64-City Intelligence · Applied ML research

Real Estate Condo Price Board

Weekly ZIP-level condo/co-op forecasts derived from Zillow Home Value Index histories, with ChrionML® dataset construction, quality assurance, model evaluation, and interpretation.

6 cities · 3 final matchups

WEEK 1SEP 25 WEEK 2OCT 2 WEEK 3OCT 9WEEK 4OCT 16

Friday, October 9, 2026Week 3 · East

FINAL · MODEL REVIEW COMPLETE80 months · 44 rolling backtests per city

BBY

Back Bay, MAZIP 02116 · Latest ZHVI $1,298,982

$1,300,581FORECAST · +0.12%

HAN

Hanover, NHZIP 03755 · Latest ZHVI $521,201

$521,201FORECAST · 0.00%

BOX SCORE

Back Bay vs Hanover research statistics

Back Bay wins the price comparison. Hanover leads cumulative growth since January 2020 and records the lower selected-model MAE.

Back Bay growth+10.77%

Hanover growth+57.50%

Back Bay 80% range$1.296M–$1.305M

Hanover 80% range$519K–$526K

Back Bay · MAE

Drift · selected	$2,833
Last value	$2,898

Hanover · MAE

Last value · selected	$2,312

Back Bay and Hanover condo and co-op ZHVI trends from January 2020 through August 2026

Source and method. Zillow publishes the underlying ZHVI histories by geography and housing type. ChrionML® manually located the condo/co-op views, compiled and quality-checked 80 monthly observations per ZIP, compared five models across 44 chronological backtests per city, and produced the forecasts and findings. Back Bay source · Hanover source. Zillow did not produce or endorse the forecasts.

Friday, October 2, 2026Week 2 · East

FINAL · MODEL REVIEW COMPLETE80 months · 44 rolling backtests per city

CAM

Cambridge, MAZIP 02139 · Latest ZHVI $886,874

$888,570FORECAST · +0.19%

ITH

Ithaca, NYZIP 14850 · Latest ZHVI $289,770

$289,770FORECAST · 0.00%

BOX SCORE

Cambridge vs Ithaca research statistics

Cambridge leads on forecast value and projected month-ahead momentum; Ithaca leads cumulative appreciation since January 2020.

Cambridge growth+17.8%

Ithaca growth+29.5%

Cambridge range$883K–$892K

Ithaca range$288K–$291K

Cambridge · MAE

Drift · selected	$3,030
Last value	$3,250
Holt damped	$7,877
Linear trend	$20,728
Seasonal naive	$26,619

Ithaca · MAE

Last value · selected	$1,219
Drift	$1,491
Holt damped	$2,661
Seasonal naive	$6,445
Linear trend	$7,662

Source and method. Zillow publishes the underlying ZHVI histories by geography and housing type. ChrionML® located the condo/co-op views, compiled and quality-checked the monthly datasets, compared five models, ran 44 chronological backtests per city, and produced these forecasts and findings. Cambridge source · Ithaca source. Zillow did not produce or endorse the forecasts.

Friday, September 25, 2026Week 1 · East

FINAL80 months · 44 rolling backtests per city

BOS

Boston, MAZIP 02114 · Latest ZHVI $778,846

$779,306FORECAST · +0.06%

PVD

Providence, RIZIP 02903 · Latest ZHVI $436,391

$438,308FORECAST · +0.44%

BOX SCORE

Boston vs Providence research statistics

Boston leads on forecast value; Providence leads projected month-ahead momentum and cumulative appreciation since January 2020.

Boston growth+4.9%

Providence growth+53.2%

Boston range$775K–$784K

Providence range$436K–$440K

Boston · MAE

Drift · selected	$2,824
Last value	$2,953
Holt damped	$6,710
Linear trend	$12,860
Seasonal naive	$19,708

Providence · MAE

Drift · selected	$1,378
Last value	$1,818
Holt damped	$3,250
Linear trend	$7,474
Seasonal naive	$20,511

Source and method. Zillow publishes the underlying ZHVI histories by geography and housing type. ChrionML® located the condo/co-op views, compiled and quality-checked the monthly datasets, compared forecasting models, ran chronological backtests, and produced these forecasts and findings. Boston source · Providence source. Zillow did not produce or endorse the forecasts.