3541 Chain Bridge Road

Project description

The site at 3541 Chain Bridge Road is currently developed with two office buildings constructed in the early 1970s, containing approximately 16,616 square feet of office space, two courtyards, and 124 surface parking spaces. The project documents note a discrepancy in the number of existing buildings: the city project directory describes four two-story buildings, while the project narrative refers to two office buildings; the number of buildings is therefore uncertain, though the square footage figure is extracted with high confidence.

The proposal seeks to redevelop the 2.0881-acre parcel (90,959 square feet) with a 4-story mixed-use building. Proposed development includes 37 residential dwelling units — specifically 29 townhouses and 8 two-over-two units — and 2,730 square feet of retail uses located on the eastern edge of the property. The application describes the project as a homeownership opportunity with lower-density development. A total of 88 parking spaces are proposed. The zoning concept plan establishes a maximum building height of 5 stories and 60 feet, with the provided building height set at 4 stories and 60 feet. No affordable units are identified in the available documents with high confidence; that field carries low extraction confidence. The project's approval status is not established in the available documents.

Economic effects

New demand. The 37 proposed for-sale units, at a central occupancy rate of 0.97, are estimated to generate approximately 34 to 37 new households (central: approximately 36) and 55 to 88 new residents (central: approximately 72). These figures are computed as proposed units multiplied by the occupancy rate, and households multiplied by persons per multifamily unit using Rutgers CUPR bedroom-mix multipliers, respectively. Aggregate annual household income for the new population is estimated at approximately $7.7 million to $11.4 million (central: approximately $9.5 million), computed as households multiplied by the mean income of site tract 51600300200 from Census ACS 5-year 2024 data ($195,124) and a new-construction income premium.

Spending clusters. Applying BLS Consumer Expenditure Survey 2023 data with Engel-curve income scaling by category, the new households are estimated to generate annual spending of approximately $238,000–$398,000 in grocery, $225,000–$429,000 in restaurants and bars, $288,000–$568,000 in comparison retail, $45,000–$78,000 in convenience retail, $66,000–$127,000 in personal services, and $244,000–$497,000 in entertainment. Each category is computed as households multiplied by the CES category spend scaled by the income ratio raised to a category-specific elasticity.

Using a Huff model over individual retail points of interest — a joint destination-and-mode choice where the probability of choosing a destination varies with its attractiveness and exponential walk-time decay — the top clusters for projected spending capture are Fairchester Drive & Hill Street ($319,000–$654,000 per year, central approximately $460,000), Chain Bridge Road & North Street ($148,000–$326,000, central approximately $215,000), and Fair Lakes Parkway & Fair Oaks Mall ($105,000–$180,000, central approximately $147,000). These are reporting rollups of individual business-level Huff allocations. These capture figures are screening estimates — they indicate where new spending is most likely to land and show the direction and rough magnitude of effect, but they are not predictions.

Across all modeled in-city destinations, the Huff model yields an in-city capture share for food away from home of approximately 0.61–0.71 (central: approximately 0.64), and an in-city capture share across all retail categories of approximately 0.57–0.64 (central: approximately 0.59). These shares are computed as the share of Huff-model capture landing at destinations inside the city boundary.

Project's own retail. The 2,730 square feet of proposed ground-floor retail competes as a destination in the Huff model. Its estimated annual capture from new residents' spending is approximately $1,009–$2,591 (central: approximately $1,822), computed as the Huff model allocation to the project's own retail treated as an equivalent point-of-interest destination. This is a screening estimate. The small magnitude reflects the model's finding that the project's own retail attracts only a modest share of new residents' spending relative to the established clusters nearby.

Foot-traffic. The foot-traffic index change across the 10 nearest commercial street segments is modeled at 0.0% on the relative index used in this analysis. This figure is computed as the exact marginal trip flows from the site allocated to a shortest-path pedestrian network, compared against a seeded sampled betweenness baseline of today's population. The metric's narrative note clarifies that this comparison uses a sampled index of today's walkers, not calibrated pedestrian counts. New annual spending arriving on foot at nearby businesses is estimated at approximately $15,800–$625,800 (central: approximately $102,200), computed as the walk-mode share of the joint destination-and-mode Huff choice summed over businesses; this figure carries a wide range because it is sensitive to the walk-share and walk-decay assumptions. This is a screening estimate.

Jobs ledger. The existing office space, at 16,616 square feet divided by an assumed 250–500 square feet per office job, is estimated to support approximately 33 to 66 on-site jobs currently (central: approximately 47). The proposed 2,730 square feet of retail, divided by an assumed 400–700 square feet per retail job, yields an estimated 4 to 7 new on-site retail jobs (central: approximately 5). No new office space is proposed. The net on-site job change is therefore estimated at approximately –63 to –26 jobs (central: approximately –42). No proposed office square footage is identified with high confidence in the extraction.

Fiscal effects

Real estate tax. The current site generates approximately $45,479 per year in real estate tax, computed as the current assessed value of parcel 57 2 02 002 (from the City of Fairfax Real Estate Assessment Database, 2026) multiplied by the FY2027 real estate tax rate divided by 100. The projected assessed value after redevelopment is estimated at approximately $16.9 million to $25.7 million (central: approximately $22.5 million), computed as 37 units multiplied by assessed value per unit (based on 100 condominium-class comparable properties from the city assessment database) plus retail square footage multiplied by an assumed assessed value per square foot. This yields a projected real estate tax of approximately $181,600–$275,600 per year (central: approximately $241,300), and a projected increase in real estate tax of approximately $136,000–$230,000 per year (central: approximately $195,800), computed as projected minus current real estate tax. The projected assessed value per acre rises from approximately $2,030,794 currently to approximately $8,111,000–$12,306,000 (central: approximately $10,774,000).

Other recurring revenue lines. Several additional revenue streams are estimated, all carrying the rough-estimate designation where the method says so:

• Personal property tax on resident vehicles (rough estimate): approximately $12,800–$54,500 per year (central: approximately $29,100), computed as new households multiplied by assumed vehicles per household, multiplied by assumed average vehicle assessed value, multiplied by the city personal property tax rate. No project-specific vehicle data exist; this should be treated as order-of-magnitude.
• BPOL business license tax on project retail (rough estimate): approximately $204–$1,636 per year (central: approximately $654), computed as proposed retail square footage multiplied by assumed gross sales per square foot, multiplied by the city BPOL retail rate, multiplied by the net-new share assumption.
• Business tangible property tax (rough estimate): approximately $451–$1,691 per year (central: approximately $902), computed as proposed commercial square footage multiplied by assumed equipment value per square foot, multiplied by the city business tangible property rate.
• Meals tax on captured in-city dining: approximately $6,100–$13,700 per year (central: approximately $9,100), computed as restaurant spending multiplied by the in-city capture share from the economic Huff run, multiplied by the city meals tax rate.
• Meals tax on the project's own restaurants (rough estimate): approximately $1,400–$25,800 per year (central: approximately $7,400), computed as ground-floor square footage multiplied by assumed sales per square foot, multiplied by an assumed restaurant share of retail, multiplied by the meals tax rate, multiplied by the net-new share.
• Local sales tax share on captured in-city retail: approximately $3,200–$6,700 per year (central: approximately $4,700), computed as in-city captured retail spending multiplied by the local sales tax share under Virginia Code § 58.1-605.
• Local sales tax on the project's own retail (rough estimate): approximately $1,000–$8,200 per year (central: approximately $3,300), computed as ground-floor square footage multiplied by assumed gross sales per square foot, multiplied by the local sales tax share, multiplied by the net-new share.

Service costs. The annual service cost is estimated under a marginal framing: non-school per-capita cost from the FY2027 General Fund budget ($5,254 per capita, derived from the non-school share of $207,912,496 total budget divided by 25,026 residents) is multiplied by a marginal cost factor (central: 0.35, range 0.25–0.55) that reflects the share of fixed services that scale with infill residents, and added to a school-cost component. The school cost is estimated at approximately $36,900–$118,200 per year (central: approximately $73,900), computed as estimated K-12 students (central: 3.7, range 1.85–5.92, from 37 units multiplied by 0.10 students per unit using Rutgers CUPR multifamily multipliers) multiplied by the net local cost per pupil of $19,961 (derived as the FY2027 FCPS tuition contract minus state education revenue, divided by 3,103 students). Total annual service cost under this framing is estimated at approximately $109,200–$372,200 per year (central: approximately $205,800). The fiscal notes caution that this framing understates costs if a service-capacity expansion is triggered; the marginal cost factor's range is intended to carry that uncertainty.

Net fiscal impact. The net annual fiscal impact under the marginal framing — incremental recurring revenue minus service costs — is estimated at approximately –$211,000 to +$233,000 per year, with a central estimate of approximately +$45,000 per year. This is computed as total incremental new recurring revenue minus service cost, where only services that scale with new residents are included. The wide range reflects the sensitivity of the school-cost component to the students-per-unit assumption and the sensitivity of service costs to the marginal cost factor. The revenue side includes the rough-estimate personal property and BPOL lines; the fiscal module notes that leaving these at zero would understate revenue for taxes the city does levy, but both carry wide assumption-driven bounds.

No external fiscal estimates with published figures were available for comparison. Three external documents were identified in the extraction process (a staff report for agenda item 11b, PLN26-00137; a staff report for agenda item 8a on detached ADUs; and a staff report for agenda item 6c on an owner's representative for school construction), but all were dropped from the analysis because no quantitative figures were found in those materials.

Not evaluated in this version

Several analyses are deferred and not reflected in any figures above. Bike-lane corridor impacts, trail connectivity effects, and broader multimodal network analyses were not computed in this version. Environmental analyses — including stormwater, tree canopy, and impervious surface effects — were not evaluated. A comparable-places analysis benchmarking this project against similar mixed-use redevelopments elsewhere in the region was not conducted. These items may be addressed in a subsequent version of this report.