Partial vs. Full Pool Removal:
Which Is Right?
One of these options puts a permanent note on your property record saying the area is not suitable for building. Here is the full technical, financial and resale comparison · including the exact wording Contra Costa County uses.
The partial vs. full pool removal decision is usually presented as a price question. It isn’t. It is a permanent land-use question that happens to have a price attached. In unincorporated Contra Costa County, choosing the partial track means the County places a note on your parcel · and that note follows the property, not you. Before you compare two bids, read what that note actually says.
When you abandon a pool in unincorporated Contra Costa County under the uncertified-fill track · permit type “GN” · the County places a note on the parcel that reads, verbatim:
“Restricted Area on Site, due to abandoned swimming pool not Suitable for Building.”
That is a permanent record encumbrance on the property. It does not expire when the dirt settles, it does not go away when you sell, and it is the single most important fact in this entire decision. Almost nobody mentions it before you sign.
What’s In This Guide
The Parcel Note, And What It Really Means
Start here, because everything else in the partial vs. full pool removal decision flows from it. Contra Costa County recognizes two ways to retire a swimming pool. One of them ends with a clean, engineered, buildable pad. The other ends with a shell in the ground, uncertified fill on top of it, and a note on the parcel stating that the area is not suitable for building.
The note is not a warning label a contractor sticks on a document. It is a County record tied to the parcel. Anyone doing diligence on the property · a buyer’s agent, a title company, a lender’s appraiser, a future permit reviewer looking at your addition plans · can find it. And when they find it, the practical effect is simple: the footprint of that old pool is off the table for structures.
The East Bay is in the middle of an ADU building wave. A 600 square foot pool very often sits exactly where a rental unit or a garage conversion pad would go. A parcel note restricting that footprint doesn’t just limit what you build · it can limit what the next owner is willing to pay. See ADU site prep for what that footprint is usually worth.
None of this means the partial track is wrong. It means the partial track has a consequence that should be a decision, not a surprise. If you know about the note, price it in, and decide you don’t care because you’re planting a lawn and staying for thirty years · that’s a legitimate call. What we won’t do is let a homeowner find out about it from a buyer’s inspector.
Track I vs. Track II · The Full Technical Comparison
Here is what each permit actually requires in unincorporated Contra Costa County. Bring this section to every bid walk.
Track I · Engineered Fill · Permit Type “G”
- Fill compacted to a minimum 90% relative compaction measured against ASTM D1557.
- Fill materials must conform to County Ordinance Division 716, Article 716-8.4.
- Compaction tested by an accredited soils firm · not by the contractor’s judgment.
- A final compaction report signed by a licensed civil or geotechnical engineer.
- Submittal package: a 24″ × 36″ site plan plus a geotechnical report.
- The applicant must disclose the source of the dirt used as fill.
- The pool shell is removed, unless the soils engineer specifically states otherwise.
- Inspection sequence: #601 Rough Grade → #608 In-Progress (at 48″ from finish grade) → #620 Grading/Drainage Final.
- Result: buildable ground. No parcel note.
Track II · Uncertified Fill, Shell Stays · Permit Type “GN”
- A note is placed on the parcel: “Restricted Area on Site, due to abandoned swimming pool not Suitable for Building.”
- Not allowed where the ground slopes steeper than 10%.
- Minimum three drainage holes, each at least 24″ in diameter, spaced no more than 8 feet apart, with at least one in the deepest section of the pool.
- The top 24″ of the bond beam must be removed, unless the bond beam remains above grade.
- No concrete or debris smaller than 6″ in diameter may be placed in the drainage holes · they have to keep draining.
- The fill is uncertified. No accredited testing firm, no engineer’s report.
- The backfilled area is for landscaping only.
What You Get
- Buildable pad
- Engineer-signed compaction report
- No parcel note
- Shell gone, steel gone, plumbing gone
- Works on sloped lots
- Clean disclosure at resale
What You Don’t
- Cannot build over the footprint
- No engineered certification
- Permanent parcel note
- Shell stays buried under your yard
- Prohibited over 10% slope
- Disclosure conversation at resale
Read those two lists side by side and the pricing gap stops looking like a discount. Track I costs more because it includes an engineering deliverable. Track II costs less because it doesn’t. Neither contractor is cheating you · but only one of them is selling you buildable land.
“Will The Ground Sink?”
This is the number one anxiety homeowners bring to a pool removal walk, and it deserves a technical answer instead of reassurance.
Settlement happens when fill is placed loose and left to consolidate under its own weight, rain and time. The defense is not a contractor promising to “pack it down well.” The defense is compaction to a specified density, verified by testing, at controlled lift thicknesses, with inspection hold points that stop the job until someone checks.
On the Track I engineered-fill path, that means fill compacted to a minimum 90% relative compaction per ASTM D1557, tested by an accredited soils firm, with a final report signed by a licensed civil or geotechnical engineer. The County then enforces it with a sequence you cannot skip: inspection #601 at rough grade, #608 in-progress when the fill is 48 inches from finish grade, and #620 at grading and drainage final. Three separate chances for an inspector to reject work that isn’t right · which is precisely the point.
On a properly executed full removal, settlement risk is managed by specification and documented by testing. On a partial fill, you are relying on drainage holes and reasonable workmanship rather than certified density. That’s why the County restricts the result to landscaping. Soft spots and localized depressions over an abandoned shell are a known phenomenon · the drainage-hole requirements exist specifically so water moves through instead of pooling under your lawn.
If a bidder answers “will it sink?” with confidence but no spec number, no test, and no engineer, they have answered a different question than the one you asked.
Planning A Project In The East Bay?
Free on-site estimate anywhere in Contra Costa or Alameda County. One fixed written number, permits included.
Get My Free Estimate“Can I Build On It?”
Short answer: Track I yes. Track II no.
That is the decisive question in this entire comparison, and it is unusually black and white. Track I exists to produce ground that a structure can sit on: engineered fill, specified compaction, accredited testing, an engineer’s signature and a disclosed dirt source. That paper trail is what a plan reviewer needs to see when you later submit an addition, a garage, a pool house or an ADU over that footprint.
Track II produces the opposite. The County’s own note says the area is not suitable for building. That’s not a soft recommendation you can engineer around cheaply later · you would be looking at excavating the shell back out, doing the full removal you skipped, and paying for the demolition twice.
Take a site plan and draw the pool footprint. Then draw everything you might ever put in that backyard: an ADU, a garage, a shop, an addition, a foundation for a covered structure. If any of them overlap the pool, you want Track I. If none of them do, and the lot is flat enough, Track II is genuinely available to you.
Resale And Disclosure In California
California sellers are generally required to disclose material facts about a property · things that could reasonably affect a buyer’s decision or the property’s value. A filled-in swimming pool, and any note recorded against the parcel about it, is the kind of information that generally falls into that category.
We are a demolition contractor, not attorneys, and we are not going to pretend otherwise. What we can tell you from doing this work every month:
- Buyers’ agents in the East Bay do ask about backyard history, especially where a satellite image from a few years ago shows a pool and today’s yard shows lawn.
- County records are searchable. A parcel note is not a secret you get to keep.
- Permitted work with a paper trail is far easier to explain at closing than unpermitted work with none. A pool filled without a permit is the worst version of this conversation.
- Keeping your closeout package · permit, inspection sign-offs and, on the full-removal track, the engineer’s compaction report · turns a scary disclosure into a boring one.
Confirm the specifics with your real estate agent and, where the stakes justify it, a real estate attorney. This article is general information about a construction decision, not legal advice, and disclosure obligations turn on facts we can’t see from here.
What The Difference Costs
Across every size class, full removal runs roughly double a partial. Here are the Contra Costa working ranges.
| Pool Size | Partial (Track II · “GN”) | Full (Track I · “G”) | Typical Delta |
|---|---|---|---|
| Under 500 sq ft | $3,000 to $5,500 | $6,500 to $11,000 | $3,500 to $5,500 |
| 500 to 800 sq ft | $5,500 to $8,500 | $11,000 to $16,000 | $5,500 to $7,500 |
| Over 800 sq ft | $8,500 to $12,000 | $16,000 to $25,000 | $7,500 to $13,000 |
Both tracks then carry the same ancillary line items, and both should be itemized on your quote:
| Ancillary | Cost | Notes |
|---|---|---|
| Electrical disconnect | $300 to $800 | Pump, light and bonding circuits made safe at the panel. |
| Plumbing disconnect & cap | $250 to $600 | Supply and return lines cut and capped. |
| Soil / compaction testing | $200 to $400 | Track I only · plus the engineer’s report. |
| Backfill material | $15 to $60 / cubic yard | Often the largest single variable. Demand yardage × unit rate. |
| Final grading | $500 to $1,200 | See grading and leveling. |
| Debris removal | 25% to 35% of project cost | Much larger on a full removal · the shell is the debris. |
On a typical 500-800 sq ft East Bay pool, the difference is roughly $5,500 to $7,500. Compare that to what it costs to build an ADU on land you can’t build on · because that’s the actual alternative. Full numbers and a worked Pinole example are in our Contra Costa pool removal cost guide.
A Decision Framework That Actually Decides
Enough comparison. Here is how to close the loop.
Choose full removal if any of these are true
- You plan to build anything over or near the pool footprint · addition, garage, shop, covered structure.
- You’re considering an ADU, now or in the next decade. This is the dominant East Bay case.
- You expect to sell within 3-5 years and don’t want a parcel note in the middle of the transaction.
- Your lot slopes more than 10% · the partial track isn’t legally available to you anyway.
- You want the maximum flexibility a buyer will pay for, and the cleanest disclosure position.
Partial may be fine if all of these are true
- The footprint will be lawn, planting beds, a patio or a play area · permanently.
- The lot is flat, comfortably under the 10% slope limit.
- You’re staying long term and the parcel note doesn’t collide with any plan you have.
- You accept that a future buyer may value the yard differently than you do.
- The work is still permitted · with the drainage holes, bond-beam removal and inspections done correctly.
One rule regardless of track: never fill a pool without a permit. An unpermitted fill has all the downside of the partial track and none of the paperwork that makes it defensible later. It is the one version of this job that is genuinely hard to fix.
City Variation: Concord’s Own Rules
Everything above describes unincorporated Contra Costa County · which includes El Sobrante, where we’re based. Incorporated cities run their own programs, and Concord is a useful example of how much the details shift across a county line on a map.
| Requirement | City of Concord |
|---|---|
| Permits | Demolition permit plus grading and encroachment permits |
| Bond beam | Demolished a minimum 12 inches below grade |
| Drainage | Two holes of 6 square feet each through the pool bottom |
| Backfill | 8-inch lifts, compacted to 90% relative compaction |
| Pool water | Must be neutralized before discharge to the sanitary sewer · never the storm drain. Central Contra Costa Sanitary District: 925-229-7288 |
| Weather | Demolition not allowed without a five-day clear-weather forecast |
| Notice | 2 business days’ notice before starting |
| Waste diversion | 50% of project waste and 75% of inerts; refundable recycling deposit at permit issuance |
| Permit life | Expires 180 days after the last passed inspection |
Note how specific Concord gets: bond beam depth, hole area, lift thickness, compaction percentage, water chemistry and the weather forecast are all written requirements. Two of those trip up out-of-area crews constantly · the storm drain prohibition and the five-day forecast. Draining a pool to the street is not a shortcut; it’s a discharge violation.
Richmond, San Pablo, Pinole, Hercules, El Cerrito, Martinez and Walnut Creek each have their own wrinkles too. Our Contra Costa demolition permits guide covers the broader picture, and our service areas page lists where we pull permits routinely.
If there is any chance you’ll build on that ground · or sell to someone who wants to · pay for the full removal. If it’s landscaping forever and your lot is flat, the partial is a defensible way to save five to seven thousand dollars. Just make sure you chose it, rather than having it chosen for you by the lowest bid.
Frequently Asked Questions
What exactly does the parcel note say?
In unincorporated Contra Costa County, the uncertified-fill track (permit type “GN”) results in a note placed on the parcel reading: “Restricted Area on Site, due to abandoned swimming pool not Suitable for Building.” It is a permanent record tied to the property, not to the owner, and it survives a sale.
Is partial pool removal a bad idea?
No · it’s a narrower idea. It is legitimate, permitted work when the lot slopes less than 10%, the footprint is going to be landscaping permanently, and the drainage holes, bond-beam removal and inspections are done to spec. It becomes a bad idea when someone chooses it without knowing about the parcel note or the building restriction. The failure mode isn’t the method, it’s the missing information.
Will a filled-in pool sink over time?
Settlement is controlled by compaction specification, lift thickness and testing · not by assurances. On the engineered-fill track, fill is compacted to a minimum 90% relative compaction per ASTM D1557, tested by an accredited soils firm, certified by a licensed civil or geotechnical engineer, and inspected at three hold points (#601 rough grade, #608 in-progress at 48″ from finish grade, #620 grading and drainage final). On the uncertified track there is no such testing, which is exactly why the County limits the result to landscaping.
Can I build an ADU where my pool used to be?
Only if the pool was fully removed on the engineered-fill track with a signed compaction report. That report is what a plan reviewer needs to see. If the pool was abandoned under the uncertified-fill track, the parcel note states the area is not suitable for building · and correcting that later means excavating the shell back out and doing the full removal you originally skipped, at full price.
Do I have to disclose a filled-in pool when I sell?
California sellers are generally required to disclose material facts about a property, and a filled-in pool along with any parcel note about it is the kind of information that typically qualifies. We’re a demolition contractor, not a law firm · confirm your specific obligations with your real estate agent and a real estate attorney. What helps in every case is keeping the permit, the inspection sign-offs and, on a full removal, the engineer’s compaction report.
How much more does full pool removal cost than partial?
Roughly double. Under 500 sq ft: $3,000-$5,500 partial versus $6,500-$11,000 full. 500-800 sq ft: $5,500-$8,500 versus $11,000-$16,000. Over 800 sq ft: $8,500-$12,000 versus $16,000-$25,000. On the typical East Bay pool the delta is about $5,500-$7,500. Full breakdown in our Contra Costa pool removal cost guide.
Legacy Demolitions Team
Licensed demolition and excavation contractor at 4533 Appian Way, El Sobrante, CA 94803. CA License #1122603. We pull pool abandonment permits on both the engineered-fill and uncertified-fill tracks across unincorporated Contra Costa County and surrounding cities, and we tell homeowners about the parcel note before they sign, not after.
Not Sure Which Track You Need?
Tell us what you want that backyard to be in ten years. We’ll tell you which permit gets you there, what it costs, and what the County will and won’t allow on your specific lot.
Legacy Demolitions LLC · 4533 Appian Way, El Sobrante, CA 94803 · CA License #1122603
Clean lot, ready to build on.
From the first walk-through to the final sweep, the teardown, the export and the grading run under one written scope. No second mobilization and no surprise cleanup bill.