Zoning, History & Cambridge's Future: the June 17, 2025 Report

Read the June 17, 2025 Report Below

June 17, 2025 Housing Report of Neighborhood & Longterm Planning Committee

Summary of June 17, 2025 Housing Report

HERE IS WHAT THIS REPORT TELLS US 

On June 17, 2025, Cambridge’s Housing and Neighborhood & Long Term Planning, Public Facilities, Arts & Celebration Committee released a detailed report on the city’s zoning strategy for two critical corridors: Cambridge Street and Massachusetts Avenue.

 The joint committee report offers a detailed update on Cambridge’s zoning strategy for Cambridge Street and Massachusetts Avenue, particularly in relation to meeting the city’s housing goals.  However, this also has serious implications for the city as a whole.

The proposed zoning reforms are meant to address the city’s intensifying housing crisis—but how far do they go, and what are the tradeoffs? Read the report at the link above.

This CCC  blog explores what the June 17, 2025 housing report says, what the report leaves out, and what it could mean for the future of our dense, historically rich, and environmentally fragile city.
               *Note: Young Kim has determined, that CDD has significantly undercounted the number of units under development, He writes
                  that  "637 new units were added since the 2023 and were not factored into CDD's results.  If 637 units were added in a year,     
                 simple  linear projection would mean  637 X 6 or 3822, and not the 70 new units as CDD claims." Read Young Kim's report in a
                CCC blogpost  HERE   

                  **Note: CDD did not update their analysis between the reports even though housing numbers likely increases.  See the two graphs
                  at the bottom of this blog. All this shows a sizable lack of  transparency and reasonable care on this issue.

                    *** Note: None of this accounts for likely decreases in housing need based on Federal policy changes - fewer Harvard and other 
                    area graduate students & post docs, major impacts on local hospitals etc due to federal grant changes,  sizable decrease in bio-tech
                     re. changes in vaccine mandates, and the MAJOR changing need to many more Affordable houses, now that the state has cut
                    Section 8 funds. 

🏠 Housing Goals vs. Reality in Cambridge’s Envision Cambridge plan lays out ambitious housing targets for 2030 and 2040. Yet, current zoning laws are not enough to meet them.
📊 2030 Targets:

• Total Housing Goal: 12,500 units
• Affordable Housing Goal: 3,175 units
• Under Existing Zoning: 8,850 total / 1,390 affordable
• With Proposed Rezoning: 9,770 total / 1,580 affordable

🔭 2040 Projections:

• Total Needed: 23,863 units
• Under Existing Zoning: 18,080 total / 3,180 affordable
• With Proposed Rezoning: 20,840 total / 3,750 affordable

➡️ Key Takeaway:
Even under the most generous rezoning scenario, the city would still fall short—by thousands of units—especially on affordability. This leaves critical gaps for middle- and low-income households.

📍 Focus Areas: Development DensityThe proposed rezoning primarily impacts these three zones:

• Cambridge Street (1 mile): 21,799 residents, 10,519 households, 225 ground-floor businesses
• South of Porter Square (0.8 miles): 11,100 residents, 4,700 households, 88 businesses
• North Mass Ave & Porter Square (1.2 miles): 16,250 residents, 7,500 households, 203 businesses

Active AHO projects include:

• 2072 Mass Ave – 50 units
• 243 Walden St – 48 units
• 305 Webster Ave – 23 units

🧱 The new Zoning Proposals at a Glance. The new zoning strategy introduces:

• Taller buildings with bonuses for “active” ground-floor uses
• 6-story residential baselines, up to:
  • 11 stories for mixed-use (with ground-floor activity)
  • 18 stories in Porter Square, in exchange for public benefits (like open space or shared parking)
• Commercial-only building limits to prevent lab and office overgrowth

🌆 What’s Missing or Concerning?

1. Cambridge’s Density Already Strains Infrastructure: 

Cambridge is one of the densest U.S. cities (18,000+ people per square mile), yet these plans propose adding more height and mass along already congested corridors.

OUR RISKS include:

• Infrastructure overload (transit, sewer, roads)
• “Canyon effects” from tall, continuous buildings
• Disruption of historical character and neighborhood scale

2. Green Space Shrinks While Tree Canopy Is Threatened

• Mass Ave proposals allow 0–15% open space
• Cambridge Street plans offer no baseline, with only a 15% bonus for open space if tied to ground-floor design
• No explicit protections for mature trees, leading to likely canopy loss

3. Demolition is Inevitable: 
To build taller and denser structures, older buildings will need to be torn down, including historic homes and storefronts.
This means:

• Resident and Cultural displacement
• Loss of legacy small businesses
• Visual erasure of Cambridge’s architectural heritage

4. Urban Design Tradeoffs: 
While height and density are emphasized, design quality is vague. Bonuses are linked to ill-defined metrics like “active uses” without binding aesthetic or livability standards.
         RESULT: More units, possibly of lower quality, minimal outdoor space, and smaller interiors with poor natural light.

5. Climate and Environmental Contradictions
The city touts “climate resilience,” but the zoning text includes NO mandates for:

• Net-zero buildings
• Green roofs or passive house standards
• Stormwater systems or flood resilience
• Tree preservation

This risks worsening the heat island effect and increasing emissions through demolition and new construction.
            *Note: Cambridge ONLy requires net-zero and green-roofs on very large buildings.

💸 Will This Actually Lower Housing Costs?
The theory is that: More supply = Lower prices. The reality: It’s more complicated.
Lessons from Boston and Vancouver show that:

• More density often means luxury units, not affordability
• Older, naturally affordable units get demolished
• Land values spike with upzoning, feeding speculation
• Rents and sale prices often rise, not fall, after rezoning​

In Cambridge’s case:

• ONLY  1,580 of 9,770 new units (by 2030) will be affordable
• Without stronger affordability mandates or tenant protections, the changes may RAISE AVERAGE HOUSING COSTS 

                ** The new (Feb 10, 2025) citywide upzoning, has decreased required "affordable"                                                units  than long assumed. We now allow 20% of total resident area NOT 20% of total units in that structure, so that one
                            could create, say 2 larger "affordable" units  in 40 unit building, and the remaining 38 units, smaller luxury units, decreasing 
                            by half, the number of units one might otherwise expect.

🧭 Path Forward: Can We Do Better?

             If Cambridge wants a future that is inclusive, sustainable, and historically grounded, it
             must move beyond simple height increases.

Recommendations:

• Preserve first: Prioritize adaptive reuse over demolition
• Enforce climate goals: Require net-zero standards, stormwater plans, and tree preservation
• Strengthen affordability: Mandate 25–30% affordable units in all new development
• Protect small businesses: Provide commercial rent stabilization or tenant protections
• Disperse density: Explore infill housing across the city, not just on two corridors
• Invest publicly: Use public land and funding to build true affordable housing

📣 FINAL THOUGHTS:
The city’s proposed zoning changes are a double-edged sword: they aim to address a real housing crisis but may intensify other urban problems. The risks—displacement, environmental degradation, loss of heritage—are not minor.

Cambridge must weigh carefully:

What kind of city are we becoming, and for whom are we building?

**The two graphs below show differences between CDD's January 16 and June 17 housing report projection numbers. This raises questions about CDD's interest in doing data-driven accurate reporting.