County or equivalent · 42045
Delaware County, Pennsylvania
Annual housing permits and reporting coverage
- Published estimate · 2025
- 217
- Reported only · 2025
- 133
- Added by estimation · 2025
- 84
Reported and estimated units by year
| Year and source | Published estimate | Reported only | Added by estimation |
|---|---|---|---|
| 2023 Census file | 300 | 293 | 7 |
| 2024 Census file | 281 | 203 | 78 |
| 2025 Census file | 217 | 133 | 84 |
2024 to 2025 · published estimate -64 units · reported only -70 · added by estimation +6. This split describes the difference between the published columns.
What types of housing were authorized?
| Units in building | Published estimate | Reported only | Added by estimation |
|---|---|---|---|
| One unit | 215 | 133 | 82 |
| Two units | 2 | 0 | 2 |
| Three or four units | 0 | 0 | 0 |
| Five or more units | 0 | 0 | 0 |
Local housing and rent context
| Measure | Estimate and margin |
|---|---|
| Housing units · Census table B25001 | 229,715 ± 174 |
| Median gross monthly rent · Census table B25064 | $1,372 ± $22 |
| Gross rent at least 30% of income · Census table B25070 | 54.9% ± 1.7 percentage points |
| Gross rent at least 50% of income | 30.6% ± 1.6 percentage points |
| Estimated households with a computed rent-to-income ratio | 63,195 |
The 2025 permit estimate amounts to 0.9 authorized units per 1,000 housing units in the ACS estimate. The numerator and denominator cover different periods.
The Vintage 2025 Census housing stock estimate changed from 230,045 in 2024 to 230,160 in 2025 (+115 units). This is a separate model-based inventory estimate.
Permit offices listed under this county code
Use the office pages for their own histories and source coverage notes.
- Aldan boroughPermit office 42006700 · Delaware County · 0 authorized units
- Aston townshipPermit office 42021700 · Delaware County · 0 authorized units
- Bethel townshipPermit office 42049000 · Delaware County · 4 authorized units
- Brookhaven boroughPermit office 42073000 · Delaware County · 0 authorized units
- Chadds Ford townshipPermit office 42053200 · Delaware County · 3 authorized units
- ChesterPermit office 42110200 · Delaware County · 9 authorized units
- Chester Heights boroughPermit office 42110800 · Delaware County · 63 authorized units
- Chester townshipPermit office 42111400 · Delaware County · 0 authorized units
- Clifton Heights boroughPermit office 42120100 · Delaware County · 0 authorized units
- Collingdale boroughPermit office 42129400 · Delaware County · Latest year unavailable
- Colwyn boroughPermit office 42130900 · Delaware County · 0 authorized units
- Concord townshipPermit office 42131500 · Delaware County · 57 authorized units
- Darby townshipPermit office 42155200 · Delaware County · 0 authorized units
- East Lansdowne boroughPermit office 42190900 · Delaware County · 0 authorized units
- Eddystone boroughPermit office 42201700 · Delaware County · 0 authorized units
- Edgmont townshipPermit office 42202900 · Delaware County · 3 authorized units
- Glenolden boroughPermit office 42262300 · Delaware County · 0 authorized units
- Haverford townshipPermit office 42289000 · Delaware County · 5 authorized units
- Lansdowne boroughPermit office 42352300 · Delaware County · 1 authorized units
- Lower Chichester townshipPermit office 42384100 · Delaware County · Latest year unavailable
- Marcus Hook boroughPermit office 42405700 · Delaware County · Latest year unavailable
- Marple townshipPermit office 42409300 · Delaware County · 20 authorized units
- Media boroughPermit office 42419200 · Delaware County · 8 authorized units
- Middletown townshipPermit office 42426700 · Delaware County · 7 authorized units
- Millbourne boroughPermit office 42433600 · Delaware County · 0 authorized units
- Morton boroughPermit office 42449500 · Delaware County · Latest year unavailable
- Nether Providence townshipPermit office 42462700 · Delaware County · 1 authorized units
- Newtown townshipPermit office 42478300 · Delaware County · 8 authorized units
- Norwood boroughPermit office 42495700 · Delaware County · Latest year unavailable
- Parkside boroughPermit office 42514900 · Delaware County · 0 authorized units
- Prospect Park boroughPermit office 42555400 · Delaware County · 0 authorized units
- Radnor townshipPermit office 42559300 · Delaware County · 19 authorized units
- Ridley Park boroughPermit office 42571300 · Delaware County · 1 authorized units
- Ridley townshipPermit office 42571600 · Delaware County · 2 authorized units
- Rose Valley boroughPermit office 42579400 · Delaware County · 1 authorized units
- Rutledge boroughPermit office 42585700 · Delaware County · 1 authorized units
- Sharon Hill boroughPermit office 42605500 · Delaware County · 0 authorized units
- Springfield townshipPermit office 42644500 · Delaware County · 0 authorized units
- Swarthmore boroughPermit office 42666100 · Delaware County · Latest year unavailable
- Tinicum townshipPermit office 42677200 · Delaware County · Latest year unavailable
- Trainer boroughPermit office 42683500 · Delaware County · 0 authorized units
- Upland boroughPermit office 42700900 · Delaware County · 0 authorized units
- Upper Chichester townshipPermit office 42702400 · Delaware County · Latest year unavailable
- Upper Darby townshipPermit office 42702700 · Delaware County · 4 authorized units
- Upper Providence townshipPermit office 42709000 · Delaware County · Latest year unavailable
- Yeadon boroughPermit office 42791200 · Delaware County · Latest year unavailable
Sources and definitions
How to read these figures
- The Census Building Permits Survey counts new privately owned housing units authorized by permits. One permit can cover multiple units. The counts describe authorizations, a stage before starts and completions.
- The published estimate includes reported units and Census estimates that fill gaps. The difference is calculated from those two columns. Reported-only units can include records from approved alternative sources. A missing report can leave an office without a usable count.
- County and state totals come from their own Census files. Permit offices can cover places across county lines or areas served by another jurisdiction. The office’s county field is used for navigation.
- ACS housing inventory and rents are survey estimates for 2020–2024. Gross rent includes rent and separately paid utilities or fuels. Rent burden is the share paying at least 30% of income among cash-rent households with a computed ratio. Margins are at 90% confidence. The margin for rent burden is approximate.
- Vintage 2025 county housing stock is a separate Census series. Its model uses building-permit data alongside other inputs. Read stock change and permits as separate measures.
Public sources retrieved November 10, 2026. Building Permits Survey annual data · Survey methodology · American Community Survey data · Download the comparison