The Hidden Tax on Housing: How Soft Costs Are Crushing Affordability

How soft costs — municipal fees, special districts, permitting delays, and NIMBY politics — quietly became a tax on housing.

By ML Solutions Research Group · Published November 8, 2025

Ask a builder what killed a deal and you’ll hear about lumber, labor, interest rates, and supply chains — the hard costs everyone tracks. Spend enough time inside the pro formas, as we do, and a quieter line keeps turning out to be the thing that broke the math: soft costs. Municipal fees, special-district taxes, permitting delays, and the slow grind of local politics now add up to a real tax on housing, and in many markets it’s no longer a rounding error. NAHB puts government regulation at 23.8% of the final price of a new single-family home — 10.5% from development and 13.3% from construction.¹ In Washington State, a 2025 analysis pushed that to 29.5%, roughly $203,976 on a $690,701 house.² The 10–15% “regulation slice” a lot of us still carry in our heads has quietly moved into the 20–30% range.

This sits alongside our work on rising hard costs and the changing labor market. Together, the three map how builders are getting squeezed from every direction at once.

What we mean by “soft costs”

When builders say soft costs, we mean everything that turns a parcel into a buildable, sellable home without being lumber or labor:

• Entitlement, zoning, and subdivision approvals
• Impact fees, system development charges, and other exactions
• Water and sewer tap fees, capacity, and connection charges
• Building, plan-review, and inspection fees
• Required reports and studies (traffic, wetlands, environmental, geotechnical)
• Special district taxes and assessments (LIDs, MUDs, PIDs, SIDs, and similar)
• The legal, carrying, and financing costs of delay

NAHB’s 23.8% rolls all of this into one tidy number.¹ But how it lands on your spreadsheet — and on the buyer’s closing statement — swings hard by state and even by city.

The special districts most buyers never notice

Some of the biggest shifts of the last two decades happened off most people’s radar, through special-purpose districts: LIDs (levee improvement), MUDs (municipal utility), PIDs (public improvement), SIDs (special improvement), and their cousins. In Texas, a recent investigation found the number of special-purpose taxing districts has nearly doubled since 1998 to roughly 2,300, now collecting more than $12.7 billion a year in property taxes — about 16% of all property-tax revenue in the state.³ Nearly half are MUDs, usually formed to fund infrastructure in fast-growing areas just outside city limits, and in some neighborhoods they push effective tax rates to nearly three times those in the nearby city.³

The concrete version: in Sugar Land, Texas, the Fort Bend County Levee Improvement District No. 2 protects more than 9,000 homes and a stretch of businesses in the First Colony area, funded by its own dedicated property-tax rate.^4,5 Without that levee district, those homes don’t exist in their current form. With it, every one of them carries a layer of tax on top of city, county, and school. Special districts solve real problems — flood protection and infrastructure that wouldn’t otherwise get built. The catch, from where we sit, is that they increasingly work as off-balance-sheet municipal finance, capitalized straight into land prices and monthly payments where buyers don’t see them coming.

Impact fees and tap fees stack up fast

Beyond district taxes, almost every new lot walks into a stack of one-time charges:

• School impact fees, park in-lieu fees, and traffic or roadway fees
• Water and sewer connection (tap) fees and plant investment charges
• Stormwater and drainage fees
• Building permit, plan-check, and inspection fees

HUD describes impact fees as one-time charges on new development meant to keep public facilities pacing with growth.⁶ California’s HCD notes that new housing there routinely absorbs stacked school impact fees, park in-lieu fees, sewer and water connection fees, and permit fees — often across several agencies and districts at once.⁷ In Washington State, a 2024 study put combined average impact fees at about $18,432 per home, and a good deal higher in places like Issaquah.⁸ The same Washington Center for Housing Studies work that found regulation at 29.5% of a new home’s price is what anchors that figure.²

City by city, the pattern repeats. Denton, Texas runs a detailed development-fee schedule and adopted updated water and wastewater impact fees in 2025.^9,10 Aurora, Colorado’s 2025 schedule itemizes separate water-connection, sewer-connection, tap, and metro wastewater fees, all due before you get a certificate of occupancy.¹¹ In California, UC Berkeley’s Terner Center concluded that development fees “add up and substantially increase the cost of building housing,” with projects often hit by exactions that aren’t even on the published schedule.¹² On a 50-lot subdivision, stacked impact and tap fees alone can run into the hundreds of thousands — money that has to spread across finished home prices whether the market will bear it or not.

Delay is a cost, even when the fee schedule holds still

Knowing the fee schedule doesn’t save you if you can’t predict the calendar. NAHB, BIAW, and others have documented permit reviews that once took a few months now stretching past a year in some markets, with carrying costs and interest piling up the whole time.^2,13 In the Pacific Northwest the sticker shock is real: Seattle’s Department of Construction & Inspections raised most fees 6.5% on January 1, 2025, lifting its base hourly rate to $274 and land-use rates higher still,¹⁴ with construction-permit fees up by double digits on many project types.¹⁵ Next door in King County, most building and land-use permit fees jumped about 49% for 2025.¹⁶ Out West, water adds its own layer — Colorado and Arizona jurisdictions stack water and wastewater development fees, while fast-growing Texas cities like Conroe and Beaumont are weighing or expanding impact-fee programs to keep pace.^17,18 The arithmetic is simple and unforgiving: every extra month in entitlement and permitting adds interest and overhead and risk you can’t bill back to anyone — before you’ve paid a dollar of the fees themselves.

NIMBY makes all of it worse

On top of the formal fees sits the political layer, usually labeled NIMBY. A joint NAHB/NMHC study found regulation across all levels of government accounts for an average of 40.6% of multifamily development costs, with neighborhood opposition a meaningful piece of that.^19,20 That study was about apartments, but the same forces increasingly hit for-sale and single-family work: appeals and lawsuits over rezoning, pressure to shrink planned communities and give up lot yield, demands for pricier architecture, landscaping, and amenities. In Seattle, Denver’s Front Range, greater Austin, and much of California, that translates into fewer units than planned, longer timelines, more hearings, and a fresh round of legal bills, redesigns, and studies. NIMBY never shows up as a line item, but it multiplies every other soft cost on the deal.

Are cities funding infrastructure, or balancing budgets on new homes?

None of this denies the real problems cities and districts face — aging pipes, stormwater, flood control, school capacity. But the numbers point one direction. Regulatory costs claim roughly 23–30% of new single-family prices in many markets, with Washington at 29.5%.^1,2 Texas special districts alone collect more than $12.7 billion a year, nearly 16% of the state’s property-tax take.³ Impact fees on a single Washington home average about $18,432.⁸ Multifamily carries a regulatory burden near 40.6%.¹⁹ For the buyer, an impact fee works like a prepaid property tax layered on top of the annual one.²¹ For the builder, new homes have become the easiest place for a local government to plug a budget gap. The honest read is that across much of the country, new housing has quietly become a primary funding source for local infrastructure and services — and that’s a big part of why ownership keeps drifting out of reach for working families.

What builders and their partners can actually do

We can’t make these costs disappear, but we’ve watched disciplined teams keep them from killing deals. A few things consistently separate them from everyone else:

1. Price the full municipal stack before you bid the land. Build a complete picture — impact fees, tap fees, district taxes, exactions, design mandates, likely delays — and treat it with the same seriousness you give lumber indexes and labor rates. Most blown pro formas we see skipped this step.
2. Put total cost of ownership in front of buyers early. MUD, LID, PID, and SID taxes shouldn’t surprise anyone at closing. Walking buyers through the full tax-and-fee overlay builds trust and points the frustration at the system instead of at you.
3. Push for time-certain permitting. Even if fee levels stay high, predictable timelines shave real money off every unit. Builders in Washington are lobbying for statutory permit “shot clocks” for exactly this reason.¹³
4. Treat zoning and NIMBY as core development work, not an afterthought. Early community engagement and political-risk management head off the last-minute appeals and redesigns that wreck project economics.
5. Read the fine print on every special district. In Texas and other high-growth states, understand the long-term tax trajectory of every LID, MUD, PID, or SID touching your project, and push for transparency and sunset provisions where you can get them.^3,4

Soft costs used to be something you trued up at the end. For a growing share of the country, they now decide whether a project happens at all. For anyone who cares about housing supply over the long run — builders, investors, and the people writing local policy — getting honest about this hidden tax isn’t optional anymore.

References

1. NAHB. “Government Regulation in the Price of a New Home: 2021.” nahb.org
2. Washington Center for Housing Studies (BIAW). “The Cost of Regulations 2025.” March 22, 2025. housingstudies.biaw.com
3. Kimble, M. & Wermund, B. “How a growing form of ‘invisible government’ is driving up Texans’ tax bills.” Houston Chronicle, Nov. 3, 2025. houstonchronicle.com
4. City of Sugar Land. “Levee Improvement Districts.” sugarlandtx.gov
5. Fort Bend County Levee Improvement District No. 2. “About FBCLID 2.” fbclid2.com
6. HUD USER. “Impact Fees & Housing Affordability: A Guide for Practitioners.” huduser.gov
7. California Department of Housing & Community Development. “Fees and Exactions – Sample Analysis.” hcd.ca.gov
8. Hanks, P. “Impact Fees in Washington State for 2024.” Washington Center for Housing Studies, January 2025. housingstudies.biaw.com
9. City of Denton, Texas. “Development Fees.” cityofdenton.com
10. City of Denton, Texas. “Permit and Fee Schedule” (October 8, 2025). cityofdenton.com
11. City of Aurora, Colorado. “Development and Connection Fee Schedule – Effective January 1, 2025.” auroragov (PDF)
12. Terner Center for Housing Innovation at UC Berkeley. “It All Adds Up: The Cost of Housing Development Fees in California.” 2018. ternercenter.berkeley.edu
13. Washington Center for Housing Studies. “Cost of Permitting Delays in Select Jurisdictions in Washington State.” November 2022. housingstudies.biaw.com
14. Seattle Department of Construction & Inspections. “2025 Fee Changes.” January 2, 2025. buildingconnections.seattle.gov
15. Seattle Department of Construction & Inspections. “2025 Fee Changes Summary Flyer.” seattle.gov (PDF)
16. King County, Washington. “Permit fees – Building and land use.” Effective January 1, 2025. kingcounty.gov
17. Houston Chronicle. “Conroe to revisit plan to assess impact fees for new development…” July 6, 2025. houstonchronicle.com
18. Beaumont Enterprise. “Beaumont could ask new developments to fund parks, water system.” 2025. beaumontenterprise.com
19. NAHB & NMHC. “Regulation: 40.6 Percent of the Cost of Multifamily Development.” 2022. eyeonhousing.org
20. AOBA. “New Research Shows Regulations Account for 40.6% of Apartment Development Costs.” aoba-metro.org
21. Been, V. “Impact Fees and Housing Affordability.” HUD Cityscape, Vol. 8, No. 1 (2005). huduser.gov