.

That four-week gap is not theoretical. It is the difference between pouring a patio footing on the Monday of Week 3 and pouring it on the Monday of Week 6. It is the difference between swimming by Memorial Day and swimming on the Fourth of July. Every time we sit at a kitchen table in Windward, Deerfield, or Country Club of the South, the first question after budget is the same — how long will this take — and the honest answer depends on four variables the homeowner can actually control.

This post walks through the 4-week lane and the 8-week lane side by side, phase by phase, on a representative quarter-acre Alpharetta backyard: pool, 700 sqft pool deck, and one 28-inch retaining wall to handle the grade change typical of the GA-400 corridor ridge-and-valley lots. You will see where time is won, where it is lost, and which decisions your designer needs to have locked before the permit goes in.

Week 0: The Decisions That Set Your Lane Before a Shovel Moves

The clock does not start at excavation. It starts at the design freeze. On projects that finish in four weeks, the homeowner makes six decisions before we submit anything to the City of Alpharetta Community Development office at 2 Park Plaza: pool shape and depth, deck square footage, coping material, paver pattern, retaining wall material, and drainage terminus. On projects that slide to eight weeks, three or four of those decisions stay open while the permit is already in review, which means every change triggers a re-submission.

The six-decision checklist sounds obvious until you price it. A swap from travertine coping to bluestone after permit submission is not just a material change — it can change the deck elevation by 3/8 inch, which on a 700 sqft deck changes the drainage slope, which can change where the stormwater tie-in lands. That cascade adds 5 to 9 business days.

Neighborhoods with their own architectural review boards compound the stakes. Windward and Deerfield run the cleanest first-pass reviews in Alpharetta — typically 7 to 10 days if the package is complete. Country Club of the South runs a more rigorous ARB and routinely takes 23 to 28 days on a first pass, with a second pass likely if materials are not spec’d precisely. Hutchinson Farm, White Columns, and Haynes Manor fall between those poles.

Weeks 1–2: Layout, Excavation, and the Grading Call That Decides Everything

Once the permit lands, the 4-week lane runs a single crew straight through. Day 1 is layout and protection — orange fence around the tree protection zone, silt fence along the downhill property line, access path plated if the truck route crosses an irrigation zone. Day 2 is excavation. On a typical Alpharetta backyard running a 3 to 6 ft grade change, we cut the pool shell, the deck subgrade, and the retaining wall footing in a coordinated sequence so the excavator does not double-back.

The 8-week lane stalls here for a predictable reason: the grading plan was not precise enough to tell the operator where finished grade sits on three sides of the pool. On Cecil-series Piedmont clay, which dominates soils across Alpharetta, you cannot pull an extra eight inches of depth and re-compact it without losing structural value. That clay has moderately high shrink-swell behavior — if you disturb it and back-fill carelessly, a patio settles measurably within two seasons.

A clean grading plan with finish-floor elevations at six reference points, a spot elevation at every corner of the deck, and a call-out for the retaining wall top-of-wall and bottom-of-wall saves 4 to 7 business days across the excavation and base-prep phases combined. It is the single highest-leverage document in the drawing set.

What a single-crew workflow looks like in practice

When one crew owns excavation, steel, plumbing rough-in, shotcrete, tile, coping, and deck, they sequence their own handoffs. There is no Tuesday-morning call wondering whether the plumbing sub arrived. There is no Thursday-afternoon delay because the masonry lead is on another job. The 4-week lane is almost always a single-crew lane. The 8-week lane is almost always a stacked-sub lane where each sub has a 2 to 3 day buffer built in to protect their own schedule — and those buffers compound.

Weeks 3–4: Shotcrete, Deck Base, and the 72-Hour Rule That Most Homeowners Miss

Shotcrete goes down, and then the pool sits and cures. That cure window is non-negotiable — 28 days for full structural cure, with the first 7 days being the most critical for shell hydration. Smart schedules treat this cure window as productive time. Deck base compaction, retaining wall block laying, drainage routing, and paver delivery all happen during the cure. The 4-week homeowner gets a pool deck and wall finished in parallel with the shell curing. The 8-week homeowner watches the shell cure while subs are scheduled weeks out.

Paver and coping installation carries its own temperature-sensitive window. Mortar-set coping on a pool edge requires ambient temperatures above 40°F for 72 hours after set. Alpharetta sits in USDA Zone 8a and logs roughly 20 freeze events per year, mostly December through February. A December or January pour date is fine — but a December or January pour date that gets pushed two days by a vendor delay can collide with a freeze event and force a 3 to 5 day pause. Over the course of a full project in cold season, the pauses add 1 to 2 weeks.

Retaining wall sequencing on a grade-change lot

Alpharetta backyards typically run 3 to 6 feet of total grade change across a residential lot. A 28-inch wall at the low corner of a pool deck is a common solution and almost always below the 48-inch threshold that triggers an engineered-wall requirement under Georgia residential code. Below 48 inches, a properly-drained segmental block wall with geogrid at 16-inch lifts is the industry standard. Above that, you are into a sealed engineer stamp and a 7 to 10 day design-review add.

The 4-week homeowner either stays under 48 inches or has the engineer stamp in hand on day one. The 8-week homeowner discovers the 48-inch threshold after the retaining wall has been called out as 50 inches on the hardscape sheet.

Where the 8-Week Lane Loses Time (and How to Avoid Each One)

Four specific failure modes account for almost every slide from 4 weeks to 8. None are unavoidable. All are design-phase problems, not construction-phase problems.

Failure mode 1 — ARB re-submissions. Country Club of the South, White Columns, and Hutchinson Farm ARBs will return a package for material clarification, setback confirmation, or drainage detail. Each re-submit cycle costs roughly 12 to 18 calendar days. Projects that ship a first-pass-perfect ARB package avoid this entirely. The fix is pre-meeting your ARB chair before submittal and getting a verbal temperature-check on the plan.

Failure mode 2 — Utility-service coordination confusion. Alpharetta is primarily Georgia Power territory, with a small Sawnee EMC footprint along the northern border where Alpharetta touches Milton. A pool requiring a service upgrade — common on 1990s Windward and Country Club of the South homes still running 150-amp panels — needs utility coordination that differs between the two providers. Georgia Power inspection calendars and Sawnee EMC inspection calendars do not align. Builds that assume “it’s all Georgia Power” and discover mid-project that the home is on Sawnee EMC lose 5 to 8 business days.

Failure mode 3 — Stacked-sub scheduling. Running separate subs for excavation, plumbing, gunite, tile, coping, electrical, pavers, and retaining wall means eight handoffs. Each handoff carries a 1 to 2 day cushion. Built cumulatively, that is 8 to 16 business days of cushion — two to three weeks of pure slack in the schedule. The single-crew lane eliminates it.

Failure mode 4 — Cold-weather optimism. Homeowners who sign contracts in October expecting a December completion routinely slide into February. The math of mortar cure windows and freeze days is unforgiving. Realistic December-to-February timelines are 6 to 10 weeks minimum.

The 4-Week Protocol: What We Ask Homeowners to Lock Before Submittal

The homeowners who land in the 4-week lane all do the same six things before we submit anything to the City of Alpharetta:

1. Sign off on a six-elevation grading plan. Not a sketch — a stamped grading sheet with finish-floor elevations at every corner of the deck, the pool shell top, and the retaining wall top-of-wall and bottom-of-wall.
2. Material selections finalized on paper, not verbally. Paver, coping, tile, deck surface, retaining wall block — every SKU on the spec sheet before permit submittal.
3. Drainage terminus confirmed. Where the deck runoff leaves the lot. Tied into an existing yard drain, daylighted at the property line, or routed through a dry well — decided before Week 1 layout.
4. Utility provider confirmed. Georgia Power or Sawnee EMC — known before electrical rough-in is scheduled.
5. ARB pre-meeting completed. Windward, Deerfield, Country Club of the South, Hutchinson Farm, White Columns, and Haynes Manor all permit a pre-submittal consult. Use it.
6. Seasonal realism. A January start on a 4-week lane is a myth. A February finish on a January start is realistic.

Why the tech-corridor buyer pattern matters for timelines

Alpharetta’s corporate relocations — Microsoft, CDW, and the broader GA-400 tech corridor — bring a homeowner profile that tends to make timeline decisions the way an engineering program manager would. That works in favor of the 4-week lane. The homeowners we see sliding to 8 weeks are more often the ones treating the hardscape design as an iterative aesthetic conversation rather than a decision-sequenced project. Both are legitimate approaches to the design phase. Only one is compatible with a four-week build.

Side-by-Side: What 4 Weeks and 8 Weeks Actually Look Like

Here is the same quarter-acre Alpharetta project sequenced two ways — same pool, same deck, same wall, same homeowner budget. Everything different is upstream of the first shovel.

The 4-week build: Week 0 finalizes design, material spec, grading plan, and drainage terminus. ARB approved in 9 days (Windward). City of Alpharetta permit issued on day 12. Week 1 — layout and excavation, single crew. Week 2 — steel, plumbing rough-in, shotcrete. Week 3 — shell cures while retaining wall and deck base are laid. Week 4 — coping, paver install, final grading, water-up, and startup. Total: 28 business days from first shovel to pool startup, 40 calendar days from contract to startup.

The 8-week build: Week 0 design phase starts but material selections drag. ARB first-pass returns with clarifications (Country Club of the South, day 25). Second pass approved day 42. Permit adds 14 days. Week 1 — excavation reveals grading sheet was imprecise; 6-day pause for revised spot elevations. Weeks 2–3 — stacked subs for plumbing and shotcrete, 3-day gap between handoffs. Week 4 — discovers home is on Sawnee EMC, not Georgia Power; electrical schedule shifts 7 business days. Weeks 5–6 — shell cures in parallel with a delayed retaining wall install because the wall came in at 50 inches and needs an engineer stamp. Weeks 7–8 — paver install, hit two freeze events, 6-day pause for mortar cure windows. Total: 56 business days from first shovel to startup.

Both builds end with the same finished backyard. One homeowner swims in May. The other swims in July.